FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term neuroblast MBp ID (Ontology) FBbt:00007113 (Fly Anatomy)
Definition Neuroblast that is the precursor to the Kenyon cells (Kunz et al., 2012). There are four of these per hemisphere and they each arise from a distinct neuroectodermal progenitor and produce morphologically distinct primary lineages (Kunz et al., 2012). They continue to divide from the embryonic to the late pupal stage (Lee et al., 1999; Kunz et al., 2012). All four produce largely identical lineages postembryonically (Ito et al., 2013; Yu et al., 2013), sequentially producing gamma, alpha'/beta' and alpha/beta Kenyon cells (Lee et al., 1999; Kunz et al., 2012). In the adult, each lineage remains distinct within the calyx and pedunculus, but the axons reorganize and intermingle within the lobes (Li et al., 2020).[ FlyBase:FBrf0092568 FlyBase:FBrf0111409 FlyBase:FBrf0218649 FlyBase:FBrf0221412 FlyBase:FBrf0221438 FlyBase:FBrf0248215 ]
Also Known As "MB-Nb" ; "MBNB" ; "MBp1-4" (for all, see Synonyms field below)
Comment See Ito et al. (2013) figure S1 for distinction between MBp1-4.
Links to External Ontologies
VFB:FBbt_00007113
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      24
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION       5
Insertions (FBti)  PHENOTYPE_MANIFEST_IN       5
Constructs (FBtp)  PHENOTYPE_MANIFEST_IN       9
show Full annotation statements including this term (annotations to child terms are NOT included), and relevant FlyBase records
 Full annotation statements 
Relevant FlyBase reports
 Alleles Genes Insertions Constructs
 neuroblast MBp (all annotations which use CV term, excluding "NOT" statements)      24     11     10      9
     neuroblast MBp | cell non-autonomous       2       --       --       1
     neuroblast MBp | decreased number | somatic clone       1       --       1       --
     neuroblast MBp | embryonic stage       1       --       --       --
     neuroblast MBp | embryonic stage 10       2       --       --       2
     neuroblast MBp | embryonic stage 11       2       --       --       2
     neuroblast MBp | embryonic stage 12       2       --       --       2
     neuroblast MBp | embryonic stage 9       2       --       --       2
     neuroblast MBp | larval stage       3       --       1       --
     neuroblast MBp | larval stage | increased number       1       --       --       --
     neuroblast MBp | P-stage       2       --       --       1
     neuroblast MBp | P-stage | somatic clone       1       --       --       --
     neuroblast MBp | somatic clone       4       --       1       --
     neuroblast MBp | somatic clone | third instar larval stage       1       --       --       --
     neuroblast MBp | third instar larval stage       4       --       --       2
Spanning Tree (Parents/Children)
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  procephalic neuroblast
   |__protocerebral neuroblast
       |__neuroblast MBp  61 rec.
           |__neuroblast MBp1
           |__neuroblast MBp2
           |__neuroblast MBp3
           |__neuroblast MBp4
           |__Pcd2 neuroblast 7 rec.
           |__Pcd4 neuroblast 6 rec.
           |__Pcd9 neuroblast 6 rec.
           |__Pcv9 neuroblast 7 rec.
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Is a protocerebral neuroblast
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Synonyms
Secondary IDs
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VFB:FBbt_00007113