Utahraptor ostrommaysi Variant:Hand-painted It also had flexible joints

It also had flexible joints between the upper and lower jaws

y no es casual: este animal es conocido por poseer una de las estructuras bucales más extrañas jamás vistas en un vertebrado

known as the "devil frog"

and had a streamlined body with large eyes and a well-developed caudal fin

faces off against a Stegosaurus

Utahraptor ostrommaysi Variant:Hand-painted It also had flexible jointsUtahraptor 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,