Class Mammalia Linnaeus, 1758 - mammals Order Rodentia Bowdich, 1821 - rodents Suborder Hystricognathi Tullberg, 1899 see Infraorder Hystricognathi Tullberg, 1899 Family ‡Heptaxodontidae Anthony, 1917 Subfamily ‡Heptaxodontinae Anthony, 1917 see Family Heptaxodontidae Anthony, 1917 Genus ‡Elasmodontomys Anthony, 1916 1 ‡Elasmodontomys obliquus Anthony, 1916