#uintatheres

Uintatheriidae were the largest land animals of their time, surviving from the late Paleocene into the Uintan Epoch of the Middle Eocene.   They were heavy animals, with thick legs, massive bones, broad feet, and tiny brains. The most distinctive feature of the great majority of species, however, was the presence of multiple blunt "horns", perhaps similar to the ossicones of modern giraffes, and the presence of large, saber-like canine teeth. They were eventually replaced as large browsing animals by the brontotheres. - Wikipedia

Prodinoceras. An early member of Dinocerata, Prodinoceras was around the size of a modern tapir, making it one of the biggest animals in Asia during the Paleocene epoch (directly after the end-Cretaceous mass extinction event). It possessed long canines that were protected by flanges on the lower jaw, but didn't yet have the same bony skull knobs like later uintatheres.