Order Testudines Wagler, 1830 - turtles Suborder Cryptodira Cope, 1868 Superfamily Kinosternoidea Agassiz, 1857 Family Kinosternidae Agassiz, 1857 - mud and musk turtles Subfamily Staurotypinae Gray, 1869 Genus Claudius Cope, 1865 [monotypic] Claudius angustatus Cope, 1865 - narrow-bridged musk turtle