Class [Mammalia] Linnaeus, 1758 - mammals Order Rodentia Bowdich, 1821 - rodents Family Echimyidae Gray, 1825 - spiny rats Genus Clyomys Thomas, 1916 1 Clyomys bishopi Ávila-Pires & Wutke, 1981 2 Clyomys laticeps (Thomas, 1909)