Class Mammalia Linnaeus, 1758 - mammals
Order Rodentia Bowdich, 1821 - rodents
Suborder Sciurognathi (Tullberg, 1899)
see Suborder Sciuromorpha Brandt, 1855
Family Muridae Batsch, 1788 - rats, mice, hamsters, voles, lemmings, and gerbils
Subfamily Sigmodontinae Wagner, 1843
Genus Holochilus Brandt, 1835 - web-footed rats
1 Holochilus brasiliensis Desmarest, 1819
2 Holochilus chacarius Thomas, 1906
3 Holochilus magnus Hershkovitz, 1955
4 Holochilus sciureus Wagner, 1842