FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term adult ellipsoid body extrinsic ring neuron ExR1 ID (Ontology) FBbt:00003655 (Fly Anatomy)
Definition Extrinsic ring neuron with a large soma located in the pars intercerebralis (Hanesch et al., 1989; Young and Armstrong, 2010). It follows the medial equatorial fascicle (Omoto et al., 2018) and arborizes in the dorsal fan-shaped body (FB), lateral accessory lobe (LAL) and bulb (Young and Armstrong, 2010; Omoto et al., 2018; Hulse et al., 2021). Its main projection then encircles the ellipsoid body (EB) and sends multiple evenly spaced projections that arborize in the inner central and anterior domains of the EB (Young and Armstrong, 2010; Omoto et al., 2018). Arborizations are mainly postsynaptic in the LAL (including the gall) and bulb, and mixed in the ellipsoid body and fan-shaped body (Hulse et al., 2021). There are two of these cells per hemisphere, one that develops from neuroblast DM3, and one that develops from DM4 (Kandimalla et al., 2023).[ FlyBase:FBrf0049409 FlyBase:FBrf0210154 FlyBase:FBrf0240929 FlyBase:FBrf0254510 FlyBase:FBrf0257023 ]
Also Known As"ExR1"
CommentSites inferred to be presynaptic by localization of fluorescently tagged synaptobrevin and to be post-synaptic by localization of fluorescently tagged DSCAM (Young and Armstrong, 2010).
Links to External Ontologies
VFB:FBbt_00003655
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Insertions (FBti)EXPRESSION_STAGE_TISSUE_POSITION
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 adult ellipsoid body extrinsic ring neuron ExR1 (all annotations which use CV term, excluding "NOT" statements)
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adult ellipsoid body ring neuron
 |__adult ellipsoid body extrinsic ring neuron__
CNS neuron                                      |
 |__supraesophageal ganglion neuron_____________|
                                                adult ellipsoid body extrinsic ring neuron ExR1  5 rec.
                                                 |__adult ExR1 neuron of DM3 lineage
                                                 |__adult ExR1 neuron of DM4 lineage
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Is a supraesophageal ganglion neuron
adult ellipsoid body extrinsic ring neuron
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FlyBrain_NDB:10264
VFB:FBbt_00003655