FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term tarsus ID (Ontology) FBbt:00051079 (Fly Anatomy)
Definition Fifth most proximal segment of the adult leg (Held et al., 1986; Schubiger et al., 2012). It can be subdivided into five smaller segments, connected by simple hinged joints (Held et al., 1986; Schubiger et al., 2012).[ FlyBase:FBrf0045354 FlyBase:FBrf0219028 ]
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Data ClassFieldDirect annotations
Alleles (FBal)PHENOTYPE_MANIFEST_IN
Constructs (FBtp)PHENOTYPE_MANIFEST_IN
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 Alleles Constructs
 tarsus (all annotations which use CV term, excluding "NOT" statements)
     tarsus | absent
     tarsus | adult stage
      --
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leg
 |__segment of leg_______________
appendage segment                |
 |__segment of leg_______________|
ectodermal derivative            |
 |__ventral ectoderm derivative__|
                                 tarsus  1403 rec.
                                  |__mesothoracic tarsus 84 rec.
                                  |   |__mesothoracic tarsal segment(+) 84 rec.
                                  |__metathoracic tarsus 81 rec.
                                  |   |__metathoracic tarsal segment(+) 81 rec.
                                  |__prothoracic tarsus 594 rec.
                                  |   |__prothoracic tarsal segment(+) 594 rec.
                                  |__tarsal segment 1399 rec.
                                      |__mesothoracic tarsal segment(+) 84 rec.
                                      |__metatarsus(+) 657 rec.
                                      |__metathoracic tarsal segment(+) 81 rec.
                                      |__prothoracic tarsal segment(+) 594 rec.
                                      |__tarsal segment 2(+) 111 rec.
                                      |__tarsal segment 3(+) 120 rec.
                                      |__tarsal segment 4(+) 159 rec.
                                      |__tarsal segment 5(+) 41 rec.
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Is a segment of leg
ventral ectoderm derivative
Develops from leg disc
Part of
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Synonyms
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https://www.ento.csiro.au/biology/drosophila/melanogaster.html?tarsi