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Re: Diagnosis of Polyptychodon
In a recent description of a gigantic pliosaur from the Late Cretaceous
Western Interior Sea, Bruce Schumacher reviewed the status of the
*Polyptychodon*. It was considered as dubious by Welles (1962) in his
review of Cretaceous plesiosaurs, and Schumacher (2008) agreed with this
statement because *Polyptychodon continuus* (type species of the genus)
was erected on an isolated and undiagnostic pliosaurid tooth by Owen
(1861). The status and taxonomic position of other European
*Polyptychodon* need to be reevaluated.
I can send you the pdf, if you need it.
Reference (and references herein):
Schumacher B.A. 2008. On the skull of a pliosaur (Plesiosauria;
Pliosauridae) from the Upper Cretaceous (Early Turonian) of the North
American Western Interior. Transactions of the Kansas Academy of Science
111(3 & 4):203-218.
Michael Lange a écrit :
I'am looking for a diagnosis of the pliosaurid plesiosaur Polyptychodon. Does
anyone know if there is a recent paper or phD thesis where a diagnosis of the
genus is included?