FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term embryonic/larval mushroom body ID (Ontology) FBbt:00011929 (Fly Anatomy)
Definition Mushroom body (MB) of the larva. It only has two lobes, medial and vertical, in contrast to the adult MB, which has five lobes (Lee et al., 1999). Both lobes are composed of gamma neurons, which are the only Kenyon cells (KCs) present in the newly hatched first instar (Kunz et al., 2012). MB neuroblasts continue to produce new KCs throughout the larval stages (Lee et al., 1999). These new KCs form layers in the larval MB peduncle and lobes, with four distinguishable layers present in the third instar (Kurusu et al., 2002). Three types of KCs can be identified in these layers: embryonic-born gamma type (surface layer), larval-born gamma type (outer and inner layers) and larval-born alpha'/beta' type (core layer) neurons (Kurusu et al., 2002). During the pupal stage, alpha/beta KCs are produced and the larval MB is remodeled into the adult MB (Lee et al., 1999).[ FlyBase:FBrf0111409 FlyBase:FBrf0144836 FlyBase:FBrf0218649 ]
Also Known As "larval mushroom body"
Comment The four layers in the pedunculus and lobes were identified by staining with a FasII antibody. The surface layer is partially FasII-negative, the outer and inner layers are FasII-positive and the core is FasII-negative (Selcho et al., 2009; Kurusu et al., 2002).
Links to External Ontologies
VFB:FBbt_00011929
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      47
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION     114
Insertions (FBti)  PHENOTYPE_MANIFEST_IN       1
Constructs (FBtp)  PHENOTYPE_MANIFEST_IN      10
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
 embryonic/larval mushroom body (all annotations which use CV term, excluding "NOT" statements)      47     12    115     48
     embryonic/larval mushroom body | absent | embryonic stage       1       --       --       --
     embryonic/larval mushroom body | embryonic stage       1       --       --       --
     embryonic/larval mushroom body | female       1       --       --       --
     embryonic/larval mushroom body | larval stage       6       --       --       3
     embryonic/larval mushroom body | P-stage | somatic clone       1       --       --       --
     embryonic/larval mushroom body | somatic clone      18       --       --       --
     embryonic/larval mushroom body | somatic clone | third instar larval stage       1       --       --       --
     embryonic/larval mushroom body | third instar larval stage      14       --       1      2
Spanning Tree (Parents/Children)
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anterior ectoderm derivative__
synaptic neuropil block_______|
                              mushroom body
                               |__embryonic/larval mushroom body  285 rec.
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Is a mushroom body
Part of larval protocerebrum
larval central brain
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Synonyms
  • "larval mushroom body" EXACT
Secondary IDs
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larvalbrain_neuropil:385
larvalbrain_neuropil:563
VFB:FBbt_00011929