FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term neuroblast NB3-2 ID (Ontology) FBbt:00001388 (Fly Anatomy)
Definition Neuroblast that delaminates at S1 and generates around 6 motorneurons and a cluster of local interneurons (Schmid et al., 1999). In the embryo, one of these cells can be found in each hemisegment from S2-A9 (Birkholz et al., 2013; Urbach et al., 2016). In the larva, it resumes proliferation in T1 to A1 segments (Lacin and Truman, 2016). The neurons that develop from this neuroblast after larval hatching form postembryonic lineage 7 (Lacin and Truman, 2016).[ FlyBase:FBrf0112030 FlyBase:FBrf0221210 FlyBase:FBrf0231327 FlyBase:FBrf0232096 ]
Also Known As"lineage 7 neuroblast" ; "lineage NB3-2 neuroblast" ; "NB 7" (for all, see Synonyms field below)
CommentBirkholz et al. (2015) suggest that NB3-2 generates postembryonic lineage 15 and NB4-2 generates postembryonic lineage 7, but Lacin and Truman (2016) provide lineage tracing and marker data showing that NB3-2 generates lineage 7. Lacin and Truman (2016) do not show data for neuromeres anterior to S3 (labial).
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VFB:FBbt_00001388
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Data ClassFieldDirect annotations
Alleles (FBal)PHENOTYPE_MANIFEST_IN
Insertions (FBti)EXPRESSION_STAGE_TISSUE_POSITION
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 neuroblast NB3-2 (all annotations which use CV term, excluding "NOT" statements)
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central nervous system
 |__segmentally-repeated neuroblast__
neuroblast                           |
 |__stage 1 neuroblast_______________|
 |__segmentally-repeated neuroblast__|
ectodermal derivative                |
 |__segmentally-repeated neuroblast__|
                                     neuroblast NB3-2  26 rec.
                                      |__abdominal neuroblast NB3-2
                                      |   |__abdominal 1 neuroblast NB3-2
                                      |__labial neuroblast NB3-2
                                      |__maxillary neuroblast NB3-2
                                      |__thoracic neuroblast NB3-2
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VFB:FBbt_00001388