Order Testudines Wagler, 1830 - turtles Suborder Cryptodira Cope, 1868 Superfamily Testudinoidea Batsch, 1788 Family Testudinidae Batsch, 1788 - tortoises Genus Pyxis Bell, 1827 Pyxis arachnoides Bell, 1827 - spider tortoise 1 Pyxis arachnoides arachnoides Bell, 1827 - spider tortoise 2 Pyxis arachnoides brygooi (Vuillemin & Domergue, 1972) - northern spider tortoise 3 Pyxis arachnoides oblonga Gray, 1869 - southern spider tortoise