FB2026_02 , released June 18, 2026
FB2026_02 , released June 18, 2026
CV Term Report
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General Information
Term FBbt:00000046 ID (Ontology) FBbt:00000046 (Fly Anatomy)
Definition Paired appendage of the eggshell, located on the anterior-dorsal side of the egg, just posterior to the operculum. Functions as a respiratory structure. The dorsal appendages are formed during the final stages of oogenesis, when dorsal appendage forming follicle cells form paired tubular structures and secrete chorion proteins into the tube lumens to create the dorsal appendages. During eggshell maturation the dorsal appendage forming cells slough off, revealing the chorionic dorsal appendages inside.[ FlyBase:FBrf0064777 FlyBase:FBrf0174518 ]
Also Known As "chorionic appendage"
Comment Note that dorsal appendage structure varies considerably between Drosophilid species.
Links to External Ontologies
Annotations
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     770
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION       5
Insertions (FBti)  PHENOTYPE_MANIFEST_IN     119
Constructs (FBtp)  PHENOTYPE_MANIFEST_IN     178
show Full annotation statements including this term (annotations to child terms are NOT included), and relevant FlyBase records
 Full annotation statements 
Relevant FlyBase reports
 Alleles Genes Images Insertions Constructs
 FBbt:00000046 (all annotations which use CV term, excluding "NOT" statements)     770      4      3    124    178
     FBbt:00000046 | FBcv:0000059 | FBcv:0000336       1       --       --       --       --
     FBbt:00000046 | FBcv:0000061      18       --       --       2      8
     FBbt:00000046 | FBcv:0000061 | FBcv:0000311       2       --       --       --       2
     FBbt:00000046 | FBcv:0000061 | FBcv:0000312       4       --       --       --       4
     FBbt:00000046 | FBcv:0000061 | FBcv:0000336       2       --       --       --       2
     FBbt:00000046 | FBcv:0000068       2       --       --       --       1
     FBbt:00000046 | FBcv:0000154 | FBcv:0000061 | FBcv:0000336       2       --       --       --       2
     FBbt:00000046 | FBcv:0000161     106       --       --      24     17
     FBbt:00000046 | FBcv:0000161 | FBcv:0000311       2       --       --       --       2
     FBbt:00000046 | FBcv:0000161 | FBcv:0000336      24       --       --       8       --
     FBbt:00000046 | FBcv:0000162       2       --       --       --       1
     FBbt:00000046 | FBcv:0000311      10       --       --       --       5
     FBbt:00000046 | FBcv:0000312       3       --       --       --       --
     FBbt:00000046 | FBcv:0000313       5       --       --       4      1
     FBbt:00000046 | FBcv:0000335      67       --       --      12      1
     FBbt:00000046 | FBcv:0000335 | FBcv:0000068       3       --       --       --       --
     FBbt:00000046 | FBcv:0000335 | FBcv:0000161      27       --       --       3       --
     FBbt:00000046 | FBcv:0000335 | FBcv:0000162       4       --       --       --       --
     FBbt:00000046 | FBcv:0000336      29       --       --       6      7
     FBbt:00000046 | FBcv:0000336 | FBcv:0000070       1       --       --       --       --
     FBbt:00000046 | FBcv:0007048 | FBcv:0000335       1       --       --       --       --
     FBbt:00000046 | FBcv:0007049       1       --       --       --       --
     FBbt:00000046 | FBdv:00004886       2       --       --       --       --
     FBbt:00000046 | FBdv:00005283       4       --       --       --       3
     FBbt:00000046 | FBdv:00005286       2       --       --       --       --
     FBbt:00000046 | FBdv:00005289 | FBcv:0000161       2       --       --       --       --
     FBbt:00000046 | FBdv:00005327       2       --       --       1       --
Spanning Tree (Parents/Children)
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FBbt:00000038
 |__FBbt:00007248__
FBbt:00007013      |
 |__FBbt:00007248__|
                   FBbt:00000046  1079 rec.
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Is a chorionic specialization
Develops from dorsal appendage forming follicle cell
Part of
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Synonyms
Secondary IDs
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UBERON:6000046