Order Testudines Wagler, 1830 - turtles
   Suborder Pleurodira Cope, 1864
     Family Chelidae Gray, 1825
       Subfamily Chelinae Gray, 1825
         Genus Acanthochelys Gray, 1873
           1 Acanthochelys macrocephala (Rhodin, Mittermeier & McMorris, 1984) - Pantanal swamp turtle
           2 Acanthochelys pallidipectoris (Freiberg, 1945) Iverson, 1986 - Chaco side-necked turtle
           3 Acanthochelys radiolata (Mikan, 1820) Iverson, 1986 - Brazilian radiolated swamp turtle
           4 Acanthochelys spixii (Duméril & Bibron, 1835) Iverson, 1986 - black spiny-necked turtle