FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term ptilinum ID (Ontology) FBbt:00004483 (Fly Anatomy)
Definition Membranous sac that is part of the front of the head capsule. It is everted at eclosion and serves to break open the operculum at the end of the puparium. Following eclosion, it is withdrawn into the head where it collapses and becomes sclerotized, externally leaving the ptilinal suture.[ FlyBase:FBrf0007310 FlyBase:FBrf0007734 FlyBase:FBrf0031004 ]
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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      12
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION       1
Constructs (FBtp)  PHENOTYPE_MANIFEST_IN       9
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Relevant FlyBase reports
 Alleles Genes Images Insertions Constructs
 ptilinum (all annotations which use CV term, excluding "NOT" statements)      12      1      7      1      9
     ptilinum | clone of cells       1       --       --       --       --
Spanning Tree (Parents/Children)
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  organ system subdivision
   |__region of integument
       |__ptilinum  32 rec.
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Is a region of integument
Develops from presumptive ptilinum
Part of adult head capsule
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