Laopteryx Laopteryx Laopteryx is the name assigned to a pterosaur (flying reptile) from the Upper Jurassic Morrison Formation of Wyoming, United States; it was originally thought to be a bird. The genus was named in 1881 by Othniel Charles Marsh. The generic name is derived from Greek "laas", "stone", and "pteryx", "wing". The full species name given by Marsh was "Laopteryx priscum"; the specific name meaning "of venerable age" in Latin. However, Marsh incorrectly used the neuter form, while "pteryx" is feminine in Greek. (See grammatical gender.) This was in the 19th century emended to an, also incorrect, masculine "priscus" and
South Polar region of the Cretaceous diversity terrestrial flora and fauna of the Late Cretaceous polar region. Seymour Island is similar in this respect, the area of discovery for vertebrate and invertebrate creatures–such as plesiosaurs–of the Late Cretaceous, extending into the Eocene. Other Cretaceous fossil-bearing formations in Antarctica are the Snow Hill Island Formation, the Lopez de Bertodano Formation, and the Hidden Lake Formation, also on James Ross Island. The Eumeralla Formation of Dinosaur Cove and the Wonthaggi Formation in Victoria, Australia, contain a number of dinosaur fossils and tracks from the Early Cretaceous. The Tahora Formation represents the reptile assemblage of Cretaceous New Zealand. The