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 Scolomys Anthony, 1924 - spiny mouse
1 Scolomys melanops Anthony, 1924 - Ecuador spiny mouse
2 Scolomys ucayalensis Pacheco, 1991