FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term neuroblast NB6-2 ID (Ontology) FBbt:00001391 (Fly Anatomy)
Definition Neuroblast that delaminates in S2 in the intermediate column and, in thoracic and abdominal hemisegments, generates 8-16 primary interneurons that project in two bundles across the posterior commissure (Schmid et al., 1999). In the embryo, one of these cells can be found in each hemisegment from S1-A8 (Birkholz et al., 2013; Urbach et al., 2016), and it migrates dorsally during embryonic development (Lacin and Truman, 2016). In the larva, it resumes proliferation in segments S3 to A2 (Lacin and Truman, 2016). The neurons that develop from this neuroblast after larval hatching form postembryonic lineage 19 (Lacin and Truman, 2016).[ FlyBase:FBrf0112030 FlyBase:FBrf0221210 FlyBase:FBrf0228122 FlyBase:FBrf0231327 FlyBase:FBrf0232096 ]
Also Known As"lineage 19 neuroblast" ; "lineage NB6-2 neuroblast" ; "NB 19" (for all, see Synonyms field below)
CommentLacin and Truman (2016) do not show data for neuromeres anterior to S3 (labial).
Links to External Ontologies
VFB:FBbt_00001391
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Data ClassFieldDirect annotations
Alleles (FBal)PHENOTYPE_MANIFEST_IN
Insertions (FBti)EXPRESSION_STAGE_TISSUE_POSITION
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 neuroblast NB6-2 (all annotations which use CV term, excluding "NOT" statements)
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central nervous system
 |__segmentally-repeated neuroblast__
neuroblast                           |
 |__stage 2 neuroblast_______________|
 |__segmentally-repeated neuroblast__|
ectodermal derivative                |
 |__segmentally-repeated neuroblast__|
                                     neuroblast NB6-2  20 rec.
                                      |__abdominal neuroblast NB6-2
                                      |   |__abdominal 1 neuroblast NB6-2
                                      |   |__abdominal 2 neuroblast NB6-2
                                      |__labial neuroblast NB6-2
                                      |__mandibular neuroblast NB6-2
                                      |__maxillary neuroblast NB6-2
                                      |__thoracic neuroblast NB6-2
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Is a stage 2 neuroblast
segmentally-repeated neuroblast
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VFB:FBbt_00001391