Adult histaminergic neuron with its cell body in the abdominal neuromere (Nassel et al., 1990). There are 12 of these cells per organism and their somas are located ventrally (Nassel et al., 1990).
Adult histaminergic neuron with its soma in the ventral nerve cord and an ascending projection through the cervical connective (Cheong et al., 2023). There are two pairs of these per organism, with somas in the metathoracic and mesothoracic neuromeres (Cheong et al., 2023).
Histaminergic neuron whose cell body is located in one of two (bilateral) clusters in the adult dorsal medial protocerebrum. It is the most dorsal of the histaminergic neuron clusters. There are 3 neurons in each cluster.
Histaminergic neuron whose cell body is located in one of two (bilateral) clusters in the adult lateral protocerebrum. It is the most lateral of the histaminergic neuron clusters. There are 3 neurons in each cluster.
Histaminergic neuron whose cell body is located in one of two (bilateral) clusters in the adult ventral protocerebrum which innervates the lobula in both hemispheres. It is the most ventral of the histaminergic neuron clusters in the protocerebrum. There are 2 neurons in each cluster.
Histaminergic neuron whose cell body is located in the dorsal protocerebrum, ventral and lateral to the histaminergic HP1 cluster. There is one neuron in each hemisphere.
Histaminergic neuron whose cell body is located in subesophageal zone of the adult brain, ventral and lateral to the histaminergic HP3 cluster. There is one neuron in each hemisphere.
Any histaminergic neuron of the adult.
Adult histaminergic neuron with its soma in the ventral nerve cord and an ascending projection through contralateral side of the cervical connective (Cheong et al., 2024). There are two pairs of these per organism, with somas in the metathoracic and mesothoracic neuromeres (Cheong et al., 2024). They receive the majority of their input from descending neurons (Cheong et al., 2024).
Any eye photoreceptor cell (FBbt:00006009) that is part of some dorsal margin ommatidium (FBbt:02000000).
Photoreceptor cell that forms the core of each ommatidium in the adult eye. Eight of these photoreceptors are arranged in each ommatidial core, bundled like the staves of a barrel. Each has a photosensitive rhabdomere that projects into the barrel cavity and adjacent supporting membrane, the stalk (Wolff and Ready, 1993). Each extends an axon into the optic lobe. Activation of the photoreceptor by light results in depolarization and in histamine release at the synapses of these axons (Sarthy, 1991).
Eye photoreceptor cell whose rhabdomere is located in the center of each ommatidium.
Any histaminergic neuron of the larva.
Adult histaminergic neuron with its cell body in the mesothoracic neuromere (Nassel et al., 1990). There is one of these cells on each side and its soma is located ventrally (Nassel et al., 1990). It has an axon that runs dorsally and anteriorly, entering the cervical connective (Nassel et al., 1990; Cheong et al., 2024). It arborizes bilaterally in the ventral nerve cord and in the brain (Cheong et al., 2024). It receives most of its input in the wing neuropil and intermediate tectulum (Cheong et al., 2024). Its presynapses are found throughout the pro- and meso-thoracic neuromeres as well as in the subesophageal zone, saddle and posterior slope (Cheong et al., 2024).
Adult histaminergic neuron with its cell body in the metathoracic neuromere (Nassel et al., 1990). There are one or two of these cells on each side and their somas are located ventrally and posteriorly, near the border with the abdominal neuromere (Nassel et al., 1990; Cheong et al., 2024). It has an axon that runs dorsally and anteriorly, entering the cervical connective (Nassel et al., 1990; Cheong et al., 2024). Its arbors are mainly found in the contralateral central nervous system (Cheong et al., 2024). Its input is mainly from the intermediate tectulum of the meso- and meta-thoracic neuromeres and it outputs to all three contralateral leg neuropils, the dorsal gnathal ganglion and the antennal mechanosensory and motor center (Cheong et al., 2024).
An eye photoreceptor cell whose rhabdomere is part of the outer trapezoid of rhabdomeres of each ommatidium. There are six of these per ommatidium. Each has a single axon that projects along a single lamina optic cartridge within which it makes extensive synaptic connections before terminating in the proximal lamina. It is strongly presynaptic to lamina monopolar neurons L1 and L2 and the lamina intrinsic (amacrine) neuron (Rivera-Alba et al., 2011).
Photoreceptor cell R7 that is part of a pale ommatidium and expresses Rhodopsin 3 (Wernet and Desplan, 2004). It outputs to Dm8 neurons in medulla layer M6 (Gao et al., 2008; Sancer et al., 2019). It receives synaptic input from photoreceptor cell R8 of the same column (Takemura et al., 2008; Takemura et al., 2015), mostly in M3 (Takemura et al., 2008).
Photoreceptor cell R8 that is part of a pale ommatidium and expresses Rhodopsin 5 (Wernet and Desplan, 2004). It outputs to TM5c, mostly in layer M3 where it terminates, but also in M1-2 (Karuppudurai et al., 2014) and to Tm20, Mi1, Mi4 and some lamina monopolar neurons of the same column (Takemura et al., 2015). It also outputs onto photoreceptor cell R7 of the same column (Takemura et al., 2008; Takemura et al., 2015), mostly in M3 (Takemura et al., 2008).
Outer photoreceptor cell of the adult eye whose rhabdomere is located at the right angle vertex of the longer of the two parallel sides of the trapezoid of rhabdomeres in each ommatidium. It has a single axon that projects along a single lamina optic cartridge (Fischbach and Dittrich, 1989; Wolff and Ready, 1993).
Outer photoreceptor cell of the adult eye whose rhabdomere is located in the middle of the longer of the two parallel sides of the trapezoid of rhabdomeres in each ommatidium. It has a single axon that projects along a single lamina optic cartridge (Fischbach and Dittrich, 1989; Wolff and Ready, 1993).
Outer photoreceptor cell of the adult eye whose rhabdomere is located at the non-right angled vertex of the longer of two parallel sides of the trapezoid of rhabdomeres in each ommatidium. It has a single axon that projects along a single lamina optic cartridge (Fischbach and Dittrich, 1989; Wolff and Ready, 1993).
Outer photoreceptor cell of the adult eye whose rhabdomere is located in the middle of the longer of the two non-parallel sides of trapezoid of rhabdomeres in each ommatidium, in between the rhabdomeres of R3 and R5. It has a single axon that projects along a single lamina optic cartridge (Fischbach and Dittrich, 1989; Wolff and Ready, 1993).
Outer photoreceptor cell of the adult eye whose rhabdomere is located at a non-right angle vertex of the shorter of the two parallel sides of the trapezoid of rhabdomeres in each ommatidium. It has a single axon that projects along a single lamina optic cartridge (Fischbach and Dittrich, 1989; Wolff and Ready, 1993).
Outer photoreceptor cell of the adult eye whose rhabdomere is located at the right angle vertex of the shorter of the two parallel sides of the trapezoid of rhabdomeres in each ommatidium. It has a single axon that projects along a single lamina optic cartridge (Fischbach and Dittrich, 1989; Wolff and Ready, 1993).
Inner photoreceptor cell of the ommatidium whose rhabdomere is located distally, directly above that of R8 (Wernet and Desplan, 2004). It has a single axon that extends through a single column of the lamina without making synapses (Fischbach and Dittrich, 1989). This axon crosses the first optic chiasm and extends through a single column of the medulla where it makes pre-synaptic contacts, mainly in medulla layers M1 and M5 (Takemura et al., 2008), before terminating in M6 (Gao et al., 2008; Sancer et al., 2019). It forms reciprocal inhibitory histaminergic synapses with the R8 photoreceptor of the same optic column (Schnaitmann et al., 2018), with a large proportion in the first optic chiasm (Kind et al., 2021).
R7 photoreceptor of the dorsal rim area of the retina. It expresses the UV-detecting Rhodopsin 3 and extends to medulla layer M6, where it synapses to Dm-DRA1, but not Dm8 (Sancer et al., 2019).
Inner photoreceptor cell of the ommatidium whose rhabdomere is located proximally, directly below that of R7 (Wernet and Desplan, 2004). It has a single axon that extends through a single column of the lamina without making synapses and crosses the first optic chiasm to reach the medulla (Fischbach and Dittrich, 1989). It forms reciprocal inhibitory histaminergic synapses with the R8 photoreceptor of the same optic column (Schnaitmann et al., 2018), with a large proportion in the first optic chiasm (Kind et al., 2021). It is also cholinergic (Davis et al., 2020).
R8 photoreceptor of the dorsal rim area of the retina. It expresses the UV-detecting Rhodopsin 3 and extends to medulla layer M6, where it synapses to Dm-DRA2 (Sancer et al., 2019). In expression and morphology it is more similar to R7 cells than other R8 cells (Sancer et al., 2019).
Photoreceptor cell R7 that is part of a yellow ommatidium and expresses Rhodopsin 4 (Wernet and Desplan, 2004). It outputs to transmedullary neuron Tm5a (Gao et al., 2008; Karuppudurai et al., 2014) and to Dm8 neurons in medulla layer M6 (Gao et al., 2008; Sancer et al., 2019). It receives synaptic input from photoreceptor cell R8 of the same column (Takemura et al., 2008; Takemura et al., 2015), mostly in M3 (Takemura et al., 2008).
Photoreceptor cell R8 that is part of a yellow ommatidium and expresses Rhodopsin 6 (Wernet and Desplan, 2004). It outputs to TM5c, mostly in layer M3 where it terminates, but also in M1-2 (Karuppudurai et al., 2014) and to Tm20, Mi1, Mi4 and some lamina monopolar neurons of the same column (Takemura et al., 2015). It also outputs onto photoreceptor cell R7 of the same column (Takemura et al., 2008; Takemura et al., 2015), mostly in M3 (Takemura et al., 2008).