Reptilia Laurenti, 1768
Archaeothyris Reisz, 1972
Clepsydrops Cope, 1875
Echinerpeton Reisz, 1972
Ophiacodon Marsh, 1878
Poliosaurus Case, 1907
Protoclepsydrops Carroll, 1964
Theropleura Cope, 1878
