Order Testudines Wagler, 1830 - turtles Suborder Cryptodira Cope, 1868 Superfamily Testudinoidea Batsch, 1788 Family Emydidae Rafinesque, 1815 - pond turtles Subfamily Emydinae Rafinesque, 1815 Genus Terrapene Merrem, 1820 Terrapene coahuila Schmidt & Owens, 1944 - Coahuilan box turtle