Tag: Sense_organ

abdominal dorsal trichoid sensillum dh1 [FBbt_00002783]

Small, mono-innervated hair of the dorsal sensory complex of larval abdominal segments 1-7. Note that this organ (identified as the anterior organ in the dh1-dh2 organ pair) is reported to be tri-innervated in Campos-Ortega and Hartenstein, 1997. The formerly separate term ‘h3’ (FBbt:00002791) has been merged with dh1: It is clear from comparing the diagrams in Dambly-Chaudiere and Ghysen (1986) with Campos-Ortega and Hartenstein (1997), that the authors are referring to the same sensillum; FlyPNS also states that these are synonyms.

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abdominal lateral pentascolopidial chordotonal organ lch5 [FBbt_00002831]

Pentascolopidial chordotonal organ located in the lateral sensory cluster of the embryonic/larval abdominal segment. Each of the five scolopidia that constitute the LCh5 organ contains a sensory unit composed of a neuron and a scolopale cell, and two accessory cells between which the sensory unit is stretched: a cap cell at the dendritic side and a ligament cell at the axonal side of the neuron (Halachmi et al., 2016). The cap and the ligament cells of all five organs are anchored to the cuticle by two cap attachment cells and one ligament attachment cell (Halachmi et al., 2016). The neuron, scolopale, cap, ligament and cap attachment cells of each scolopidium are derived from a single ato-expressing precursor through four asymmetric cell divisions (Halachmi et al., 2016).

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abdominal lateral trichoid sensillum lh1 [FBbt_00002839]

Lateral mono-innervated hair of larval abdominal segments 1-7. Campos-Ortega and Hartenstein, 1997, state in table 9.1 that lh1 is innervated by lesA and innervates ‘h1’. This appears to be a misrepresentation of Ghysen et al., (1986) as this paper does not appear to make that claim. sr080210.

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abdominal ventral campaniform sensillum vc3 [FBbt_00002879]

A ventrally located campaniform sensillum of larval abdominal segments 1-7, innervated by the dendrite of a single neuron - vesC. The tormogen (socket) cell of this sensillum is unusual in having numerous short cytoplasmic extensions (Barolo et al., 2000). It fasciculates in branch c of the segmental nerve, SNc (Campos-Ortega and Hartenstein, 1997).

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adult labral sense organ [FBbt_00004146]

Sense organ that extends along the adult hypopharynx. It comprises a heterogeneous group of nine sensilla, numbered from proximal to distal, containing a total of 8 mechanosensory and 10 gustatory receptor neurons. Three of these sensilla are gustatory, one with 3 neurons and the others with one each. The remaining 6 sensilla are mechanosensory (Nayak and Singh, 1985). It develops from the epiphysis (larval labral sense organ).

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antennal basiconic sensillum ab10 [FBbt_00067019]

Small antennal basiconic sensillum innervated by the dendrites of two ORNs. It is distinguishable from other small bidendritic ab sensilla by its odor response profile (de Bruyne and Baker, 2008) and the identity of the ORNs that innervate it (49a/85f and 67a). There are more of these sensilla in females than males (Grabe et al., 2016).

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antennal basiconic sensillum ab2 [FBbt_00067002]

A large olfactory basiconic sensillum of the antenna, innervated by 2 ORNs. It is distinguishable from ab3 by its odor response profile (De Bruyne et al., 2001) and the identity of the ORNs that innervate it (59b and 85a/33b; Couto et al., 2005). There are more of these sensilla in females than males (Grabe et al, 2016). Based on its size and the number of innervating ORNS, this is likely to correspond to LB-I (FBbt:00007355) or LB-II2 (FBbt:00007356) of Shanbhag et al., 1999, but it is not clear which.

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antennal basiconic sensillum ab3 [FBbt_00067024]

A large olfactory basiconic sensillum of the antenna, innervated by 2 ORNs. It is distinguishable from ab2 by its odor response profile (De Bruyne et al., 2001) and the identity of the ORNs that innervate it (22 and 85b; Couto et al., 2005; de Bruyne and Baker, 2008). Based on its size and the number of innervating ORNS, this is likely to correspond to LB-I (FBbt:00007355) or LB-II2 (FBbt:00007356) of Shanbhag et al., 1999, but it is not clear which.

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antennal basiconic sensillum ab6 [FBbt_00067060]

Thin antennal basiconic sensillum innervated by the dendrites of two ORNs. It is distinguishable from ab5 - ab10 by its odor response profile (De Bruyne et al., 2001) and the identity of the ORNs that innervate it (49b; Couto et al., 2005; de Bruyne and Baker, 2008). There are more of these sensilla in females than males (Grabe et al, 2016).

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antennal coeloconic sensillum ac1 [FBbt_00067038]

Coeloconic olfactory sensillum of the antenna that is innervated by three olfactory receptor neurons (ORN). It is distinguishable from ac2, ac3 and ac4 by its odor response profile (Yao et al., 2005) and the identity of the ORNs that innervate it. The sensilla are present in the anterior antennal surface just ventral to the arista (Benton et al., 2009).

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antennal coeloconic sensillum ac3 [FBbt_00110022]

Coeloconic olfactory sensillum of the antenna that is innervated by two olfactory receptor neurons (ORN). It is distinguishable from ac1, ac2 and ac4 by its odor response profile (Yao et al., 2005) and the identity of the ORNs that innervate it (Benton et al., 2009). The sensilla are present in the posterior antennal surface (Benton et al., 2009).

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antennal coeloconic sensillum ac4 [FBbt_00110023]

Coeloconic olfactory sensillum of the antenna that is innervated by three olfactory receptor neurons (ORN). It is distinguishable from a1, ac2 and ac3 by its odor response profile (Yao et al., 2005) and the identity of the ORNs that innervate it (Benton et al., 2009). There are more of these sensilla in females than males (Grabe et al, 2016).

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antennal intermediate sensillum ai2 [FBbt_00067032]

Olfactory intermediate sensillum of antennal segment 3 that is innervated by olfactory receptor neuron Or83c and olfactory receptor neuron Or23a. There are more of these sensilla in males than females (Grabe et al, 2016). Reclassified from trichoid to intermediate by fluorescence-guided single sensillum recording (FG-SSR) (Lin and Potter, 2015; FBC:CP).

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antennal segment 3 thermosensory organ [FBbt_00007334]

Thermosensory organ of antennal segment 3. Sayeed and Benzer, 1996, inferred the presence of thermosensory organ(s) on antennal segment 3 from the results of antennal segment ablation experiments. However, they did not identify which sensilla are responsible. These same experiments showed no effect on thermosensation when the arista alone was removed.

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anterior pharyngeal organ [FBbt_00002687]

Sensillum of the lateral part of the embryonic/larval dorsal pouch (Campos-Ortega and Hartenstein, 1997). It contains a single neuron (first seen at embryonic stage 15) that is located dorsal to Bolwig’s nerve (at stages 16-17) and fasciculates with the lateropharyngeal nerve (SN-V). Schmidt-Ott et al., (1994) tentatively assign this to the mandibular segment on the basis of its fasciculation pattern. This evidence is much weaker than the genetic evidence they use to determine the segmental identity of other head sensilla.

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anterior prothoracic chordotonal organ [FBbt_00007656]

V-shaped chordotonal organ with one arm attached to the anterior wall of the thorax at the articulation of the head, immediately below the prosternal sense organ and the other arm fixed to the hypotremal apodeme (Power, 1948). The joint between the two arms is directed posteromedially and pressed against the anterolateral corner of the prothoracic neuromere (Power, 1948). A thick, short group of fibers, the prothoracic chordotonal nerve, connects this organ to the ventral nerve cord (Power et al., 1948).

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aristal sensillum [FBbt_00004185]

Sensillum of the arista. There are three of these per arista, each consisting of a pair of sensory neurons surrounded by 2 sheath cells. They project into the lymph space of the arista core, where they float freely - unattached to the epidermis. These projections consist of specialized dendrites surrounded throughout their length by sheath cells and distally by an electron dense dendritic sheath. The three projections terminate at different points along the shaft. Foelix et al., 1989, suggest that the morphology of the highly lamellated neurons found in these sensilla is consistent with a thermosensory function based on the similarity of this morphology to that of thermosensory neurons in the antennae of other insects. However, Sayeed and Benzer, 1996, show that surgical removal of the arista has no effect on the temperature preference of flies, but it does eliminate the preference of flies for dry vs moist air, suggesting a hygrosensory function.

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basiconic sensillum of sacculus [FBbt_00004184]

Sensillum of chamber I of the sacculus of the antenna. The sensilla are devoid of pores, have no socket at the base and gradually taper at the distal end. The sensilla have an irregularly sculpted external surface at their distal end. They are innervated by two or three sensory cells. There are 5-7 of these sensilla; two of these contain both water- and thermo-sensitive neurons, the remaining are water-sensitive (Shanbhag et al., 1995).

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blunt-tipped sensillum [FBbt_00005192]

Sensillum of the coeloconic type that does not have a pore. It is 2 micrometers long and 1.7 micrometers wide at the base, tapering towards the tip. A pore-like structure at the distal end is plugged by electron-dense material. At the very tip, the sensillum is covered by a similar electron-dense structure. The outer cuticular surface is smooth. Internally, the cuticle has a spongy appearance. There is a single central lumen that terminates below the electron-dense layer.

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blunt-tipped sensillum of sacculus [FBbt_00004183]

Coeloconic sensillum of chamber II of the sacculus of the antenna. The sensilla are blunt-tipped with a smooth cuticular surface and have a pore-like structure at their distal end. They are innervated by three sensory cells, which include water- and thermo-sensitive neurons. There are 6 sensilla of this type (Shanbhag et al., 1995).

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campaniform sensillum of distal group [FBbt_00002692]

Campaniform sensillum located in the distal region of the terminal organ, on the head of the embryo/larva. There are three of these sensilla and each contains the dendrite of a mechanosensory neuron, which terminates more proximally and ends with a tubular body, as well as dendrites from gustatory receptor neurons (Rist and Thum, 2017).

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campaniform sensillum of dorsal humeral crossvein [FBbt_00004084]

Humeral crossvein campaniform sensillum located on the dorsal side of the wing. It is situated close to the ventral humeral crossvein campaniform sensillum separated by the intermediate portion of the costal nerve (Murray et al., 1984). It is circular with a high profile and with a socket which is prominent on one side but becomes indistinct on the other. The sensillum is around 8 micrometers in diameter.

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campaniform sensillum of dorsal radius Sc12 [FBbt_00004346]

Campaniform sensillum of the dorsal side of the medial radius of the adult wing. These cells are arranged in two distinct fields. The first has four circular sensilla with high profile and with a socket (type 1), distributed on the anterior face of the medial radius, with each sensillum around 4.5 micrometers in diameter (d.Rad.D). The second has eight circular sensilla, with low profile and with socket (type 3), with each sensillum between 5.0-5.5 micrometers in diameter (d.Rad.E).

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campaniform sensillum of dorsal radius Sc25 [FBbt_00004345]

Campaniform sensillum belonging to a more dispersed group of cells, distal to the Sc4d cells, on the dorsal side of the proximal radius of the adult wing. These cells belong to two distinct fields. The first has seven elliptical sensilla with low profile and with a socket (type 6), distributed in a round patch, with each sensillum between 2.5-3.0 micrometers in length (d.Rad.B). The second has around 17 circular sensilla, with low profile and without socket (type 4), with each sensillum between 2.5-3.5 micrometers in diameter (d.Rad.C).

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campaniform sensillum of dorsal radius Sc4d [FBbt_00004344]

Campaniform sensillum of the most proximal cluster of the dorsal side of the proximal radius of the adult wing. There are four of these circular sensilla with a high profile and without a socket (type 2), they are arranged in a row and increase in diameter distally, from 3.5 to 4.5 micrometers.

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campaniform sensillum of larval intercalary segment [FBbt_00002682]

Any campaniform sensillum (FBbt:00005183) that is part of some larval intercalary segment (FBbt:00001736). Dinges et al. (2020) confirmed that there is no campaniform sensilla on the adult head, so this term can only refer to a larval campaniform sensillum. [FlyBase: FBrf0247616]

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campaniform sensillum of ventral humeral crossvein [FBbt_00004085]

Humeral crossvein campaniform sensillum located on the ventral side of the wing. It is situated close to the dorsal humeral crossvein campaniform sensillum separated by the intermediate portion of the costal nerve (Murray et al., 1984). It is a large circular sensillum which bears a socket that is tightly fused to the dome and diminishes on one side. The sensillum is around 6.5 micrometers in diameter.

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campaniform sensillum of ventral radius Sc1 [FBbt_00058030]

A single campaniform sensillum of the medial radius on the ventral surface of the adult wing, located about 15 micrometers distally to the most distal campaniform sensillum of the v.Rad.C group (Dinges et al., 2020). This sensillum was previously described as being part of the v.Rad.C group, but Dinges et al. (2020) define it as a distinct single campaniform sensillum, due to its distance to that group and its clear morphological differences.

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campaniform sensillum of ventral radius Sc3 [FBbt_00004350]

Campaniform sensillum on the border of the proximal and medial radius, on the ventral surface of the adult wing. There are three circular sensilla with a high profile and with a socket (type 1), with the cuticle of the domes often peaked. Each sensillum is between 2.5-3.5 micrometers in diameter.

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campaniform sensillum of ventral radius Sc4 [FBbt_00058029]

Campaniform sensillum that is part of group of 4 sensilla on the ventral surface of the adult wing, arranged linearly along the medial radius. Each sensillum has a low profile and a socket (type 3), and is around 4.5 micrometers in diameter (Bryant, 1975; Cole and Palka, 1982; Dinges et al., 2020). The term v.Rad.C initially referred to all 5 sensilla of the ventral medial radius, but Dinges et al. (2020) suggest that it should only refers to this group of 4, excluding the one they call v.Rad.C.1.

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campaniform sensillum of ventral radius Sc5 [FBbt_00004351]

Campaniform sensillum of the medial radius on the ventral surface of the adult wing. There are five circular sensilla with low profile and with a socket (type 3), arranged linearly along the medial radius. Each sensillum is around 4.5 micrometers in diameter. Dinges et al. (2020) suggest that v.Rad.C be used to refer only to the 4 most proximal campaniform sensilla (campaniform sensillum of ventral radius Sc4) instead of all 5 sensilla of the ventral radius.

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chemosensory dorsal double row bristle [FBbt_00100191]

Multiply innervated, recurved bristle of the dorsal double row involved in chemosensation. This bristle also shows a conspicuous terminal pore. Palka et al., (1979) show that of the five dendrites innervating the wing margin chemosensory bristles, one contains a microtubular body, suggesting it to be a mechanosensory neuron. That this bristle is chemosensory in nature is based on the presence of the terminal pore and multiple innervation with dendrites extending to the pore (Palka et al., 1979).

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chemosensory sensillum of the female genitalia [FBbt_00100131]

Short, blunt-tipped thorn bristle or spine bristle located on the adult vaginal plate. There are around 10 bilateral pairs of thorn bristles and around 3 bilateral pairs of spine bristles. Note: currently there is no direct evidence that these neurons are definitely chemosensory. That they are likely to be chemosensory in nature is based on their morphology (Taylor, 1989), that they are multiply innervated (Taylor, 1989), and behavioral observations of the animals during egg laying (Yang et al., 2008).

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chemosensory ventral double row bristle [FBbt_00100108]

Multiply innervated, recurved chemosensory bristle of the ventral double row with a conspicuous terminal pore. Palka et al., (1979) show that of the five dendrites innervating the wing margin chemosensory bristles, one contains a microtubular body, suggesting it to be a mechanosensory neuron. That this bristle is chemosensory in nature is based on the presence of the terminal pore and multiple innervation with dendrites extending to the pore (Palka et al., 1979).

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chemosensory ventral triple row bristle [FBbt_00004335]

Multiply innervated, recurved taste bristle of the ventral triple row and the ventral row. This bristle also shows a conspicuous terminal pore. Palka et al., (1979) show that of the five dendrites innervating the wing margin chemosensory bristles, one contains a microtubular body, suggesting it to be a mechanosensory neuron. That this bristle is chemosensory in nature is based on the presence of the terminal pore and multiple innervation with dendrites extending to the pore (Palka et al., 1979).

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cibarial sense organ [FBbt_00004139]

Compound sense organ located in the cibarium of the adult pharynx, near the upper end of the posterior cibarial plate. It comprises two sense organs, dorsal and ventral, that are innervated by gustatory receptor neurons. This term, as used by Miller in Demerec (1994) refers only to the dorsal cibarial sense organ (Stocker and Schorderet, 1981).

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coeloconic sensillum of antennal segment 3 [FBbt_00004177]

Olfactory coeloconic sensillum that is part of antennal segment 3. A short conical peg arising from a broad basal platform, basally smooth but distally having deep longitudinal grooves. The peg has a double cuticular wall. The inner wall encloses a central lumen innervated by olfactory receptor neuron dendrites. Distally, the central lumen is connected to the outer, sensillum lymph-filled chamber by radial spoke channels. Morphology is consistent with these sensilla being olfactory (Shanbhag et al., 1999). This function has been directly confirmed by electrophysiology (Clyne et al., 1997).

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dorsal cibarial sense organ [FBbt_00004140]

Dorsal-most cibarial sense organ near the upper end of the posterior cibarial plate of the adult pharynx, and innervated by the pharyngeal nerve. It comprises two sensilla (anterior and posterior), each containing three gustatory receptor neurons. This term corresponds to the cibarial sense organ as used by Miller in Demerec (1994) and to the fulcral organ as used by Hertweck (1931).

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dorsal margin ommatidium [FBbt_02000000]

An ommatidial subtype located in a single row at the dorsal margin of the eye. This ommatidial subtype is specialized to detect the e-vector of polarized sunlight. The dorsal margin ommatidium expresses the opsin Rh3 (FBgn0003249) that detects polarized light in both photoreceptor R7 and R8 cells (Fortini and Rubin, 1990).

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dorsal pedicellar campaniform sensillum [FBbt_00004415]

A campaniform sensillum that is one of around 40 sensilla arranged in 10 transverse rows on the dorsal side of the pedicel. It is elliptical with a low profile and socket (type 5). The central cuticular specialization has a raised profile, and the sockets are fused to the sockets of adjacent sensilla in the same row. It is around 3-4 micrometers in length.

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dorsal row bristle of the cibarium [FBbt_00004137]

One of 6-8 singly innervated bristles of dorsal row of the cibarial fish-trap bristle, dorsal to the ventral cibarial sense organ. They are innervated by mechanosensory neurons. Disambiguation: these bristles are sometimes referred to as the ‘dorsal row’ (Stocker and Schorderet, 1981; Nayak and Singh, 1983), which may be confused with the ‘dorsal row’ sensilla of the anterior wing margin (Bate and Martinez Arias, 1991). They are also referred to as the upper (or proximal) fishtrap bristles (Gendre et al., 2004).

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dorsal triple row bristle [FBbt_00100103]

Multiply innervated, recurved bristle of the dorsal triple row involved in chemosensation. This bristle has a conspicuous terminal pore. Palka et al., (1979) show that of the five dendrites innervating the wing margin chemosensory bristles, one contains a microtubular body, suggesting it to be a mechanosensory neuron. That this bristle is chemosensory in nature is based on the presence of the terminal pore and multiple innervation with dendrites extending to the pore (Palka et al., 1979).

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dorso-lateral group terminal organ sensillum [FBbt_00002706]

One of 3 dorso-laterally located sensilla of the larval terminal organ. Jurgens et al. (1986), explain that the DLP and DMP are considered to be of different origins to the other 7 papillae of the terminal organ/MxSO because their axons do not join the maxillary nerve and they are found in different locations in certain homeotic mutants.

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dorsolateral papilla [FBbt_00002679]

Papilla of the dorsolateral group of the terminal organ, on the head of the embryo/larva. It is located more laterally than the dorsomedial papilla, next to the spot sensillum of the dorsolateral group. This sensillum is innervated by one dendrite, which ends with a tubular body, indicative of mechanosensation, below the bud-shaped cuticle shaft (Rist and Thum, 2017).

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embryonic/larval labial organ [FBbt_00002720]

A compound external sense organ of the late embryo or larva. It is located in the lower lip of the external opening of the atrium. It consists of 3 sensilla, one with 3 neurons and the others with one each. Neurons of the labial organ and hypophysis (labial sensory organ) form a large cluster flanking the salivary duct.

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eo-type sensillum [FBbt_00007232]

Sensillum with innervated external cuticular sensory structure consisting of one or more bipolar sensory neurons, and 3 support cells: a trichogen cell which makes the external cuticular sensory structure, a thecogen cell which makes the socket that holds the base of the external sensory structure and a tormogen cell which makes the cuticular matrix (cap) at the tip of the innervating dendrite(s).

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epiphysis [FBbt_00007281]

Paired compound sense organ of the labral complex in the larval head. It consists of 6 sensilla in the larval pharynx: one tri-dendritic, 2 bi-dendritic and 3 mono-dendritic. Projections from the epiphysis generally, though not exclusively, target the contralateral subesophageal ganglion area 1 (Colomb et al., 2007). Colomb et al., (2007) report that labral nerve projections pass through area 2 and into area 1 of the subesophageal ganglion. In the majority of cases they then target the contralateral area 2. An exception to this is one epiphysis fiber (which labels with Gr2a-GAL4) which targets inside area 4.

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giant sensillum of the dorsal radius [FBbt_00004083]

Large, singly-innervated campaniform sensillum on the posterior face of the distal radius of the adult wing. It is a large circular sensillum, with a high profile and a distinct discontinuity between the dome and socket. It is around 9 micrometers in diameter. Note that several references use the term ‘giant sensillum of the radius’ (e.g. Palka et al., 1979), and others use the term ‘giant sensillum of the dorsal radius’ (e.g. Huang et al., 1991). For consistency, we adopt this latter usage.

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gonopod long bristle [FBbt_00004467]

Single long bristle of the female gonopod. Note: currently there is no direct evidence that these neurons are definitely chemosensory. That they are likely to be chemosensory in nature is based on their morphology (Taylor, 1989), that they are multiply innervated (Taylor, 1989), and behavioral observations of the animals during egg laying (Yang et al., 2008).

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gonopod thorn bristle [FBbt_00004466]

Thorn bristle of the female gonopod. There are 11-16 of these. Note: currently there is no direct evidence that these neurons are definitely chemosensory. That they are likely to be chemosensory in nature is based on their morphology (Taylor, 1989), that they are multiply innervated (Taylor, 1989), and behavioral observations of the animals during egg laying (Yang et al., 2008).

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grooved sensillum [FBbt_00005191]

Sensillum that is double-walled, containing an open slit channel system. For three-fourths of its length from the tip, the cuticular surface bears alternating longitudinal grooves and ridges. In cross-section, the cuticle is hollow and looks like a ring of spheres, each with a small solid cuticular ridge on its external surface. In the groove, between two ridges, there is a small slit, exposing the interior of the sensillum to the outside. Proximally, the lateral walls of adjacent cuticular ridges fuse. The inner wall surrounds the lumen of the hair, which contains a thin, loosely scattered, electron-lucent homogeneous material. It is innervated by two sensory neurons. There are 2 types of grooved sensillum, both found in chamber III of the sacculus.

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grooved sensillum 2 [FBbt_00004182]

Sensillum of the dorsal compartment of chamber III of the sacculus of the antenna. The sensilla are slender than the grooved sensillum 1 and bear 6-8 grooves with slit channels. They are innervated by 2 sensory cells, one olfactory and one thermo-sensitive neuron. There are 11 sensilla of this type (Shanbhag et al., 1995).

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hypophysis [FBbt_00002719]

Paired compound sense organ of the labial segment in the larval head, located on the floor of the atrium, anterior to the opening of the salivary duct. It is composed of 4 sensilla. Sensory neurons travel via the labial nerve and innervate area 2 of the embryonic/larval subesophageal ganglion. Neurons of the hypophysis and labial organ form a large cluster flanking the salivary duct.

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I-type sensillum I1 [FBbt_00100059]

Most anterior I-type chemosensillum of the labellum. It can respond to a narrow range of bitter stimuli (Weiss et al., 2011). Naming of sensilla is based on figure 2(b) of Hiroi et al., (2002). It corresponds to sensillum I0 in Weiss et al., (2011). Note that both Shanbhag et al., (2001) and Hiroi et al., (2002) claim there are between 9 and 10 I-type sensilla present.

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I-type sensillum I10 [FBbt_00100068]

Tenth most anterior I-type chemosensillum of the labellum. It can respond to a narrow range of bitter stimuli (Weiss et al., 2011). Naming of sensilla is based on figure 2(b) of Hiroi et al., (2002). It corresponds to sensillum I9 in Weiss et al., (2011). Note that both Shanbhag et al., (2001) and Hiroi et al., (2002) claim there are between 9 and 10 I-type sensilla present.

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I-type sensillum I3 [FBbt_00100061]

Third most anterior I-type chemosensillum of the labellum. It can respond to a narrow range of bitter stimuli (Weiss et al., 2011). Naming of sensilla is based on figure 2(b) of Hiroi et al., (2002). It corresponds to sensillum I1 in Weiss et al., (2011). Note that both Shanbhag et al., (2001) and Hiroi et al., (2002) claim there are between 9 and 10 I-type sensilla present.

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I-type sensillum I4 [FBbt_00100062]

Fourth most anterior I-type chemosensillum of the labellum. It can respond to a narrow range of bitter stimuli (Weiss et al., 2011). Naming of sensilla is based on figure 2(b) of Hiroi et al., (2002). It corresponds to sensillum I2 in Weiss et al., (2011). Note that both Shanbhag et al., (2001) and Hiroi et al., (2002) claim there are between 9 and 10 I-type sensilla present.

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I-type sensillum I5 [FBbt_00100063]

Fifth most anterior I-type chemosensillum of the labellum. It can respond to a narrow range of bitter stimuli (Weiss et al., 2011). Naming of sensilla is based on figure 2(b) of Hiroi et al., (2002). It corresponds to sensillum I3 in Weiss et al., (2011). Note that both Shanbhag et al., (2001) and Hiroi et al., (2002) claim there are between 9 and 10 I-type sensilla present.

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I-type sensillum I6 [FBbt_00100064]

Sixth most anterior I-type chemosensillum of the labellum. It can respond to a narrow range of bitter stimuli (Weiss et al., 2011). Naming of sensilla is based on figure 2(b) of Hiroi et al., (2002). It corresponds to sensillum I4 in Weiss et al., (2011). Note that both Shanbhag et al., (2001) and Hiroi et al., (2002) claim there are between 9 and 10 I-type sensilla present.

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I-type sensillum I7 [FBbt_00100065]

Seventh most anterior I-type chemosensillum of the labellum. It can respond to a narrow range of bitter stimuli (Weiss et al., 2011). Naming of sensilla is based on figure 2(b) of Hiroi et al., (2002). It corresponds to sensillum I5 in Weiss et al., (2011). Note that both Shanbhag et al., (2001) and Hiroi et al., (2002) claim there are between 9 and 10 I-type sensilla present.

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I-type sensillum I8 [FBbt_00100066]

Eight most anterior I-type chemosensillum of the labellum. It can respond to bitter stimuli (Weiss et al., 2011). Naming of sensilla is based on figure 2(b) of Hiroi et al., (2002). It corresponds to sensillum I7 in Weiss et al., (2011). Note that both Shanbhag et al., (2001) and Hiroi et al., (2002) claim there are between 9 and 10 I-type sensilla present. Weiss et al., (2011) found that it had a variable identity and could not assign it to a specific group.

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I-type sensillum I9 [FBbt_00100067]

Ninth most anterior I-type chemosensillum of the labellum. It can respond to a narrow range of bitter stimuli (Weiss et al., 2011). Naming of sensilla is based on figure 2(b) of Hiroi et al., (2002). It corresponds to sensillum I8 in Weiss et al., (2011). Note that both Shanbhag et al., (2001) and Hiroi et al., (2002) claim there are between 9 and 10 I-type sensilla present.

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intermediate labellar taste bristle [FBbt_00007412]

Intermediate sized taste bristle of the outside of the labellum: each bristle is around 25 micrometers long. These bristles are located dorsally, on the labellar lobe periphery. These taste bristles house the sensory dendrites of 2 gustatory receptor neurons (Shanbhag et al., 2001): one sensitive to sugars and low concentrations of salt and the other to bitter and high salt concentrations (Hiroi et al., 2004). These taste bristles also contains the sensory dendrite of one mechanosensory neuron (Shanbhag et al., 2001).

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intermediate sensillum of antennal segment 3 [FBbt_00007359]

Olfactory sensillum of antennal segment 3. It resembles antennal segment 3 trichoid sensillum in cuticular morphology, pore structure and dimensions, but, like antennal segment 3 basiconic sensilla, it lacks a basal drum and is innervated by branched dendrites from 2-3 ORNs. Morphology is consistent with olfactory function, as is the expression and localization of odorant binding proteins (Shanbhag et al., 2001; Shanbhag et al., 2005).

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Johnston organ [FBbt_00004178]

Compound chordotonal organ of antennal segment 2 involved in hearing (Gopfert and Robert, 2002), direction-sensitive wind detection (Yorozu et al., 2009) and gravitaxis (Kamikouchi et al., 2009). The actin-filament rich basal tips of the Johnston’s organ scolopidia connect to the inner surface of antennal segment 2, and the apical tips connect to the hook of antennal segment 3 (Gopfert and Robert, 2002). Its sensory neurons (Johnston’s organ neurons or JONs) are connected to the Johnston’s organ nerve (Kamikouchi et al., 2006), and predominantly innervate the antennal mechanosensory and motor center (AMMC). There are 477 +/- 24 cell bodies, arranged in a bowl shape lying vertically with the ’top’ facing the lateral side, and forming a ring around the antennal nerve (Kamikouchi et al., 2006). JONs connecting to opposing sides of the hook are alternatively stimulated by stretching or compression according to the hook’s oscillatory movement (Gopfert and Robert, 2002). Yorozu et al., 2009, identify tonically activated Johnston’s organ neurons that respond to forward or reverse deflection of the antenna. Genetic ablation of these neurons inhibits wind-induced behavioral responses without impairing hearing. Further, by expression of tetanus toxin, Kamikouchi et al., 2009, identify the same neuronal population as essential for gravitaxis behavior.

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knob in pit sensillum [FBbt_00002715]

Paired external sensillum situated dorso-laterally on the larval head and consisting of a knob shaped cuticular structure located in a pit and innervated by 3 dendrites - one terminating at its base and the other two extending into the knob. Putative combined mechanoreceptor (Singh and Singh, 1984) and taste sensillum (Singh, 1997).

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L-type sensillum L3 [FBbt_00100071]

Third most anterior L-type chemosensillum of the labellum. Naming of sensilla is based on figure 2(b) of Hiroi et al., 2002. It corresponds to sensillum L7 in Weiss et al., (2011). Note that Shanbhag et al., (2001) report that there are between 7 and 9 L-type sensilla, whilst Hiroi et al., (2002) claim no variation from 9 sensilla.

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L-type sensillum L4 [FBbt_00100072]

Fourth most anterior L-type chemosensillum of the labellum. Naming of sensilla is based on figure 2(b) of Hiroi et al., 2002. It corresponds to sensillum L3 in Weiss et al., (2011). Note that Shanbhag et al., (2001) report that there are between 7 and 9 L-type sensilla, whilst Hiroi et al., (2002) claim no variation from 9 sensilla.

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L-type sensillum L5 [FBbt_00100073]

Fifth most anterior L-type chemosensillum of the labellum. Naming of sensilla is based on figure 2(b) of Hiroi et al., 2002. It corresponds to sensillum L8 in Weiss et al., (2011). Note that Shanbhag et al., (2001) report that there are between 7 and 9 L-type sensilla, whilst Hiroi et al., (2002) claim no variation from 9 sensilla.

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L-type sensillum L6 [FBbt_00100074]

Sixth most anterior L-type chemosensillum of the labellum. Naming of sensilla is based on figure 2(b) of Hiroi et al., 2002. It corresponds to sensillum L4 in Weiss et al., (2011). Note that Shanbhag et al., (2001) report that there are between 7 and 9 L-type sensilla, whilst Hiroi et al., (2002) claim no variation from 9 sensilla.

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L-type sensillum L7 [FBbt_00100075]

Seventh most anterior L-type chemosensillum of the labellum. Naming of sensilla is based on figure 2(b) of Hiroi et al., 2002. It corresponds to sensillum L9 in Weiss et al., (2011). Note that Shanbhag et al., (2001) report that there are between 7 and 9 L-type sensilla, whilst Hiroi et al., (2002) claim no variation from 9 sensilla.

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L-type sensillum L8 [FBbt_00100076]

If present, eighth most anterior L-type chemosensillum of the labellum. Naming of sensilla is based on figure 2(b) of Hiroi et al., 2002. It corresponds to sensillum L5 in Weiss et al., (2011). Note that Shanbhag et al., (2001) report that there are between 7 and 9 L-type sensilla, whilst Hiroi et al., (2002) claim no variation from 9 sensilla.

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L-type sensillum L9 [FBbt_00100077]

If present, ninth most anterior L-type chemosensillum of the labellum. Naming of sensilla is based on figure 2(b) of Hiroi et al., 2002. It corresponds to sensillum L6 in Weiss et al., (2011). Note that Shanbhag et al., (2001) report that there are between 7 and 9 L-type sensilla, whilst Hiroi et al., (2002) claim no variation from 9 sensilla.

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large anterior vibrissal bristle [FBbt_00052782]

Large vibrissal bristle with a relatively anterior position within the vibrissae, directly below the antenna. There are usually 2-4 of these on each side. Especially in other species, these are sometimes specifically referred to as vibrissae, though melanogaster papers tend to refer to the full line of gena bristles as vibrissae.

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large basiconic sensillum [FBbt_00005188]

The largest subtype of basiconic sensilla. It measures 12 micrometers and 2.5 micrometers wide with blunt tips. Directly above the base of the sensillum, the shaft diameter is often somewhat reduced resulting in a club-shaped appearance. The pores are arranged in lines, positioned wider apart than in the small basiconic sensillum. It is innervated by two or 4 sensory neurons. Two subtypes can be identified, base on the internal morphology of the peg (LB-I and LB-II). Large basiconic sensilla are found in the antennal segment 3.

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large basiconic sensillum of antennal segment 3 [FBbt_00004175]

Large, blunt tipped, olfactory basiconic sensillum of antennal segment 3. The external sensory structure is perforated by pores, arranged along a complicated pattern of branched lines, that connect to a lymph-filled lumen containing the highly branched dendrites of 2-4 ORNs. Morphology is consistent with these sensilla being olfactory (Shanbhag et al., 1999). This function has been directly confirmed by electrophysiology (Clyne et al., 1997).

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large chordotonal organ of scabellum [FBbt_00004413]

Large chordotonal organ of the base of the haltere, that is inserted axially in this region. Original reference for these (FlyBase:FBrf0239028) is based on other flies. Chordotonal organs were not identified in Drosophila halteres by Tsubouchi et al. (2017) (FlyBase:FBrf0237124) [FBC:CP].

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large labellar taste bristle [FBbt_00007411]

Largest taste bristle subtype of the outside labellum: each bristle is around 35 micrometres long. These bristles are located in the region between the intermediate bristles on the lobe periphery and the medial-ventrally located short taste bristles. These taste bristles contain 4 gustatory receptor neurons (Shanbhag et al., 2001) sensitive to: sugars, low concentrations of salt, bitter or high salt concentrations and water or low osmolarity (Meunier et al., 2003; Fujishiro et al., 1984) and one mechanosensory neuron (Shanbhag et al., 2001). Large taste bristles do not respond to bitter stimuli and their gustatory receptor neurons do not express the bitter receptor Gr66a (Weiss et al., 2011).

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main tegula campaniform sensillum [FBbt_00111362]

Campaniform sensillum found on the medial surface of the tegula of the adult wing. There are 18 elliptical sensilla with high profile and with a socket (type 5). Fourteen of these form a compact central population oriented with their major axis perpendicular to the proximodistal axis of the wing. Two larger sensilla of the same type flank this population, oriented parallel to the wing axis.

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maxillary palp basiconic sensillum [FBbt_00004159]

Olfactory basiconic sensillum of the maxillary palp. The surface of the sensillum is perforated by numerous pores, arranged along a complicated pattern of branched lines, connecting to a lymph space innervated by branched dendrites from two ORNs. These sensilla are located predominantly on the distal half of the dorsal surface and the lateral edge of each maxillary palp.

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maxillary palp basiconic sensillum pb1 [FBbt_00067040]

Basiconic olfactory sensillum of maxillary palp that is innervated by the dendrites of two ORNs. It is distinguishable from pb2 and pb3 by its odor response profile (Goldman et al., 2005) and the identity of the ORNs that innervate it (42a and 71a; Couto et al., 2005; Goldman et al., 2005).

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maxillary palp basiconic sensillum pb2 [FBbt_00067035]

Basiconic olfactory sensillum of maxillary palp that is innervated by the dendrites of two ORNs. It is distinguishable from pb1 and pb3 by its odor response profile (Goldman et al., 2005) and the identity of the ORNs that innervate it (85e/33c and 46a; Couto et al., 2005; Goldman et al., 2005).

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maxillary palp basiconic sensillum pb3 [FBbt_00067006]

Basiconic olfactory sensillum of maxillary palp that is innervated by the dendrites of two ORNs. It is distinguishable from pb1 and pb2 by its odor response profile (Goldman et al., 2005) and the identity of the ORNs that innervate it (59c and 85d; Couto et al., 2005; Goldman et al., 2005).

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maxillary palp bristle [FBbt_00004160]

Trichoid sensillum of the maxillary palp with an external sensory structure that is anchored in a socket and consists of a small bundle of closely apposed fibers, each of which has grooves running longitudinally. No obvious pores are present. Structure is consistent with these sensilla being mechanosensory rather than chemosensory (Riesgo-Escovar et al., 1997).

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McKellar_Gr64f [VFB_001014q5]

effector genotype: ‘20XUAS-IVS-mCD8::GFP in su(Hw)attP5 (pJFRC2)’ [confocal microscopy; adult brain; gustatory sensory organ; adult neuron; male organism; McKellar_Gr64f; expression pattern fragment; is part of; JRC2018Unisex; P{Gr64f-GAL4.9.7} expression pattern; sugar-sensing neuron; adult sense organ]

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McKellar_Gr66a [VFB_001014q6]

effector genotype: ‘20XUAS-IVS-mCD8::GFP in su(Hw)attP5 (pJFRC2)’ [confocal microscopy; McKellar_Gr66a; gustatory sensory organ; adult neuron; male organism; expression pattern fragment; is part of; JRC2018Unisex; bitter-sensing neuron; adult brain; adult sense organ; P{Gr66a-GAL4.D} expression pattern]

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mesothoracic femoral chordotonal organ 2 [FBbt_00004382]

One of the small chordotonal organ of the adult mesothoracic femur. It is located in the center of the femur and has around 14 scolopidia. Distally, the scolopidia are more scattered than the mesothoracic femoral chordotonal organ 1, with a majority of them connected to the femoral muscle membrane.

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mesothoracic femoral chordotonal organ 3 [FBbt_00004383]

One of the small chordotonal organ of the adult mesothoracic femur. It is located in the center of the femur and has between 25-28 scolopidia. Distally, the scolopidia are more scattered than the mesothoracic femoral chordotonal organ 1, with a majority of them connected to the femoral muscle membrane.

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mesothoracic leg tarsal taste bristle [FBbt_00111618]

Gustatory bristle found on the tarsal segments of the mesothoracic (2nd) leg of the adult. It has a straight tip. In the female, most sensilla are organized in symmetric pairs (with two exceptions), with lateral sensilla having a counterpart on the medial side of the leg. The male sensilla appear similar to the female ones. The organization of taste sensilla is similar in all three legs with a few exceptions.

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metathoracic femoral chordotonal organ 2 [FBbt_00004440]

One of the small chordotonal organ of the adult metathoracic femur. It is located in the center of the femur and has around 14 scolopidia. Distally, the scolopidia are more scattered than the metathoracic femoral chordotonal organ 1, with a majority of them connected to the femoral muscle membrane.

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metathoracic femoral chordotonal organ 3 [FBbt_00004441]

One of the small chordotonal organ of the adult metathoracic femur. It is located in the center of the femur and has between 25-28 scolopidia. Distally, the scolopidia are more scattered than the metathoracic femoral chordotonal organ 1, with a majority of them connected to the femoral muscle membrane.

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metathoracic leg tarsal taste bristle [FBbt_00111619]

Gustatory bristle found on the tarsal segments of the metathoracic (3rd) leg of the adult. It has a straight tip. In the female, most sensilla are organized in symmetric pairs (with two exceptions), with lateral sensilla having a counterpart on the medial side of the leg. The male sensilla appear similar to the female ones. The organization of taste sensilla is similar in all three legs with a few exceptions.

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metathoracic tarsal bristle longitudinal row [FBbt_00004452]

Any bristle in one of the 8 longitudinal bracted or bractless bristle rows in a metathoracic tarsal segment. Row 1 is at the ventro-posterioventral position, with numbering continuing through the posterior, dorsal, and anterior surfaces. Row 2 has been replaced by the transverse bristle rows.

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microchaeta [FBbt_00005182]

A sensillum of the adult whose external sensory structure is a hair or short thin bristle. Note that entomologists working in other species may call such sensilla trichoid, but Drosophila biologists typically reserve this for only the very smallest hairs. The reference for the term microchaeta among Drosophilist dates back to at least Lees and Waddington (1942).

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pale ommatidium [FBbt_02000002]

Ommatidial subtype with stochastic distribution throughout the retina, making up about 30% of all ommatidia. This ommatidial subtype is specialized to detect shorter wavelengths (near UV + blue) than yellow ommatidia. The pale ommatidium expresses the near ultraviolet-specific opsin Rh3 (FBgn0003249) in photoreceptor R7 cells and the blue-sensitive Rh5 (FBgn0014019) in photoreceptor R8 cells (Wernet and Desplan, 2004).

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peripheral tegula campaniform sensillum [FBbt_00004360]

Campaniform sensillum found on the anterior medial surface of the tegula of the adult wing. There are two large elliptical sensilla with high profile and with a socket (type 5), arranged orthogonally to the main tegula campaniform sensillum, with their long axis parallel to the proximo-distal axis of the wing. Each sensillum is around 5 micrometers in diameter. These sensilla were not found in a recent comprehensive study of campaniform sensilla, which only mention the 18 sensilla of what is called here the main field of the tegula (Dinges et al., 2020). [FlyBase:FBrf0247616]

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pit sensillum T1 [FBbt_00002701]

The most ventral of the five pit sensilla located in the distal region of the terminal organ, on the head of the embryo/larva. It is innervated by three dendrites, one of which terminates more proximally and ends with a tubular body, indicative of mechanosensation, the other two are the chemosensitive gustatory receptor C10 and C11 neurons (Rist and Thum, 2017).

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pit sensillum T5 [FBbt_00002705]

One of the five pit sensilla located in the distal region of the terminal organ, on the head of the embryo/larva. It is distal to pit sensillum T4. It is innervated by three dendrites, one of which terminates more proximally and ends with a tubular body, indicative of mechanosensation and one of which is gustatory receptor neuron C4 (Rist and Thum, 2017).

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prosternal sense organ [FBbt_00007655]

A sense organ located in a pit in the anterior wall of the thorax - immediately under the neck. It consists of a plate of sensory hairs whose innervating neurons have their cell bodies in a small ganglion behind the organ and project through the prosternal nerve to the prothoracic neuromere. See figure 24 of FBrf0007196 == Power, 1948.

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prothoracic femoral chordotonal organ [FBbt_00004271]

Chordotonal organ of the adult prothoracic femur. There are three chordotonal organs, located in the ventral chamber near the longitudinal septum. There is one large group, on the ventro-medial side, and two smaller ones in the center of the femur. The three groups contain in total 76 scolopidia (Kuan et al., 2020).

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prothoracic femoral chordotonal organ 2 [FBbt_00004273]

One of the small chordotonal organ of the adult prothoracic femur. It is located in the center of the femur and has around 14 scolopidia. Distally, the scolopidia are more scattered than the prothoracic femoral chordotonal organ 1, with a majority of them connected to the femoral muscle membrane.

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prothoracic femoral chordotonal organ 3 [FBbt_00004274]

One of the small chordotonal organ of the adult prothoracic femur. It is located in the center of the femur and has between 25-28 scolopidia. Distally, the scolopidia are more scattered than the prothoracic femoral chordotonal organ 1, with a majority of them connected to the femoral muscle membrane.

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prothoracic leg tarsal taste bristle [FBbt_00111617]

Gustatory bristle found on the tarsal segments of the prothoracic (1st) leg of the adult. It has a straight tip. In the female, most sensilla are organized in symmetric pairs (with two exceptions), with lateral sensilla having a counterpart on the medial side of the leg. The male contains more sensilla and more of them are asymmetric. The organization of taste sensilla is similar in all three legs with a few exceptions.

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prothoracic leg tarsal taste bristle 5s [FBbt_00048186]

Short taste bristle of tarsal segment 5 of the prothoracic leg. It is located proximal to bristle 5v on the ventral tarsal segment 5. One is found on the medial side of the leg and one on the lateral side. It responds to the widest array of tastants of any prothoracic leg taste bristle present in the female, including sugars, bitter compounds and amino acids.

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prothoracic metatarsal segment transverse row bristle [FBbt_00004285]

Any bracted bristle in one of the transverse bristle rows (TR) of the prothoracic metatarsus (tarsal segment 1). The TRs are located in the anterior compartment. There is sexual dimorphism, with females having 7 to 8 TRs, whereas in males, 2 of the TRs have been replaced by the male specific sex comb and central bristle.

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pseudotracheal taste peg [FBbt_00004165]

Taste peg located in rows between and on the lateral sides of the 6 pseudotracheal rows of the adult labellum. Each peg sensillum contains one putative chemosensory and one mechanosensory neuron. The lateral rows contain 1-5 taste pegs per row, whereas the remaining rows contain 7-9 pegs. There is significant sexual dimorphism in the number of pseudotracheal taste pegs, with females having 20% more taste pegs than males (Shanbag et al., 2001).

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S-type sensillum S10 [FBbt_00100055]

Tenth most anterior S-type chemosensillum of the labellum. It can respond to a broad range of bitter stimuli (Weiss et al., 2011). Naming of sensilla is based on figure 2(b) of Hiroi et al., 2002. It corresponds to sensillum S9 in Weiss et al., (2011). Note that Shanbhag et al., (2001) claim 10-13 bristles are present, whilst Hiroi et al., (2002) claim between 12-13.

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S-type sensillum S11 [FBbt_00100056]

If present, eleventh most anterior S-type chemosensillum of the labellum. It can respond to a broad range of bitter stimuli (Weiss et al., 2011). Naming of sensilla is based on figure 2(b) of Hiroi et al., 2002. It corresponds to sensillum S10 in Weiss et al., (2011). Note that Shanbhag et al., (2001) claim 10-13 bristles are present, whilst Hiroi et al., (2002) claim between 12-13.

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S-type sensillum S12 [FBbt_00100057]

If present, twelfth most anterior S-type chemosensillum of the labellum. It can respond to a narrow range of bitter stimuli (Weiss et al., 2011). Naming of sensilla is based on figure 2(b) of Hiroi et al., 2002. It corresponds to sensillum I10 in Weiss et al., (2011). Note that Shanbhag et al., (2001) claim 10-13 bristles are present, whilst Hiroi et al., (2002) claim between 12-13.

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S-type sensillum S2 [FBbt_00100047]

S-type chemosensillum of the labellum, located posterodorsal to S-type sensillum S1, and more dorsally than S-type sensillum S3. It can respond to a narrow range of bitter stimuli (Weiss et al., 2011). Naming of sensilla is based on figure 2(b) of Hiroi et al., (2002). It corresponds to sensillum I6 in Weiss et al., (2011). Note that Shanbhag et al., (2001) claim 10-13 bristles are present, whilst Hiroi et al., (2002) claim between 12-13.

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S-type sensillum S3 [FBbt_00100048]

Anterior S-type chemosensillum of the labellum. Less dorsally located than S-type sensillum S2. It can respond to a broad range of bitter stimuli (Weiss et al., 2011). Naming of sensilla is based on figure 2(b) of Hiroi et al., (2002). It corresponds to sensillum S2 in Weiss et al., (2011). Note that Shanbhag et al., (2001) claim 10-13 bristles are present, whilst Hiroi et al., (2002) claim between 12-13.

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S-type sensillum S4 [FBbt_00100049]

Fourth most anterior S-type chemosensillum of the labellum. It can respond to a broad range of bitter stimuli (Weiss et al., 2011). Naming of sensilla is based on figure 2(b) of Hiroi et al., (2002). It corresponds to sensillum S3 in Weiss et al., (2011). Sensillum S4 in Weiss et al., (2011) does not correspond to any sensilla of Hiroi et al., (2002). Note that Shanbhag et al., (2001) claim 10-13 bristles are present, whilst Hiroi et al., (2002) claim between 12-13.

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S-type sensillum S6 [FBbt_00100051]

Sixth most anterior S-type chemosensillum of the labellum, located slightly more dorsally than S-type sensillum S5. It can respond to a broad range of bitter stimuli (Weiss et al., 2011). Naming of sensilla is based on figure 2(b) of Hiroi et al., 2002. Note that Shanbhag et al., (2001) claim 10-13 bristles are present, whilst Hiroi et al., (2002) claim between 12-13.

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S-type sensillum S9 [FBbt_00100054]

Ninth most anterior S-type chemosensillum of the labellum, located slightly more dorsally than S-type sensillum S8. Naming of sensilla is based on figure 2(b) of Hiroi et al., 2002. There is no corresponding sensillum described in Weiss et al., (2011). Note that Shanbhag et al., (2001) claim 10-13 bristles are present, whilst Hiroi et al., (2002) claim between 12-13.

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scolopidium [FBbt_00005217]

Sensillum unit of a chordotonal organ, consisting of a cap cell, a ligament cell, a scolopale cell (sheath cell) and the dendrites of one or more sensory neurons. The basal end of the scolopidium is held in place by a ligament cell, usually attached to the integument. The dendrite of each sensory neuron has a cilium projecting from its tip through the scolopale, a rod like structure secreted by the scolopale cell. The cilium terminates in a dendritic cap, embedded in the cap cell. The cap cell is attached to the integument.

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scolopidium 103027 (T1LEG:604480) [VFB_00102e1w]

dually-innervated scolopidium, femoral scolopidium, attaches to distal branch of FeCO medial tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; scolopidium 103027 (T1LEG:604480); female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

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scolopidium 103036 (T1LEG:604522) [VFB_00102e1z]

dually-innervated scolopidium, femoral scolopidium, attaches to distal branch of FeCO medial tendon [scolopidium 103036 (T1LEG:604522); prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

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scolopidium 103041 (T1LEG:604551) [VFB_00102e21]

dually-innervated scolopidium, femoral scolopidium, attaches to distal branch of FeCO medial tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); scolopidium 103041 (T1LEG:604551); is part of; female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

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scolopidium 103046 (T1LEG:604579) [VFB_00102e23]

dually-innervated scolopidium, femoral scolopidium, attaches to distal branch of FeCO medial tendon [prothoracic leg sensillum; scolopidium 103046 (T1LEG:604579); CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

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scolopidium 103051 (T1LEG:604608) [VFB_00102e25]

dually-innervated scolopidium, femoral scolopidium, attaches to distal branch of FeCO medial tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; scolopidium 103051 (T1LEG:604608); VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

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scolopidium 103056 (T1LEG:604634) [VFB_00102e27]

dually-innervated scolopidium, femoral scolopidium, attaches to distal branch of FeCO medial tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; scolopidium 103056 (T1LEG:604634); Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

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scolopidium 103061 (T1LEG:604675) [VFB_00102e2a]

dually-innervated scolopidium, femoral scolopidium, attaches to distal branch of FeCO medial tendon [scolopidium 103061 (T1LEG:604675); prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

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scolopidium 103066 (T1LEG:604715) [VFB_00102e2d]

dually-innervated scolopidium, femoral scolopidium, attaches to distal branch of FeCO medial tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; scolopidium 103066 (T1LEG:604715); VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

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scolopidium 103071 (T1LEG:604770) [VFB_00102e2h]

dually-innervated scolopidium, femoral scolopidium, attaches to distal branch of FeCO medial tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; scolopidium 103071 (T1LEG:604770); female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

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scolopidium 103076 (T1LEG:604811) [VFB_00102e2k]

dually-innervated scolopidium, femoral scolopidium, attaches to distal branch of FeCO medial tendon [prothoracic leg sensillum; scolopidium 103076 (T1LEG:604811); CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

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scolopidium 103081 (T1LEG:604851) [VFB_00102e2n]

dually-innervated scolopidium, femoral scolopidium, attaches to distal branch of FeCO medial tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; scolopidium 103081 (T1LEG:604851); Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

Tags:

scolopidium 103087 (T1LEG:604891) [VFB_00102e2q]

dually-innervated scolopidium, femoral scolopidium, attaches to distal branch of FeCO medial tendon [scolopidium 103087 (T1LEG:604891); prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

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scolopidium 103094 (T1LEG:604904) [VFB_00102e2r]

dually-innervated scolopidium, femoral scolopidium, attaches to distal branch of FeCO medial tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; scolopidium 103094 (T1LEG:604904); VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

Tags:

scolopidium 103099 (T1LEG:604933) [VFB_00102e2t]

dually-innervated scolopidium, femoral scolopidium, attaches to distal branch of FeCO medial tendon [scolopidium 103099 (T1LEG:604933); prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

Tags:

scolopidium 103104 (T1LEG:604961) [VFB_00102e2v]

dually-innervated scolopidium, femoral scolopidium, attaches to distal branch of FeCO medial tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; scolopidium 103104 (T1LEG:604961); Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

Tags:

scolopidium 103111 (T1LEG:604990) [VFB_00102e2x]

dually-innervated scolopidium, femoral scolopidium, attaches to distal branch of FeCO medial tendon [prothoracic leg sensillum; CC-BY_4.0; scolopidium 103111 (T1LEG:604990); X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

Tags:

scolopidium 103150 (T1LEG:605214) [VFB_00102e3d]

dually-innervated scolopidium, femoral scolopidium, attaches to proximal branch of FeCO medial tendon [prothoracic leg sensillum; scolopidium 103150 (T1LEG:605214); CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

Tags:

scolopidium 103155 (T1LEG:605227) [VFB_00102e3e]

dually-innervated scolopidium, femoral scolopidium, attaches to distal branch of FeCO medial tendon [prothoracic leg sensillum; scolopidium 103155 (T1LEG:605227); CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

Tags:

scolopidium 103160 (T1LEG:605267) [VFB_00102e3h]

dually-innervated scolopidium, femoral scolopidium, attaches to distal branch of FeCO medial tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; scolopidium 103160 (T1LEG:605267); female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

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scolopidium 103204 (T1LEG:605467) [VFB_00102e3v]

dually-innervated scolopidium, femoral scolopidium, attaches to distal branch of FeCO medial tendon [prothoracic leg sensillum; CC-BY_4.0; scolopidium 103204 (T1LEG:605467); X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

Tags:

scolopidium 103209 (T1LEG:605480) [VFB_00102e3w]

dually-innervated scolopidium, femoral scolopidium, attaches to distal branch of FeCO medial tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; scolopidium 103209 (T1LEG:605480); female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

Tags:

scolopidium 103229 (T1LEG:605599) [VFB_00102e45]

dually-innervated scolopidium, femoral scolopidium, attaches to distal branch of FeCO medial tendon [prothoracic leg sensillum; CC-BY_4.0; scolopidium 103229 (T1LEG:605599); X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

Tags:

scolopidium 103234 (T1LEG:605652) [VFB_00102e49]

dually-innervated scolopidium, femoral scolopidium, attaches to distal branch of FeCO medial tendon [prothoracic leg sensillum; CC-BY_4.0; scolopidium 103234 (T1LEG:605652); X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

Tags:

scolopidium 103239 (T1LEG:605680) [VFB_00102e4b]

dually-innervated scolopidium, femoral scolopidium, attaches to distal branch of FeCO medial tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); scolopidium 103239 (T1LEG:605680); femoral chordotonal organ scolopidium]

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scolopidium 103244 (T1LEG:605733) [VFB_00102e4f]

dually-innervated scolopidium, femoral scolopidium, attaches to distal branch of FeCO medial tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; scolopidium 103244 (T1LEG:605733); female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

Tags:

scolopidium 103250 (T1LEG:605787) [VFB_00102e4j]

dually-innervated scolopidium, femoral scolopidium, attaches to proximal branch of FeCO medial tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); scolopidium 103250 (T1LEG:605787); femoral chordotonal organ scolopidium]

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scolopidium 103264 (T1LEG:605856) [VFB_00102e4o]

dually-innervated scolopidium, femoral scolopidium, attaches to proximal branch of FeCO medial tendon [prothoracic leg sensillum; CC-BY_4.0; scolopidium 103264 (T1LEG:605856); X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

Tags:

scolopidium 103270 (T1LEG:605909) [VFB_00102e4s]

dually-innervated scolopidium, femoral scolopidium, attaches to proximal branch of FeCO medial tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; Adult T1 Leg (Kuan2020); female organism; scolopidium 103270 (T1LEG:605909); femoral chordotonal organ scolopidium]

Tags:

scolopidium 103276 (T1LEG:605962) [VFB_00102e4w]

dually-innervated scolopidium, femoral scolopidium, attaches to proximal branch of FeCO medial tendon [prothoracic leg sensillum; CC-BY_4.0; scolopidium 103276 (T1LEG:605962); X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

Tags:

scolopidium 103281 (T1LEG:606035) [VFB_00102e51]

dually-innervated scolopidium, femoral scolopidium, attaches to proximal branch of FeCO medial tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; scolopidium 103281 (T1LEG:606035); Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

Tags:

scolopidium 103286 (T1LEG:606100) [VFB_00102e56]

dually-innervated scolopidium, femoral scolopidium, attaches to distal branch of FeCO medial tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; scolopidium 103286 (T1LEG:606100); VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

Tags:

scolopidium 103291 (T1LEG:606113) [VFB_00102e57]

dually-innervated scolopidium, femoral scolopidium, attaches to proximal branch of FeCO medial tendon [prothoracic leg sensillum; scolopidium 103291 (T1LEG:606113); CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

Tags:

scolopidium 103296 (T1LEG:606190) [VFB_00102e5d]

dually-innervated scolopidium, femoral scolopidium, attaches to proximal branch of FeCO medial tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); scolopidium 103296 (T1LEG:606190); femoral chordotonal organ scolopidium]

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scolopidium 103301 (T1LEG:606244) [VFB_00102e5h]

dually-innervated scolopidium, femoral scolopidium, attaches to distal branch of FeCO medial tendon [prothoracic leg sensillum; scolopidium 103301 (T1LEG:606244); CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

Tags:

scolopidium 103306 (T1LEG:606284) [VFB_00102e5k]

dually-innervated scolopidium, femoral scolopidium, attaches to distal branch of FeCO medial tendon [scolopidium 103306 (T1LEG:606284); prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

Tags:

scolopidium 103311 (T1LEG:606348) [VFB_00102e5p]

dually-innervated scolopidium, femoral scolopidium, attaches to proximal branch of FeCO medial tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); scolopidium 103311 (T1LEG:606348); is part of; female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

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scolopidium 103317 (T1LEG:606401) [VFB_00102e5t]

dually-innervated scolopidium, femoral scolopidium, attaches to proximal branch of FeCO medial tendon [prothoracic leg sensillum; CC-BY_4.0; scolopidium 103317 (T1LEG:606401); X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

Tags:

scolopidium 103322 (T1LEG:606438) [VFB_00102e5w]

dually-innervated scolopidium, femoral scolopidium, attaches to proximal branch of FeCO medial tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); scolopidium 103322 (T1LEG:606438); is part of; female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

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scolopidium 103327 (T1LEG:606452) [VFB_00102e5x]

dually-innervated scolopidium, femoral scolopidium, attaches to proximal branch of FeCO medial tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; scolopidium 103327 (T1LEG:606452); Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

Tags:

scolopidium 103332 (T1LEG:606519) [VFB_00102e62]

dually-innervated scolopidium, femoral scolopidium, attaches to proximal branch of FeCO medial tendon [prothoracic leg sensillum; CC-BY_4.0; scolopidium 103332 (T1LEG:606519); X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

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scolopidium 103337 (T1LEG:606589) [VFB_00102e67]

dually-innervated scolopidium, femoral scolopidium, attaches to proximal branch of FeCO medial tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; scolopidium 103337 (T1LEG:606589); female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

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scolopidium 103343 (T1LEG:606614) [VFB_00102e69]

dually-innervated scolopidium, femoral scolopidium, attaches to FeCO lateral tendon [prothoracic leg sensillum; CC-BY_4.0; scolopidium 103343 (T1LEG:606614); X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

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scolopidium 103349 (T1LEG:606670) [VFB_00102e6d]

dually-innervated scolopidium, femoral scolopidium, attaches to FeCO lateral tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; scolopidium 103349 (T1LEG:606670); Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

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scolopidium 103355 (T1LEG:606708) [VFB_00102e6g]

dually-innervated scolopidium, femoral scolopidium, attaches to FeCO lateral tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; scolopidium 103355 (T1LEG:606708); Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

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scolopidium 103361 (T1LEG:606763) [VFB_00102e6k]

dually-innervated scolopidium, femoral scolopidium, attaches to FeCO lateral tendon [scolopidium 103361 (T1LEG:606763); prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

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scolopidium 103367 (T1LEG:606800) [VFB_00102e6n]

dually-innervated scolopidium, femoral scolopidium, attaches to FeCO lateral tendon [prothoracic leg sensillum; CC-BY_4.0; scolopidium 103367 (T1LEG:606800); X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

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scolopidium 103372 (T1LEG:606837) [VFB_00102e6q]

dually-innervated scolopidium, femoral scolopidium, attaches to FeCO lateral tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; scolopidium 103372 (T1LEG:606837); VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

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scolopidium 103377 (T1LEG:606874) [VFB_00102e6t]

dually-innervated scolopidium, femoral scolopidium, attaches to FeCO lateral tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; scolopidium 103377 (T1LEG:606874); female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

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scolopidium 103382 (T1LEG:606911) [VFB_00102e6w]

dually-innervated scolopidium, femoral scolopidium, attaches to FeCO lateral tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; scolopidium 103382 (T1LEG:606911); VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

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scolopidium 103388 (T1LEG:606924) [VFB_00102e6x]

dually-innervated scolopidium, femoral scolopidium, attaches to FeCO lateral tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; scolopidium 103388 (T1LEG:606924); VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

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scolopidium 103394 (T1LEG:606974) [VFB_00102e71]

dually-innervated scolopidium, femoral scolopidium, attaches to FeCO lateral tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); scolopidium 103394 (T1LEG:606974); femoral chordotonal organ scolopidium]

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scolopidium 103399 (T1LEG:607027) [VFB_00102e75]

dually-innervated scolopidium, femoral scolopidium, attaches to FeCO lateral tendon [prothoracic leg sensillum; scolopidium 103399 (T1LEG:607027); CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

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scolopidium 103404 (T1LEG:607077) [VFB_00102e79]

dually-innervated scolopidium, femoral scolopidium, attaches to FeCO lateral tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; scolopidium 103404 (T1LEG:607077); Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

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scolopidium 103415 (T1LEG:607126) [VFB_00102e7d]

dually-innervated scolopidium, femoral scolopidium, attaches to FeCO lateral tendon [prothoracic leg sensillum; CC-BY_4.0; scolopidium 103415 (T1LEG:607126); X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

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scolopidium 103420 (T1LEG:607190) [VFB_00102e7i]

dually-innervated scolopidium, femoral scolopidium, attaches to FeCO lateral tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; scolopidium 103420 (T1LEG:607190); Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

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scolopidium 103425 (T1LEG:607203) [VFB_00102e7j]

dually-innervated scolopidium, femoral scolopidium, attaches to FeCO lateral tendon [scolopidium 103425 (T1LEG:607203); prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

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scolopidium 103430 (T1LEG:607240) [VFB_00102e7m]

dually-innervated scolopidium, femoral scolopidium, attaches to FeCO lateral tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; scolopidium 103430 (T1LEG:607240); VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

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scolopidium 103435 (T1LEG:607277) [VFB_00102e7p]

dually-innervated scolopidium, femoral scolopidium, attaches to FeCO lateral tendon [prothoracic leg sensillum; CC-BY_4.0; scolopidium 103435 (T1LEG:607277); X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

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scolopidium 103440 (T1LEG:607329) [VFB_00102e7t]

dually-innervated scolopidium, femoral scolopidium, attaches to FeCO lateral tendon [prothoracic leg sensillum; scolopidium 103440 (T1LEG:607329); CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

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scolopidium 103445 (T1LEG:607354) [VFB_00102e7v]

dually-innervated scolopidium, femoral scolopidium, attaches to FeCO lateral tendon [prothoracic leg sensillum; CC-BY_4.0; scolopidium 103445 (T1LEG:607354); X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

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scolopidium 103450 (T1LEG:607407) [VFB_00102e7z]

dually-innervated scolopidium, femoral scolopidium, attaches to FeCO lateral tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); scolopidium 103450 (T1LEG:607407); femoral chordotonal organ scolopidium]

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scolopidium 103455 (T1LEG:607438) [VFB_00102e81]

dually-innervated scolopidium, femoral scolopidium, attaches to FeCO lateral tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; scolopidium 103455 (T1LEG:607438); VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

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scolopidium 103461 (T1LEG:607489) [VFB_00102e85]

dually-innervated scolopidium, femoral scolopidium, attaches to FeCO lateral tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); scolopidium 103461 (T1LEG:607489); femoral chordotonal organ scolopidium]

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scolopidium 103466 (T1LEG:607526) [VFB_00102e88]

dually-innervated scolopidium, femoral scolopidium, attaches to FeCO lateral tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); scolopidium 103466 (T1LEG:607526); femoral chordotonal organ scolopidium]

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scolopidium 103471 (T1LEG:607567) [VFB_00102e8b]

dually-innervated scolopidium, femoral scolopidium, attaches to FeCO lateral tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; scolopidium 103471 (T1LEG:607567); Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

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scolopidium 103476 (T1LEG:607608) [VFB_00102e8e]

dually-innervated scolopidium, femoral scolopidium, attaches to FeCO lateral tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; scolopidium 103476 (T1LEG:607608); VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

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scolopidium 103481 (T1LEG:607648) [VFB_00102e8h]

dually-innervated scolopidium, femoral scolopidium, attaches to FeCO lateral tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; scolopidium 103481 (T1LEG:607648); Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

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scolopidium 103486 (T1LEG:607673) [VFB_00102e8j]

dually-innervated scolopidium, femoral scolopidium, attaches to FeCO lateral tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; scolopidium 103486 (T1LEG:607673); VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

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scolopidium 103491 (T1LEG:607726) [VFB_00102e8n]

dually-innervated scolopidium, femoral scolopidium, attaches to FeCO lateral tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; scolopidium 103491 (T1LEG:607726); female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

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scolopidium 103496 (T1LEG:607751) [VFB_00102e8p]

dually-innervated scolopidium, femoral scolopidium, attaches to FeCO lateral tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; scolopidium 103496 (T1LEG:607751); female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

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scolopidium 103501 (T1LEG:607792) [VFB_00102e8s]

dually-innervated scolopidium, femoral scolopidium, attaches to FeCO lateral tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; scolopidium 103501 (T1LEG:607792); female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

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scolopidium 103506 (T1LEG:607830) [VFB_00102e8v]

dually-innervated scolopidium, femoral scolopidium, attaches to FeCO lateral tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; scolopidium 103506 (T1LEG:607830); female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

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scolopidium 103511 (T1LEG:607883) [VFB_00102e8z]

dually-innervated scolopidium, femoral scolopidium, attaches to FeCO lateral tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; scolopidium 103511 (T1LEG:607883); VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

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scolopidium 103516 (T1LEG:607911) [VFB_00102e91]

dually-innervated scolopidium, femoral scolopidium, attaches to FeCO lateral tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; scolopidium 103516 (T1LEG:607911); Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

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scolopidium 120598 (T1LEG:610048) [VFB_00102eda]

neuron 103223, femoral scolopidium, dually-innervated scolopidium, attaches to distal branch of FeCO medial tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; Adult T1 Leg (Kuan2020); female organism; scolopidium 120598 (T1LEG:610048); femoral chordotonal organ scolopidium]

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scolopidium 120611 (T1LEG:610112) [VFB_00102edf]

neuron 103218, femoral scolopidium, dually-innervated scolopidium, attaches to distal branch of FeCO medial tendon [prothoracic leg sensillum; CC-BY_4.0; X-ray computed tomography; Millimeter-scale imaging of a Drosophila leg at single-neuron resolution; VFB CATMAID Adult T1 Leg (T1Leg); is part of; female organism; scolopidium 120611 (T1LEG:610112); Adult T1 Leg (Kuan2020); femoral chordotonal organ scolopidium]

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short labellar taste bristle [FBbt_00007413]

Shortest subclass of taste bristle of the labellum: each bristle is around 15 micrometres long and is curved in the medial direction. These bristles are located in the most medial and ventral regions of the outside labellum. These taste bristles contain the sensory dendrites of 4 gustatory receptor neurons (Shanbhag et al., 2001) sensitive to: sugars; low concentrations of salt; bitter or high salt concentrations; water or low osmolarity (Meunier et al., 2003; Fujishiro et al., 1984).These taste bristles also contains the sensory dendrite of one mechanosensory neuron (Shanbhag et al., 2001).

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small basiconic sensillum [FBbt_00005186]

The smallest subtype of basiconic sensilla. It measures around 9 micrometers in length and around 1.7 micrometers in width at the base. It shows slight tapering towards the tip. The cuticular wall is 100-200nm thick and contains pores or around 40nm wide. Except for the base, the pores are arranged in longitudinal rows, with 80nm between pores and 200nm between parallel rows. It is innervated by two sensory neurons. Small basiconic sensillum are found in the antennal segment 3.

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small basiconic sensillum of antennal segment 3 [FBbt_00004176]

Small olfactory basiconic sensillum on antennal segment 3. The surface of the sensillum is perforated by longitudinal rows of pores, connecting to a lymph space innervated by 2 branched olfactory receptor neuron dendrites. Morphology is consistent with these sensilla being olfactory (Shanbhag et al., 1999). This function has been directly confirmed by electrophysiology (Clyne et al., 1997).

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small chordotonal organ of scabellum [FBbt_00004412]

Small chordotonal organ of the base of the haltere, that spans the this region transversely. Original reference for these (FlyBase:FBrf0239028) is based on other flies. Chordotonal organs were not identified in Drosophila halteres by Tsubouchi et al. (2017) (FlyBase:FBrf0237124) [FBC:CP].

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spot sensillum of dorso-lateral group [FBbt_00002681]

Pit sensillum located in the dorso-lateral group of the terminal organ, on the head of the embryo/larva, located next to the dorsolateral papilla. It resembles a small pit, and houses a single dendrite that has a tubular body, indicative of mechanosensation (Rist and Thum, 2017). The bipolar neuron that innervates this sensillum has its cell body in the terminal organ ganglion.

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terminal organ [FBbt_00002690]

External compound sense organ of the antenno-maxillary complex of the larval head consisting of a distal group of 11 sensilla and a dorso-lateral group of 3 sensilla. This organ is innervated by gustatory receptor neurons that fasciculate with either the larval maxillary nerve (for the dorso-lateral group) or the larval antennal nerve (for the distal group) and terminate in area 2 of the subesophageal ganglion.

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trichoid sensillum [FBbt_00005184]

A sensillum of which the external part is a seta. Note that there is some variation in usage of this term throughout entomology, with some sources using it to refer to any sensillum with a hair or bristle cuticular specialization (e.g. see Chapman, 1998 FBrf0239230). Among the Dmel model organism community it is only used for the smallest of hairs/bristle, with sensilla with larger, thicker cuticular specializations being referred to as chaetae. We follow this usage. It should be noted, however, that there is no clear dividing line between macrochaeta and microchaeta or between microchaeta and trichoid sensillum.

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trichoid sensillum of antennal segment 3 [FBbt_00004173]

Olfactory sensillum of antennal segment 3 whose external sensory part is a sharply pointed hair arising from a conspicuous cylindrical base. The walls of the hair are perforated by irregularly distributed pores connecting to a lymph filled lumen containing 1-3 ORN dendrites, unbranched except occasionally near the hair tip. Morphology is consistent with these sensilla being olfactory (Shanbhag et al., 1999). This function has been directly confirmed by electrophysiology (Clyne et al., 1997).

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twin sensillum of margin 1 [FBbt_00004338]

One of two large campaniform sensilla at the most distal point of the wing margin of the distal costa. It is innervated by the first born of the twin sensilla neurons. This sensillum was classed as a bristle; however, both the initial reference (Murray et al., 1984) and a recent comprehensive study (Dinges et al., 2020) unambiguously describe it as a campaniform sensillum. [FlyBase:FBrf0247616]

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twin sensillum of margin 2 [FBbt_00004339]

One of two large campaniform sensilla at the most distal point of the wing margin of the distal costa. It is innervated by the second born of the twin sensilla neurons (Murray et al., 1984). This sensillum was classed as a bristle; however, both the initial reference (Murray et al., 1984) and a recent comprehensive study (Dinges et al., 2020) unambiguously describe it as a campaniform sensillum. [FlyBase:FBrf0247616]

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ventral cibarial sense organ [FBbt_00004143]

Ventral-most cibarial gustatory sense organ near the upper end of the posterior cibarial plate of the adult pharynx, and innervated by the pharyngeal nerve (Demerec, 1994; Nayak and Singh, 1983). It is flanked distally and proximally by the ventral row bristles and the dorsal row bristles, respectively. It comprises three sensilla (distal, middle and proximal), containing in total about 8 gustatory receptor neurons. Nayak & Singh (1983) claim the ventral cibarial sense organ is composed of two sensilla: the ventral and the dorsal sensilla. In contrast, Montell (2009), Vosshall & Stocker (2007), and Stocker & Schorderet (1981) report three sensilla: the proximal, the middle and the distal sensilla. This is shown via enhancer trap activity in Gendre et al., 1994. We follow the report of three sensilla. Similarly, the number of chemosensory neurons varies: both Nayak & Singh (1983), and Stocker (1994) report 6, whilst Gendre et al., (1994), Montell (2009), and Vosshall & Stocker (2007) report 8. We follow the latter.

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ventral occipital bristle [FBbt_00052804]

Bristle of the ventral posterior head, ventrolateral to the neck and medial to the ventral postorbital bristles (Eichler et al., 2023). There are approximately 15 of these on each side (Eichler et al., 2023). Based on position and numbers, this group in Eichler et al. (2023) appears to include the postgenal bristles, postgenal trichoid sensilla and the proximal rostral trichoid sensilla from Haynie and Bryant (1986).

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ventral organ [FBbt_00002707]

External compound sense organ of the antenno-maxillary complex of the larval head, located amongst the cirri. It contains three ‘knob-like’ sensilla, one bi-dendritic and two mono-dendritic. Neurons of the ventral organ connect with the larval maxillary nerve and terminate in area 2 of the subesophageal ganglion. Evidence for maxillary segment origin comes from Schmidt-Ott et al., 1994. There is some disagreement about the number of sensilla in the ventral organ: Campos-Ortega and Hartenstein, 1997, mention only 3 - one with two neurons and the other two with one each; Singh and Singh, 1984, provide evidence for 5 sensilla, 4 innervated by one neuron, the other by four neurons. This ontology follows Singh and Singh, 1984.

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ventral pedicellar campaniform sensillum [FBbt_00004416]

A campaniform sensillum that is one of around 46 sensilla arranged in 10 transverse rows on the ventral side of the pedicel. It is elliptical with a low profile and socket (type 5). The central cuticular specialization has a raised profile, and the sockets are fused to the sockets of adjacent sensilla in the same row. It is around 3.5-4 micrometers in length.

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ventral row bristle of the cibarium [FBbt_00004138]

One of 12-15 singly innervated small bristles of the ventral row of the cibarial fish-trap bristle, ventral to the ventral cibarial sense organ. They are innervated by mechanosensory neurons. Disambiguation: these bristles are sometimes referred to as the ‘ventral row’ (Stocker and Schorderet, 1981; Nayak and Singh, 1983), which may be confused with the ‘ventral row’ sensilla of the anterior wing margin (Bate and Martinez Arias, 1991). Also referred to as the lower/distal fishtrap bristles (Gendre et al., 2004).

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Wheeler\'s organ [FBbt_00004807]

A chordotonal organ associated with the anterior of abdominal sternite 2. It is visible externally as a raised patch of smooth cuticle without trichomes or bristles. It consists of two clusters of scolopidia (FBbt:00005217), one on either side of the ventral midline (Smith and Shepherd, 1996). The sensory neurons of Wheeler’s organ project through the second segmental nerve of the abdomen and then through the abdominal neuromeres via dorso-lateral tract of the ventral fasciculus (DLV), to terminate in the prothoracic neuromere (Smith and Shepherd, 1996).

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yellow ommatidium [FBbt_02000001]

Ommatidial subtype with stochastic distribution throughout the retina making up about 70% of all ommatidia. This ommatidial subtype is specialized to detect longer wavelengths (far UV + green). The yellow ommatidium expresses the far ultraviolet-specific opsin Rh4 (FBgn0003250) in photoreceptor R7 cells and the green-sensitive Rh6 (FBgn0019940) in photoreceptor R8 cells (Wernet and Desplan, 2004).

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