overlaps stage 4 neuroblast neuroblast MNB neuroblast 0 Lacin and Truman (2016) do not show data for segments anterior to S3. NB 0 fly_anatomy.ontology neuroblast m Unpaired neuroblast that forms from the mesectodermal cells of the ventral midline during the fourth wave of delamination (Schmid et al., 1999). During embryonic development, it gives rise to a cluster of around 8 cells with bilateral projections (Schmid et al., 1999). In the embryo, one of these cells can be found in each segment from S1-A10 (Birkholz et al., 2013; Urbach et al., 2016). In the larva, it resumes proliferation in segments S3 to A1 (Lacin and Truman, 2016). The neurons that develop from this neuroblast after larval hatching form postembryonic lineage 0 (Lacin and Truman, 2016). median neuroblast lineage 0 neuroblast medial neuroblast neuroblast MNB lineage MNB neuroblast FBbt:00001419 VFB:FBbt_00001419 segmentally-repeated neuroblast midline