Taxonomic history of the genus Osteopygis (original ) (raw ) After Hirayama, 1997, and Parham, 2005†_Osteopygis_ Cope, 1868
†_Lytopoma_ Cope, 1870(?)
†_Catapleura_
†_Propleura_
†_Erquelinnesia_ Hay, 1908(?)
†_Osteopygis emarginatus_ Cope, 1868
†_Chelone sopita_ Leidy, 1865 (nomen vanum)
†_Osteopygis sopita_ (Leidy); Cope, 1868 (nomen vanum)
†_Osteopygis emarginatus_ Cope, 1868
†_Osteopygis chelydrinus_ Cope, 1868
†_Osteopygis platylomus_ Cope, 1868
†_Lytopoma angusta_ Cope, 1870
†_Osteopygis erosus_ Cope, 1875
†_Catapleura chelydrina_ Cope, 1875
†_Osteopygis gibbi_ Wieland, 1904
†_Propleura borealis_ Wieland, 1904
†_Osteopygis borealis_ (Wieland?) Hay, 1908
†_Osteopygis robustus_ Hay, 1908
†_Lytopoma wielandi_ Hay, 1908
†_Erquelinnesia molaria_ Hay, 1908 Reference(s):
Hirayama, R., 1997: Distribution and diversity of Cretaceous chelonioids. 225-243.in Callaway, J. M. & Nicholls, E. L., (eds.), 1997: Ancient marine reptiles. –Academic Press, San Diego, 1997, pp. xlvi - 501