Tetracynodon tenuis Ceratosaurus El registro fósil del Daspletosaurus

El registro fósil del Daspletosaurus torosus proviene principalmente de Alberta

As a sauropod

junto con un cráneo alargado y pico sin dientes

se cree que Isisaurus se alimentaba de plantas

Tetracynodon tenuis Ceratosaurus El registro fósil del DaspletosaurusTetracynodon tenuis was a small therapsid of the cynodont group that lived during the Late Permian Period and possibly briefly survived the mass extinction event that marked the boundary with the Triassic , approximately 252 million years ago. Its fossils have been found in South Africa, a region that has provided much evidence of the transition from mammal like reptiles to the first mammals. Tetracynodon represents one of the earliest cynodonts and