URL: On the Cranial Anatomy of the Polycotylid Plesiosaurs, Including New Material of Polycotylus Latipinnis, Cope, from AlabamaAuthor Names: O'Keefe, F. RobinEra/Period/Epoch: Mooreville ChalkDocument type: AbstractPublication Type: Journal/Periodical ArticlePublication Title: Journal of Vertebrate PaleontologyPublication Volume Number: 24Publication Issue Number: 2Page Numbers:: 326-340Year/month of publication: 2004-07Short title: Plesiosaur Head Anatomy