Talk:Polycotylus

Species
Polycotylus ischiadicus was made the type species of the new genus Thalassiosaurus by Welles (1943), while the name Plesiosauus ichthyospondylus is a nomen nudum because Seeley (1869) provided a type specimen but did not accompany it with a description and indicated that his taxa were never intended to take taxonomic precedence.

H.G. Seeley, 1869, Index to the Fossil Remains of Aves, Ornithosauria, and Reptilia from the Secondary System of Strata, arranged in the Woodwardian Museum of the University of Cambridge. III, Cambridge University Press

S. P. Welles. 1943. Elasmosaurid plesiosaurs with description of new material from California and Colorado. Memoirs of the University of California 13:125-254. 68.4.61.168 (talk) 19:33, 11 May 2012 (UTC)Vahe Demirjian

True or false
Is it true that it is also found in Russia and Australia or is this a mistake?
 * Did you bother to read the paper in the source?--Mr Fink (talk) 20:48, 13 July 2015 (UTC)