FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term adult ellipsoid body ring neuron R1 ID (Ontology) FBbt:00003650 (Fly Anatomy)
Definition R-neuron that passes through the ellipsoid body canal, entering the neuropil from the posterior part of the canal and projecting outwards and slightly anteriorly (Omoto et al., 2018). Its terminals define the boundary between the inner and outer posterior layers of the ellipsoid body (Omoto et al., 2018). Unlike most other R-neurons, its dendritic branches are found on the lateral surface of the lateral accessory lobe, rather than the bulb (Omoto et al., 2018).[ FlyBase:FBrf0111476 FlyBase:FBrf0240929 ]
Also Known As"ebR1" ; "ER1" ; "R1 neuron"
CommentThis R1 neuron, identified by Renn et al, (1999), is now thought to be distinct from the R1 neuron identified by Hanesch et al. (1989), which is most likely one of the R3 neurons (Omoto et al., 2018). Ofstad et al. (2011) use two drivers stated to target R1 neurons, both of which were shown to target subclasses of R3, and not R1, by Omoto et al. (2018).
Links to External Ontologies
VFB:FBbt_00003650
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Insertions (FBti)EXPRESSION_STAGE_TISSUE_POSITION
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 adult ellipsoid body ring neuron R1 (all annotations which use CV term, excluding "NOT" statements)
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adult ellipsoid body ring neuron__
secondary neuron__________________|
adult EBa1 lineage neuron_________|
adult GABAergic neuron____________|
                                  adult ellipsoid body R-neuron
                                   |__adult ellipsoid body ring neuron R1  28 rec.
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FlyBrain_NDB:10260
VFB:FBbt_00003650