FB2026_03 , released September 17, 2026
CV Term Report
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Term stage 1 neuroblast ID (Ontology) FBbt:00001370 (Fly Anatomy)
Definition The first neuroblast subpopulation delaminating from the ventral neurectoderm towards the end of the second mesodermal cell division, shortly after gastrulation (Hartenstein and Campos-Ortega, 1984). These neuroblasts are generally arranged in two fairly regular longitudinal rows (the medial and lateral longitudinal rows), with a few cells scattered in an intermediate row. Doe (1992) defines the end of S1 as being early embryonic stage 9 following the development of NB3-2.[ FlyBase:FBrf0055900 FlyBase:FBrf0073294 FlyBase:FBrf0076117 FlyBase:FBrf0112030 ]
CommentFigure 7 of Hartenstein and Campos-Ortega, (1984), graphically depicts the pattern formed by the population of neuroblasts for the left half of the germ band.
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VFB:FBbt_00001370
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 stage 1 neuroblast (all annotations which use CV term, excluding "NOT" statements)
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  somatic stem cell
   |__neuroblast
       |__stage 1 neuroblast  186 rec.
           |__neuroblast MP2 36 rec.
           |   |__mandibular neuroblast MP2
           |__neuroblast NB1-1 35 rec.
           |   |__abdominal neuroblast NB1-1 2 rec.
           |   |__labial neuroblast NB1-1
           |   |__maxillary neuroblast NB1-1
           |   |__thoracic neuroblast NB1-1
           |__neuroblast NB2-5 19 rec.
           |   |__abdominal neuroblast NB2-5(+)
           |   |__labial neuroblast NB2-5
           |   |__mandibular neuroblast NB2-5
           |   |__maxillary neuroblast NB2-5
           |   |__thoracic neuroblast NB2-5
           |__neuroblast NB3-2 26 rec.
           |   |__abdominal neuroblast NB3-2(+)
           |   |__labial neuroblast NB3-2
           |   |__maxillary neuroblast NB3-2
           |   |__thoracic neuroblast NB3-2
           |__neuroblast NB3-5 22 rec.
           |   |__abdominal neuroblast NB3-5(+) 6 rec.
           |   |__labial neuroblast NB3-5
           |   |__mandibular neuroblast NB3-5
           |   |__maxillary neuroblast NB3-5
           |   |__thoracic neuroblast NB3-5(+) 1 rec.
           |__neuroblast NB5-2 32 rec.
           |   |__abdominal neuroblast NB5-2(+) 4 rec.
           |   |__labial neuroblast NB5-2
           |   |__maxillary neuroblast NB5-2
           |   |__thoracic neuroblast NB5-2(+)
           |__neuroblast NB5-3 35 rec.
           |   |__abdominal neuroblast NB5-3(+) 4 rec.
           |   |__labial neuroblast NB5-3
           |   |__mandibular neuroblast NB5-3
           |   |__maxillary neuroblast NB5-3
           |   |__thoracic neuroblast NB5-3(+)
           |__neuroblast NB5-6 59 rec.
           |   |__abdominal neuroblast NB5-6 15 rec.
           |   |__labial neuroblast NB5-6
           |   |__mandibular neuroblast NB5-6
           |   |__maxillary neuroblast NB5-6
           |   |__thoracic neuroblast NB5-6 33 rec.
           |__neuroblast NB7-1 45 rec.
           |   |__abdominal neuroblast NB7-1(+)
           |   |__labial neuroblast NB7-1
           |   |__mandibular neuroblast NB7-1
           |   |__maxillary neuroblast NB7-1
           |   |__thoracic neuroblast NB7-1
           |__neuroblast NB7-4 31 rec.
               |__abdominal neuroblast NB7-4(+)
               |__labial neuroblast NB7-4
               |__mandibular neuroblast NB7-4
               |__maxillary neuroblast NB7-4
               |__thoracic neuroblast NB7-4
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Synonyms
  • "S1 neuroblast" RELATED
    "SI neuroblast" RELATED
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VFB:FBbt_00001370