FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term pars intercerebralis primordium ID (Ontology) FBbt:00005511 (Fly Anatomy)
Definition Primordium of the late embryonic pars intercerebralis. At stage 12, the primordium of each hemisphere forms a narrow cluster of approximately 40-50 cells, in the antero-medial procephalon, behind the furrow that separates the procephalon from the clypeolabrum. The primordium then invaginates from the procephalic ectoderm between stages 11 to 13. During stages 13 to 14, the invagination pinches off the surface ectoderm and forms small vesicles in between the outer epithelium and the brain surface.[ FlyBase:FBrf0193772 ]
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Data Class Field Records
Alleles (FBal)  PHENOTYPE_MANIFEST_IN       3
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION       1
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 Alleles Genes Insertions
 pars intercerebralis primordium (all annotations which use CV term, excluding "NOT" statements)       3     38      1
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developing material anatomical entity
 |__developing embryonic structure__
 |__primordium______________________|
ectodermal derivative               |
 |__anterior ectoderm derivative____|
                                    pars intercerebralis primordium  42 rec.
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Is a developing embryonic structure
primordium
anterior ectoderm derivative
Part of central brain primordium
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