FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term epandrium ID (Ontology) FBbt:00004839 (Fly Anatomy)
Definition Horseshoe-shaped tergite which, dorsally, surrounds the male cerci. It contains about 30 epandrial bristles on each side. The left and right sides of the epandrium are connected by the subepandrial sclerite. The ventral part of each side of the epandrium is divided into an epandrial ventral lobe and an epandrial posterior lobe.[ FlyBase:FBrf0029539 FlyBase:FBrf0244105 ]
Also Known As"abdominal tergite 9" ; "genital arch"
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Data ClassFieldDirect annotations
Alleles (FBal)PHENOTYPE_MANIFEST_IN
Insertions (FBti)PHENOTYPE_MANIFEST_IN
Constructs (FBtp)PHENOTYPE_MANIFEST_IN
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Relevant FlyBase reports
 Alleles Images Insertions Constructs
 epandrium (all annotations which use CV term, excluding "NOT" statements)
     epandrium | ectopic
      --       --       --
     epandrium | heat sensitive
      --       --       --
     epandrium | male | somatic clone
      --
      --
     epandrium | somatic clone
      --       --
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Vocabulary search 
abdominal segment 9
 |__adult abdominal segment 9____
adult abdominal segment          |
 |__abdominal tergite____________|
adult telson                     |
 |__adult abdominal segment 9____|
sclerite                         |
 |__abdominal tergite____________|
adult external abdomen           |
 |__abdominal tergite____________|
genitalia                        |
 |__male genitalia_______________|
male terminalia                  |
 |__male genitalia_______________|
 |__periphallic sclerite_________|
dorsal ectoderm derivative       |
 |__abdominal tergite____________|
region of integument             |
 |__periphallic sclerite_________|
male-specific anatomical entity  |
 |__male genitalia_______________|
 |__periphallic sclerite_________|
adult terminal segment           |
 |__adult abdominal segment 9____|
                                 epandrium  64 rec.
                                  |__epandrial anterodorsal phragma
                                  |__epandrial bristle
                                  |   |__epandrial dorsal lobe bristle
                                  |   |__epandrial ventral lobe bristle
                                  |__epandrial dorsal lobe
                                  |   |__epandrial dorsal lobe bristle
                                  |__epandrial posterior lobe 9 rec.
                                  |__epandrial ventral lobe 31 rec.
                                      |__epandrial ventral lobe bristle
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Is a abdominal tergite
periphallic sclerite
Develops from presumptive epandrium
Part of adult abdominal segment 9
male genitalia
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https://www.ento.csiro.au/biology/drosophila/melanogaster.html?epandrium