FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term transmedullary neuron Tm15 ID (Ontology) FBbt:00003803 (Fly Anatomy)
Definition Transmedullary neuron that terminates in lobula layer 5 with both fine and bleb-type arborizations. It displays fine arborizations in medulla layers M2, M3, M4, M5 and M10, and has bleb-type arborizations in layers M3 and M8. It is a cholinergic neuron (Varija Raghu et al., 2011).[ FlyBase:FBrf0049410 FlyBase:FBrf0212356 ]
Also Known As"Tm15"
CommentThe neurotransmitter was assessed by co-labelling cells with a Cha-GAL4.7.4 driver (FBtp0014830) and an anti-ChAT antibody (Varija Raghu et al., 2011). Pre- versus postsynaptic innervation judged by scoring of terminal morphology from figures in Fischbach and Dittrich (1989) as assessed by FlyBrain Neuron DB. Might be a variant/subtype of Tm20 (Nern et al., 2025 - FBrf0262545).
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VFB:FBbt_00003803
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 transmedullary neuron Tm15 (all annotations which use CV term, excluding "NOT" statements)
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cholinergic neuron
 |__adult cholinergic neuron__________
optic lobe intrinsic columnar neuron  |
 |__transmedullary neuron_____________|
adult neuron                          |
 |__adult cholinergic neuron__________|
                                      transmedullary neuron Tm15  1 rec.
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Is a transmedullary neuron
adult cholinergic neuron
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  • "Tm15" EXACT VFB_SYMBOL
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FlyBrain_NDB:10138
VFB:FBbt_00003803