stage 2 neuroblast neuroblast NB6-2 neuroblast g fly_anatomy.ontology NB 19 lineage 19 neuroblast lineage NB6-2 neuroblast neuroblast NB6-2 VFB:FBbt_00001391 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). FBbt:00001391 neuroblast 19 Lacin and Truman (2016) do not show data for neuromeres anterior to S3 (labial). segmentally-repeated neuroblast