Ce taxon est considéré comme nomen vanum, species not entered
du taxon valide Plesiosauria
selon la Paleobiology Database.
Voir la fiche de Plesiosauria →
Bibliographie
Description originale
E. D. Cope. 1876. On some extinct reptiles and Batrachia from the Judith River and Fox Hills Beds of Montana. Proceedings of the Academy of Natural Sciences of Philadelphia 28:340-359