FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term neuroblast NB5-2 ID (Ontology) FBbt:00001376 (Fly Anatomy)
Definition Neuroblast that delaminates at stage 1 in the medial column (Hartenstein and Campos-Ortega, 1984). It generates a single motorneuron innervating muscle 12 via the SNb and a large number of interneurons, which constitute most of the posterior commissure (Schmid et al., 1999). In the embryo, one of these cells can be found in each hemisegment from S2-A8 (Birkholz et al., 2013; Urbach et al., 2016). In the larva, it resumes proliferation in at least S3-A7 (Lacin and Truman, 2016). The neurons that develop from this neuroblast after larval hatching form postembryonic lineage 6 (Lacin and Truman, 2016).[ FlyBase:FBrf0055900 FlyBase:FBrf0073294 FlyBase:FBrf0076117 FlyBase:FBrf0084809 FlyBase:FBrf0112030 FlyBase:FBrf0180161 FlyBase:FBrf0221210 FlyBase:FBrf0228122 FlyBase:FBrf0231327 FlyBase:FBrf0232096 ]
Also Known As"lineage 6 neuroblast" ; "lineage NB5-2 neuroblast" ; "NB 6" (for all, see Synonyms field below)
CommentThis is equivalent to the 'ventromedial neuroblast' of Truman and Bate (1988) - FBrf0047815, due to existence in A2-7 and its relatively medial location (Lacin and Truman, 2016). Lacin and Truman (2016) do not show data for neuromeres anterior to S3 (labial) or posterior to A7.
Links to External Ontologies
VFB:FBbt_00001376
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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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 Alleles Genes Insertions Constructs
 neuroblast NB5-2 (all annotations which use CV term, excluding "NOT" statements)
     neuroblast NB5-2 | germline clone
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central nervous system
 |__segmentally-repeated neuroblast__
neuroblast                           |
 |__stage 1 neuroblast_______________|
 |__segmentally-repeated neuroblast__|
ectodermal derivative                |
 |__segmentally-repeated neuroblast__|
                                     neuroblast NB5-2  32 rec.
                                      |__abdominal neuroblast NB5-2 4 rec.
                                      |   |__abdominal 1 neuroblast NB5-2
                                      |   |__abdominal 2 neuroblast NB5-2 1 rec.
                                      |   |__abdominal 3 neuroblast NB5-2 1 rec.
                                      |   |__abdominal 4 neuroblast NB5-2 1 rec.
                                      |   |__abdominal 5 neuroblast NB5-2 1 rec.
                                      |   |__abdominal 6 neuroblast NB5-2 1 rec.
                                      |   |__abdominal 7 neuroblast NB5-2 1 rec.
                                      |__labial neuroblast NB5-2
                                      |__maxillary neuroblast NB5-2
                                      |__thoracic neuroblast NB5-2
                                          |__mesothoracic neuroblast NB5-2
                                          |__metathoracic neuroblast NB5-2
                                          |__prothoracic neuroblast NB5-2
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Is a stage 1 neuroblast
segmentally-repeated neuroblast
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VFB:FBbt_00001376