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. 1894. On the structure of the skull in the plesiosaurian Reptilia, and on two new species from the Upper Cretaceous. Proceedings of the American Philosophical Society 33:109-113