FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term katepisternal bristle ID (Ontology) FBbt:00004321 (Fly Anatomy)
Definition Bristle of the mesothoracic episternum or katepisternum. On the dorsal aspect there are 5 to 8 bristles, with 1 to 3 of them being very large (Bb-). In the ventral aspect there is an isolated bristle (I) and in the anterior region there are 2 to 4 yellow bristles (YB).[ FlyBase:FBrf0007734 FlyBase:FBrf0219028 ]
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VFB:FBbt_00004321
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Alleles (FBal)PHENOTYPE_MANIFEST_IN
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 katepisternal bristle (all annotations which use CV term, excluding "NOT" statements)
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adult mesothoracic sensillum
 |__mesothoracic bristle__
sclerite                  |
 |__katepisternum_________|
mesothoracic episternum   |
 |__katepisternum_________|
chaeta                    |
 |__mesothoracic bristle__|
                          katepisternal bristle  2 rec.
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Is a mesothoracic bristle
Develops from presumptive mesothoracic structures from mesothoracic leg disc
Part of katepisternum
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https://www.ento.csiro.au/biology/drosophila/melanogaster.html?katepisternal%20setae%20
https://www.ento.csiro.au/biology/drosophila/melanogaster.html?katepisternal%20setulae
VFB:FBbt_00004321