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 Eumysopinae Rusconi, 1935 see Subfamily Heteropsomyinae Anthony, 1917 Genus Mesomys Wagner, 1845 Mesomys hispidus (Desmarest, 1817)