This genus was named after Samuel Wendell Williston

romper madera degradada o acceder a nidos de insectos sociales

Width 120 mm

Los fósiles de Saurophaganax se han encontrado en América del Norte

Utahraptor ostrommaysi Kosmoceratops This genus was named afterUtahraptor ostrommaysi was one of the largest known dromaeosaurids and one of the most representative predators of the Early Cretaceous of North America. Its remains come from the Cedar Mountain Formation in eastern Utah, especially from the Yellow Cat Member, in deposits associated with continental environments of floodplains, river channels, and semi arid ecosystems with seasonal wetlands. Formally described by Kirkland, Gaston, and Burge in 1993,