The Neotropical genus Orosarcophaga Townsend: illustrated key and redecription of Orosarcophaga grisea Lopes (Diptera: Sarcophagidae)

Orosarcophaga Townsend, 1927 is a genus of flesh flies with 11 recognized species, for which knowledge of biology and distribution remains poorly known. The lack of a key to the identification of its species hinders their recognition and further taxonomic studies. Moreover, the holotypes of three species were lost in the Museu Nacional (Universidade Federal do Rio de Janeiro) fire in 2018, and comparisons with this material became impossible.

In this context, a key to the 11 known species is presented, with new illustrations of structures of the male terminalia used to diagnose species. Also, recently surveyed specimens from Brazil were identified as Orosarcophaga grisea (Lopes, 1982), a species previously known only from Peru. Together with the redescription of the male terminalia of O. grisea, the geographical range of this species has been expanded.

A distribution map is presented for all species.