Over the following years, Owen published descriptions of the most important fossils, naming several as new species. He described the fossils from Punta Alta as including a nearly perfect head and three fragments of heads of "Megatherium Cuvierii", the jaw of a related species which Owen named "Mylodon Darwinii", and jaws of "Megalonyx Jeffersonii". The near-complete skeleton was named "Scelidotherium" by Owen, who found that it had most of its bones nearly in their proper relative positions. At the nearby Monte Hermoso beds, numerous rodents included species allied to the Brazilian tuco-tuco and the capybara.