[Tetrapoda] Hatschek & Cori 1896 [Gauthier, Kluge & Rowe 1988]
   Amniota Haeckel, 1866 [Gauthier, Kluge & Rowe 1988] - amniotes
     Reptilia Linnaeus 1758 [Gauthier, Kluge & Rowe 1988], nom. cl. inval. see Class Reptilia Linnaeus, 1758
       Eureptilia Olson, 1947
         Romeriida Gauthier, Kluge & Rowe, 1988
           Genus †[Paleothyris] Carroll, 1969
             †Paleothyris acadiana Carroll, 1969