Order Testudines Wagler, 1830 - turtles Suborder Pleurodira Cope, 1864 Family Chelidae Gray, 1825 Subfamily Hydromedusinae Baur, 1893 Genus Hydromedusa Wagler, 1830 1 Hydromedusa maximiliani (Mikan, 1825) - Brazilian snake-necked turtle 2 Hydromedusa tectifera Cope, 1870 - South American snake-necked turtle