FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term larval DA3 motor neuron ID (Ontology) FBbt:00110231 (Fly Anatomy)
Definition Larval motor neuron that innervates dorsal acute muscle 3 (muscle 3) via type Ib synapses (Landgraf et al., 1997; Hoang and Chiba, 2001; Meng et al., 2019). It is the fourth-born U neuron, developing from the fifth ganglion mother cell that differentiates from neuroblast NB7-1 (Seroka et al., 2020). It has a monopolar morphology and its dendrites remain ipsilateral (Seroka and Doe, 2019; Meng et al., 2019).[ FlyBase:FBrf0064795 FlyBase:FBrf0099344 FlyBase:FBrf0112030 FlyBase:FBrf0132289 FlyBase:FBrf0190540 FlyBase:FBrf0208790 FlyBase:FBrf0241992 FlyBase:FBrf0243538 FlyBase:FBrf0246311 ]
Also Known As"MN-DA3 neuron" ; "MN3-Ib" ; "U4 motor neuron" (for all, see Synonyms field below)
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VFB:FBbt_00110231
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Data ClassFieldDirect annotations
Alleles (FBal)PHENOTYPE_MANIFEST_IN
Insertions (FBti)EXPRESSION_STAGE_TISSUE_POSITION
Insertions (FBti)PHENOTYPE_MANIFEST_IN
Constructs (FBtp)PHENOTYPE_MANIFEST_IN
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Relevant FlyBase reports
 Alleles Genes Insertions Constructs
 larval DA3 motor neuron (all annotations which use CV term, excluding "NOT" statements)
     larval DA3 motor neuron | embryonic stage | increased number
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     larval DA3 motor neuron | increased number
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lineage NB7-1 primary motor neuron
 |__U neuron_______________________________
motor neuron                               |
 |__type Ib motor neuron___________________|
embryonic/larval motor neuron              |
 |__U neuron_______________________________|
 |__larval internal muscle motor neuron____|
NB7-1 Notch ON hemilineage primary neuron  |
 |__U neuron_______________________________|
                                           larval DA3 motor neuron  22 rec.
                                            |__larval A1-7-innervating DA3 motor neuron 1 rec.
                                                |__larval DA3 motor neuron of abdominal 1 neuromere
                                                |__larval DA3 motor neuron of abdominal 2 neuromere
                                                |__larval DA3 motor neuron of abdominal 3 neuromere
                                                |__larval DA3 motor neuron of abdominal 4 neuromere
                                                |__larval DA3 motor neuron of abdominal 5 neuromere
                                                |__larval DA3 motor neuron of abdominal 6 neuromere
                                                |__larval DA3 motor neuron of metathoracic neuromere
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Is a U neuron
type Ib motor neuron
larval internal muscle motor neuron
Develops from ganglion mother cell GMC7-1e
Part of
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VFB:FBbt_00110231