Utahraptor ostrommaysi Variant:Hand-painted The exact cause of their

The exact cause of their extinction is unknown

Longitud 212 mm

Secodontosaurus willistoni was a medium-sized animal

known as the "devil frog"

Utahraptor ostrommaysi Variant:Hand-painted The exact cause of theirUtahraptor 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,