Vertebrate Fossil Leptauchenia sp. Upper Brule Formation, White River Badlands, Chadron Nebraska Area The Oreodonta is an extinct suborder of mammal in Order Artiodactyla, and therefore distantly related to pigs, hogs, camels, hippopotamuses, and the pig-like peccaries. Over 50 species of Oreodonta have been described.
Russian Devonian fish - Batrioleptis | Luga river, St. Petersburg region, Russia | Russian Fossil Museum http://paleoart.com/static/paleozoic-mezozoic_russian_vertebrate_fossils/russian_devonian_fish_batrioliptis.htm
Prognathodon Mosasaur Skeleton A medium to large-sized mosasaur, with the skull length reaching 1.5 meters and the total body length up to around 10 meters; the skull was massive and proportionately large.It had protective bony rings surrounding its eye sockets, indicating it lived in deep water. Its teeth are similar to those of some Triassic placodonts, so it may have lived a similar lifestyle, feeding on shellfish, large fish, and sea turtles
Brazilosaurus is an extinct genus of mesosaur which lived during the early Permian (Artinskian stage) of what is now Brazil. It is known from a skeleton recovered from the Assistencia Member of the Irati Formation (Hanayama Farm, Tatuí, São Paulo). It was named by T. Shikama and H. Ozaki in 1966 and the type species is Brazilosaurus sanpauloensis
Plesiosaur tooth - Precious opal pseudomorph - From the Coocoran Opal Fields, Australia