FB2026_03 , released September 17, 2026

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 ]

Comment

Links to External Ontologies

Annotations

Records annotated with this term OR any of its CHILD TERMS

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Direct annotations: records annotated with this exact term (child terms are NOT included)

Data Class	Field	Direct annotations
Alleles (FBal)	PHENOTYPE_MANIFEST_IN
Insertions (FBti)	EXPRESSION_STAGE_TISSUE_POSITION

Full annotation statements including this term (annotations to child terms are NOT included), and relevant FlyBase records

Full annotation statements	Relevant FlyBase reports
Full annotation statements	Alleles	Genes	Insertions
pars intercerebralis primordium (all annotations which use CV term, excluding "NOT" statements)

Spanning Tree (Parents/Children)

embryo
 |__developing embryonic structure_____
developing embryonic structure         |
 |__central brain primordium___________|
extended germ band embryo              |
 |__central brain primordium___________|
dorsal closure embryo                  |
 |__central brain primordium___________|
primordium                             |
 |__central brain primordium___________|
developing material anatomical entity  |
 |__developing embryonic structure_____|
 |__primordium_________________________|
ectodermal derivative                  |
 |__anterior ectoderm derivative_______|
anterior ectoderm derivative           |
 |__central brain primordium___________|
                                       pars intercerebralis primordium  42 rec.

Spanning Tree View Settings
Parents/Children View Depth	Show hierarchy levels: for parents, for children
Relationships
Is a	developing embryonic structure primordium anterior ectoderm derivative
Part of	central brain primordium
Synonyms & Secondary IDs
Synonyms

Secondary IDs

External Crossreferences & Linkouts