Order Testudines Wagler, 1830 - turtles Suborder Pleurodira Cope, 1864 Family Chelidae Gray, 1825 Subfamily Chelinae Gray, 1825 Genus Acanthochelys Gray, 1873 Acanthochelys macrocephala (Rhodin, Mittermeier & McMorris, 1984) - Pantanal swamp turtle