Tylomys Peters 1866

Tylomys Peters 1866, Monatsb. K. Preuss. Akad. Wiss. Berlin, 1866: 404.

Type Species: Hesperomys nudicaudus Peters 1866

Species and subspecies: 7 species:

Species Tylomys bullaris Merriam 1901

Species Tylomys fulviventer Anthony 1916

Species Tylomys mirae Thomas 1899

Species Tylomys nudicaudus Peters 1866

Species Tylomys panamensis Gray 1873

Species Tylomys tumbalensis Merriam 1901

Species Tylomys watsoni Thomas 1899

Discussion: Tylomyini. Closely related to Ototylomys (see previous account). Phylogenetic evaluations of cytochrome b sequences arrange Tylomys either as sister-group to Sigmodontinae (D’Elía et al., 2003) or as a member of a polytomy that includes Arvicolinae-Neotominae-Sigmodontinae (D’Elía et al., in press). Nominal species listed follow Hall (1981:626), who remarked that "Study … may show that some of the species are only subspecies." Such taxonomic study is overdue.