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. 1875. The Vertebrata of the Cretaceous formations of the west. Report of the United States Geological and Geographical Survey of the Territories 2:1-303
DOI ↗