Phylum [Vertebrata] (Lamarck, 1801) Class Reptilia Linnaeus, 1758 - reptiles Subclass Testudinata Oppel, 1811 - testudinates Order Chelonia Brongniart, 1800 see Class Chelonia Brongniart, 1800 Suborder Cryptodira Cope, 1868 Family Trionychidae Gray, 1825 - softshell turtles Genus †Palaeotrionyx