obsolete thoracic neuroblast d 2009-06-24T07:24:30Z true fly_anatomy.ontology FBbt:00007343 Obsoleted in favor of having one term per neuroblast at all stages; it is unclear which neuroblasts this refers to in current terminology. A neuroblast that is part of one of the three bilateral pairs of deep (rather than superficial) neuroblasts, located rostral to the single medial neuroblast in each larval thoracic segment.