Tetracynodon tenuis Patagotitan supported by formidable neck and

supported by formidable neck and jaw muscles

its locomotor morphology suggests that it was a relatively agile animal

perdura en los registros fósiles

but detailed anatomical studies demonstrated sufficient differences to justify its separation into the genus Giraffatitan

Tetracynodon tenuis Patagotitan supported by formidable neck andTetracynodon 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