Class Mammalia Linnaeus, 1758 - mammals Order Rodentia Bowdich, 1821 - rodents Suborder Hystricognathi Tullberg, 1899 see Infraorder Hystricognathi Tullberg, 1899 Family Echimyidae Gray, 1825 - spiny rats Subfamily Dactylomyinae Tate, 1935 Genus Olallamys Emmons, 1988 1 Olallamys albicauda (Günther, 1879) 2 Olallamys edax (Thomas, 1916)