FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term mushroom body ID (Ontology) FBbt:00005801 (Fly Anatomy)
Definition Bilaterally paired neuropil structure situated postero-dorsally in the protocerebrum that functions in olfactory associative learning and memory. The mushroom body is divided into: the calyx, which is closest to the cortex and receives sensory interneuron afferents; the pedunculus, which is a thick axon bundle extending from the calyx to the base of the lobes; and the mushroom body lobe system, which consists of a vertical branch and a medial branch, which have different structures at different life stages (Lee et al., 1999; Ito et al., 2014).[ FlyBase:FBrf0111409 FlyBase:FBrf0224194 FlyBase:FBrf0248215 ]
Also Known As "corpora pedunculata" ; "MB"
Comment This term as defined in Ito et al. (2014) corresponds to both the mushroom body (MB) and calyx (Cal) of Chiang et al. (2011).
Links to External Ontologies
VFB:FBbt_00005801
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      65
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION      26
Insertions (FBti)  PHENOTYPE_MANIFEST_IN       9
Constructs (FBtp)  PHENOTYPE_MANIFEST_IN      36
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
 mushroom body (all annotations which use CV term, excluding "NOT" statements)      87     17     35     59
     mushroom body | adult stage      14       --       1      9
     mushroom body | adult stage | heat sensitive       3       --       --       2
     mushroom body | adult stage | somatic clone       1       --       --       --
     mushroom body | P-stage       5       --       --       3
     mushroom body | P-stage | heat sensitive       2       --       --       1
     mushroom body | P-stage | somatic clone       1       --       --       --
     mushroom body | progressive       4       --       --       3
     mushroom body | pupal stage       2       --       --       1
     mushroom body | somatic clone       9       --       1      1
     mushroom body | third instar larval stage       2       --       --       2
Spanning Tree (Parents/Children)
Only view relationship:
disconnected anatomical group
 |__synaptic neuropil block_______
ectodermal derivative             |
 |__anterior ectoderm derivative__|
synaptic neuropil                 |
 |__synaptic neuropil block_______|
                                  mushroom body  6112 rec.
                                   |__adult mushroom body 5808 rec.
                                   |__embryonic/larval mushroom body 285 rec.
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Is a anterior ectoderm derivative
synaptic neuropil block
Develops from mushroom body primordium
Part of protocerebrum
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Synonyms
Secondary IDs
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UBERON:0001058
VFB:FBbt_00005801