Class Mammalia Linnaeus, 1758 - mammals Order Rodentia Bowdich, 1821 - rodents Suborder Hystricognathi Tullberg, 1899 see Infraorder Hystricognathi Tullberg, 1899 Family Ctenomyidae Lesson, 1842 - tuco-tucos 1 Genus Ctenomys Blainville, 1826 - tuco-tucos