Order Testudines Wagler, 1830 - turtles
   Suborder Pleurodira Cope, 1864
     Family Chelidae Gray, 1825
       Subfamily Chelinae Gray, 1825
         Genus Mesoclemmys Gray, 1873
           01 Mesoclemmys dahli (Zangerl & Medem, 1958) - Dahl's toad-headed turtle
           02 Mesoclemmys gibba (Schweigger, 1812) - gibba turtle
           03 Mesoclemmys heliostemma (McCord, Joseph-Ouni & Lamar, 2001) - yellow-crowned toad-headed turtle
           04 Mesoclemmys hogei (Mertens, 1967) - Hoge's side-necked turtle
           05 Mesoclemmys nasuta (Schweigger, 1812) - Guyanan toad-headed turtle
           06 Mesoclemmys perplexa Bour & Zaher, 2005 - Cerrado side-necked turtle
           07 Mesoclemmys raniceps (Gray, 1856) - Amazon toad-headed turtle
           08 Mesoclemmys tuberculata (Luederwaldt, 1926) - tuberculate toad-headed turtle
           09 Mesoclemmys vanderhaegei (Bour, 1973) - Vanderhaege's toad-headed turtle
           10 Mesoclemmys zuliae (Pritchard & Trebbau, 1984) - Zulia toad-headed turtle