Species
Extinct

Plesiosaurus pentetarsostinus

nomen oblitum, species not entered Thalassiodracon
Hawkins 1834
This taxon is considered nomen oblitum, species not entered of the valid taxon Thalassiodracon according to the Paleobiology Database. See the page for Thalassiodracon
Bibliography
Original description
T. Hawkins. 1834. Memoirs of Ichthyosauri and Plesiosauri, Extinct Monsters of the Ancient Earth