FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term adult ellipsoid body extrinsic ring neuron ID (Ontology) FBbt:00003654 (Fly Anatomy)
Definition Ring neuron with extensive arborizations outside of the ellipsoid body (Hanesch et al., 1989; Omoto et al., 2018). Unlike the R-neurons, these neurons do not develop from neuroblast DALv2 (Omoto et al., 2018), and some of these cells are derived from each of BAmv1, DM6, DM4, and DM3 (Kandimalla et al., 2023). There are usually only one or two of each type of extrinsic ring neuron per hemisphere (Hulse et al., 2021).[ FlyBase:FBrf0049409 FlyBase:FBrf0240929 FlyBase:FBrf0254510 FlyBase:FBrf0257023 ]
Also Known As "ExR" ; "ExR-neuron" ; "extrinsic ring neuron"
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VFB:FBbt_00003654
Annotations
Records annotated with this term OR any of its CHILD TERMS
Records annotated with this exact term (annotations to child terms are NOT included)
Data Class Field Records
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION       2
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 adult ellipsoid body extrinsic ring neuron (all annotations which use CV term, excluding "NOT" statements)       2      1
Spanning Tree (Parents/Children)
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  large field neuron of the central complex
   |__adult ellipsoid body ring neuron
       |__adult ellipsoid body extrinsic ring neuron  36 rec.
           |__adult ellipsoid body extrinsic ring neuron ExR1 5 rec.
           |   |__adult ExR1 neuron of DM3 lineage
           |   |__adult ExR1 neuron of DM4 lineage
           |__adult ellipsoid body extrinsic ring neuron ExR3
           |__adult ellipsoid body extrinsic ring neuron ExR4
           |__adult ellipsoid body extrinsic ring neuron ExR5
           |__adult ellipsoid body extrinsic ring neuron ExR6
           |__adult ellipsoid body extrinsic ring neuron ExR7
           |   |__adult ExR7 neuron of DM3 lineage
           |   |__adult ExR7 neuron of DM4 lineage
           |__adult ellipsoid body extrinsic ring neuron ExR8
           |   |__adult ExR8 neuron of DM3 lineage
           |   |__adult ExR8 neuron of DM4 lineage
           |__EB neuron of the dopaminergic PPM3 cluster 28 rec.
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Is a adult ellipsoid body ring neuron
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VFB:FBbt_00003654