FB2026_03 , released September 17, 2026
FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term distal medullary amacrine neuron Dm1 ID (Ontology) FBbt:00003768 (Fly Anatomy)
Definition Distal medullary wide-field amacrine neuron whose cell body is located in the anterior region of the cell body rind of the medulla. It branches extensively at the distal surface of the medulla forming a moderately broad arbor with each branch making a distinctive bouton-like terminal in the region between M1 and M2 (in the same sublayer as Dm18, and more proximal than Dm9 and Dm10 in M1), from which short, fine terminal branches project (Morante and Desplan, 2008; Fischbach and Dittrich, 1989). The arbor varies in shape between cells, covering around 20-30 columns, but with these areas overlapping. The size of the terminals of Dm1 is smaller than those of Dm18. There are around 40 Dm1 neurons per hemisphere. They are glutamatergic (Davis et al., 2020).[ FlyBase:FBrf0049410 FlyBase:FBrf0204652 FlyBase:FBrf0228639 FlyBase:FBrf0244935 ]
Also Known As "Dm1"
Comment Pre- versus postsynaptic innervation judged by scoring of terminal morphology from figures in Fischbach and Dittrich (1989) as assessed by FlyBrain Neuron DB.
Links to External Ontologies
VFB:FBbt_00003768
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Data ClassFieldDirect annotations
Alleles (FBal)PHENOTYPE_MANIFEST_IN
Insertions (FBti)EXPRESSION_STAGE_TISSUE_POSITION
Insertions (FBti)PHENOTYPE_MANIFEST_IN
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 distal medullary amacrine neuron Dm1 (all annotations which use CV term, excluding "NOT" statements)
     distal medullary amacrine neuron Dm1 | adult stage | decreased number
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adult optic lobe neuron
 |__distal medullary amacrine neuron________
optic lobe amacrine neuron                  |
 |__distal medullary amacrine neuron________|
adult neuron                                |
 |__adult glutamatergic neuron______________|
secondary neuron                            |
 |__Notch OFF hemilineage secondary neuron__|
Notch OFF hemilineage neuron                |
 |__Notch OFF hemilineage secondary neuron__|
medulla intrinsic neuron                    |
 |__distal medullary amacrine neuron________|
glutamatergic neuron                        |
 |__adult glutamatergic neuron______________|
                                            distal medullary amacrine neuron Dm1  17 rec.
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Is a distal medullary amacrine neuron
Notch OFF hemilineage secondary neuron
adult glutamatergic neuron
Develops from immature distal medullary amacrine neuron Dm1
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FlyBrain_NDB:10081
VFB:FBbt_00003768