FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term medulla forming neuroblast ID (Ontology) FBbt:00001938 (Fly Anatomy)
Definition A neuroblast that is the precursor of the medulla. The neuroblasts that give rise to the outer medulla neurons are located in the medial edge of the larval outer optic anlage, whereas the neuroblasts that give rise to the inner medulla neurons are located in the larval inner optic anlage.[ FlyBase:FBrf0193624 FlyBase:FBrf0214710 FlyBase:FBrf0253187 ]
Comment Can be distinguished from other optic lobe neuroblasts based on expression of dpn and ase (Konstantinides et al., 2022).
Links to External Ontologies
VFB:FBbt_00001938
Annotations
Records annotated with this term OR any of its CHILD TERMS
Records annotated with this exact term (annotations to child terms are NOT included)
Data Class Field Records
Alleles (FBal)  PHENOTYPE_MANIFEST_IN       7
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION       1
Insertions (FBti)  PHENOTYPE_MANIFEST_IN       2
Constructs (FBtp)  PHENOTYPE_MANIFEST_IN       5
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Relevant FlyBase reports
 Alleles Genes  Insertions Constructs
 medulla forming neuroblast (all annotations which use CV term, excluding "NOT" statements)       7     13      1      3      6
     medulla forming neuroblast | decreased number       2       --       --       --       2
     medulla forming neuroblast | larval stage | somatic clone       2       --       --       --       2
     medulla forming neuroblast | P-stage | decreased number | somatic clone       2       --       --       --       2
Spanning Tree (Parents/Children)
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protocerebral neuroblast__
larval neuroblast_________|
                          optic neuroblast
                           |__medulla forming neuroblast  30 rec.
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Is a optic neuroblast
Part of larval optic anlage
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VFB:FBbt_00001938