FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term clypeus ID (Ontology) FBbt:00004521 (Fly Anatomy)
Definition Large, conspicuous anterior sclerite of the medial rostrum (Ferris, 1950). It has the form of an inverted 'U' and is surrounded by a membranous field (Ferris, 1950).[ FlyBase:FBrf0166419 ]
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Data ClassFieldDirect annotations
Alleles (FBal)PHENOTYPE_MANIFEST_IN
Constructs (FBtp)PHENOTYPE_MANIFEST_IN
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 clypeus (all annotations which use CV term, excluding "NOT" statements)
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proboscis
 |__rostrum_______________________
region of integument              |
 |__sclerite______________________|
ectodermal derivative             |
 |__anterior ectoderm derivative__|
 |__ventral ectoderm derivative___|
multicellular structure           |
 |__rostrum_______________________|
                                  clypeus  13 rec.
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Is a sclerite
anterior ectoderm derivative
ventral ectoderm derivative
Develops from clypeo-labral disc
Part of rostrum
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https://www.ento.csiro.au/biology/drosophila/melanogaster.html?clypeus
UBERON:6004521