Jiang, D.-Y. Motani, R. Hao, W.-C. Rieppel, O. Sun, Y.-L. Schmitz, L. Sun, Z.-Y. 2008 First record of Placodontoidea (Reptilia, Sauropterygia, Placodontia) from the Eastern Tethys Journal of Vertebrate Paleontology 28 904-908 Pachypleurosaurs Simosaurus Nothosaurus Placodus_gigas Placodus_inexpectatus Paraplacodus Cyamodus Henodus Macroplacus Placochelys Protenodontosaurus Psephoderma Osteology Maximum Parsimony Based on reanalysis of the original matrix. Jiang_etal_2008a