FB2026_03 , released September 17, 2026
FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term embryonic GW neuron ID (Ontology) FBbt:00001586 (Fly Anatomy)
Definition Embryonic motor neuron precursor that develops from the first ganglion mother cell in the 7-3 lineage (GMC 7-3a) (Higashijima et al., 1996; Isshiki et al., 2001) and is the Notch ON descendent of this GMC (Lee and Lundell, 2007). One of these cells is produced in each thoracic, abdominal (A1-A8) and labial hemisegment (Higashijima et al., 1996; Rogulja-Ortmann et al., 2007; Rickert et al., 2018). It only develops into a larval neuron in segments S3-T2, in more posterior segments it undergoes programmed cell death (Rogulja-Ortmann et al., 2007; Rickert et al., 2018).[ FlyBase:FBrf0086454 FlyBase:FBrf0112030 FlyBase:FBrf0138252 FlyBase:FBrf0194301 FlyBase:FBrf0200999 FlyBase:FBrf0238045 ]
Also Known As "embryonic 7-3M"
Comment According to Schmid et al. (1999) this motorneuron projects out of the posterior root of the ISN, joining the ISNd branch and innervates muscles VO4-6. However, this neuron was not identified by Landgraf et al. (1997). Found (and survives) in labial, but not maxillary or mandibular segments (Rickert et al., 2018 - FBrf0238045).
Links to External Ontologies
VFB:FBbt_00001586
Annotations
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Data ClassFieldDirect annotations
Alleles (FBal)PHENOTYPE_MANIFEST_IN
Insertions (FBti)EXPRESSION_STAGE_TISSUE_POSITION
Constructs (FBtp)PHENOTYPE_MANIFEST_IN
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Relevant FlyBase reports
 Alleles Genes Insertions Constructs
 embryonic GW neuron (all annotations which use CV term, excluding "NOT" statements)
     embryonic GW neuron | ectopic
      --       --
     embryonic GW neuron | embryonic stage
      --       --       --
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embryo
 |__developing embryonic structure_______________
developing material anatomical entity            |
 |__developing embryonic structure_______________|
presumptive embryonic/larval system              |
 |__presumptive embryonic/larval nervous system__|
ectodermal derivative                            |
 |__NB7-3 lineage neuron_________________________|
primary neuron                                   |
 |__Notch ON hemilineage primary neuron__________|
 |__NB7-3 lineage neuron_________________________|
 |__immature primary neuron______________________|
Notch ON hemilineage neuron                      |
 |__Notch ON hemilineage primary neuron__________|
immature neuron                                  |
 |__immature primary neuron______________________|
CNS neuron                                       |
 |__NB7-3 lineage neuron_________________________|
                                                 embryonic GW neuron  18 rec.
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Is a developing embryonic structure
Notch ON hemilineage primary neuron
NB7-3 lineage neuron
immature primary neuron
Develops from ganglion mother cell GMC7-3a
Part of presumptive embryonic/larval nervous system
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VFB:FBbt_00001586