Order Testudines Wagler, 1830 - turtles Suborder Pleurodira Cope, 1864 Family Chelidae Gray, 1825 Subfamily Chelinae Gray, 1825 Genus Acanthochelys Gray, 1873 Acanthochelys pallidipectoris (Freiberg, 1945) Iverson, 1986 - Chaco side-necked turtle