Order Testudines Wagler, 1830 - turtles Suborder Cryptodira Cope, 1868 Superfamily Testudinoidea Batsch, 1788 Family Testudinidae Batsch, 1788 - tortoises Genus Chelonoidis Fitzinger, 1835 Chelonoidis nigra species complex - Galapagos giant tortoises see Chelonoidis niger species complex Chelonoidis chathamensis (Van Denburgh, 1907) - San Cristobal giant tortoise