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
Upper Jurassic deposits of Gorodishchi and Cretaceous fossils. The layers consistently leaning against each other contain valuable information about evolution between the two geological periods: Jurassic and Cretaceous. Upper Jurassic deposits of Gorodishchi The Exposed Upper Jurassic deposits () near the village of Gorodischi, Ulyanovsk Oblast on the right bank of Kuybyshev Reservoir is one of the protected areas of Ulyanovsk Oblast. The Gorodishchi exposure is within the Ulyanovsk paleontology zakaznik. It is scientifically valuable as a basal section Upper Jurassic adjournment on Russian Platform. Many fossils have been recovered from it, including vertebrae of ichthyosaurs and plesiosaurs, and mollusc shells. The Cambrian deposits are