FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term larval DA1 motor neuron ID (Ontology) FBbt:00001447 (Fly Anatomy)
Definition Motor neuron that is born from the first GMC to bud from neuroblast NB1-1 (GMC1-1a) in thoracic and abdominal segments and is part of the Notch OFF hemilineage (Skeath and Doe, 1998). It has a large round cell body that sits at the dorsal surface of the CNS, in the next anterior segment to the muscle it innervates, just posterior to the posterior commissure and longitudinal connective (Schmid et al., 1999; Zarin and Labrador, 2019). It innervates dorsal acute muscle 1 (DA1; muscle 1) (Landgraf et al., 1997). It expresses even-skipped (Manning et al., 2012).[ FlyBase:FBrf0064795 FlyBase:FBrf0099344 FlyBase:FBrf0102831 FlyBase:FBrf0112030 FlyBase:FBrf0219785 FlyBase:FBrf0245882 ]
Also Known As "aCC motoneuron" ; "aCC neuron" ; "anterior corner cell" (for all, see Synonyms field below)
Comment Not present in MN neuromere (lack of NB1-1) or LB neuromere (apoptosis of precursor) or MX neuromere (precursor cell appears to differentiate into a different type) (Rickert et al., 2018 - FBrf0238045). Present in A8 and A9 (Birkholz et al., 2013 - FBrf0221210).
Links to External Ontologies
VFB:FBbt_00001447
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
Alleles (FBal)  PHENOTYPE_MANIFEST_IN     117
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION      12
Insertions (FBti)  PHENOTYPE_MANIFEST_IN       8
Constructs (FBtp)  PHENOTYPE_MANIFEST_IN      58
show Full annotation statements including this term (annotations to child terms are NOT included), and relevant FlyBase records
 Full annotation statements 
Relevant FlyBase reports
 Alleles Genes Insertions Constructs
 larval DA1 motor neuron (all annotations which use CV term, excluding "NOT" statements)     118     26     20     64
     larval DA1 motor neuron | decreased number | third instar larval stage       1       --       1       --
     larval DA1 motor neuron | ectopic       4       --       --       3
     larval DA1 motor neuron | ectopic | somatic clone       4       --       1      1
     larval DA1 motor neuron | embryonic stage      19       --       1     13
     larval DA1 motor neuron | embryonic stage 11 | increased number       2       --       --       --
     larval DA1 motor neuron | embryonic stage 12 | increased number       2       --       --       --
     larval DA1 motor neuron | embryonic stage 16       1       --       --       --
     larval DA1 motor neuron | germline clone       2       --       --       --
     larval DA1 motor neuron | heat sensitive       4       --       --       2
     larval DA1 motor neuron | larval stage       4       --       --       3
     larval DA1 motor neuron | precursor       3       --       2       --
     larval DA1 motor neuron | somatic clone | increased number       2       --       --       --
     larval DA1 motor neuron | third instar larval stage       3       --       --       3
Spanning Tree (Parents/Children)
Only view relationship: 
motor neuron
 |__type Ib motor neuron__________________
embryonic/larval motor neuron             |
 |__larval internal muscle motor neuron___|
primary neuron                            |
 |__Notch OFF hemilineage primary neuron__|
NB1-1 lineage primary neuron              |
 |__lineage NB1-1 primary motor neuron____|
Notch OFF hemilineage neuron              |
 |__Notch OFF hemilineage primary neuron__|
primary motor neuron                      |
 |__lineage NB1-1 primary motor neuron____|
                                          larval DA1 motor neuron  229 rec.
                                           |__larval A1-7-innervating DA1 motor neuron 4 rec.
                                           |   |__larval DA1 motor neuron of abdominal 1 neuromere
                                           |   |__larval DA1 motor neuron of abdominal 2 neuromere
                                           |   |__larval DA1 motor neuron of abdominal 3 neuromere
                                           |   |__larval DA1 motor neuron of abdominal 4 neuromere
                                           |   |__larval DA1 motor neuron of abdominal 5 neuromere
                                           |   |__larval DA1 motor neuron of abdominal 6 neuromere
                                           |   |__larval DA1 motor neuron of metathoracic neuromere
                                           |__larval DA1 motor neuron of mesothoracic neuromere
                                           |__larval DA1 motor neuron of prothoracic neuromere
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Is a type Ib motor neuron
lineage NB1-1 primary motor neuron
Notch OFF hemilineage primary neuron
larval internal muscle motor neuron
Develops from ganglion mother cell GMC1-1a
Part of
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Synonyms
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VFB:FBbt_00001447