Mesostigmata (Monogynaspida)—Key feature pages

Coxa IV Setation

The coxae of the legs of most Mesostigmata bear 2 setae, except coxae IV, which typically have only a single seta. Rarely, the second seta on coxae IV is present, and even more rarely (Laelapidae, Myrmozercon), coxal hypertrichy may be present.