FB2026_03 , released September 17, 2026
FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term egg operculum ID (Ontology) FBbt:00000045 (Fly Anatomy)
Definition Specialization of the chorion in the dorsal/anterior of the eggshell. Hatching occurs by splitting of the eggshell around the edge of the operculum, opening a hatch through which the larva can crawl.
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Direct annotations: records annotated with this exact term (child terms are NOT included)
Data ClassFieldDirect annotations
Alleles (FBal)PHENOTYPE_MANIFEST_IN
Insertions (FBti)EXPRESSION_STAGE_TISSUE_POSITION
Insertions (FBti)PHENOTYPE_MANIFEST_IN
Constructs (FBtp)PHENOTYPE_MANIFEST_IN
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Relevant FlyBase reports
 Alleles Images Insertions Constructs
 egg operculum (all annotations which use CV term, excluding "NOT" statements)
     egg operculum | ectopic
      --       --
     egg operculum | germline clone
      --
      --
     egg operculum | heat sensitive
      --       --       --
     egg operculum | maternal effect
      --
      --
     egg operculum | maternal effect | somatic clone
      --
     egg operculum | somatic clone
      --
      --
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chorion_________________________
acellular anatomical structure__|
                                chorionic specialization
                                 |__egg operculum  105 rec.
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Is a chorionic specialization
Develops from centripetal follicle cell
Part of
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