FB2026_03 , released September 17, 2026
FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term embryonic proventriculus ID (Ontology) FBbt:00005607 (Fly Anatomy)
Definition Proventriculus of the embryo. It contains three distinct cell layers: inner, intermediate and outer. At the anterior end, corresponding to the most anterior region of the midgut, imaginal cells are found at the level of the intermediate layer.[ FlyBase:FBrf0064792 ]
Comment This structure is more correctly referred to as the 'cardia'. Strictly, proventriculus refers to a modification of the foregut, just anterior to the stomodeal valve, found in many insects. Drosophila has no such foregut modification (Miller, 1950). However, the term 'proventriculus' is the one most commonly used for this structure.
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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 Genes Images Insertions Constructs
 embryonic proventriculus (all annotations which use CV term, excluding "NOT" statements)
     embryonic proventriculus | embryonic stage 15
      --       --       --
     embryonic proventriculus | embryonic stage 15 | male limited
      --       --       --       --
     embryonic proventriculus | embryonic stage 16
      --       --       --
     embryonic proventriculus | embryonic stage 16 | male limited
      --       --       --       --
     embryonic proventriculus | embryonic stage 17
      --       --       --
     embryonic proventriculus | embryonic stage 17 | male limited
      --       --       --       --
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multi-tissue structure
 |__proventriculus_________________________________
presumptive embryonic/larval system                |
 |__presumptive embryonic/larval digestive system__|
gut section                                        |
 |__proventriculus_________________________________|
                                                   embryonic proventriculus  448 rec.
                                                    |__embryonic proventriculus inner layer 61 rec.
                                                    |__embryonic proventriculus intermediate layer 27 rec.
                                                    |__embryonic proventriculus outer layer 1 rec.
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Is a proventriculus
Develops from proventriculus primordium
Part of presumptive embryonic/larval digestive system
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