Prodinoceras

Prodinoceras ("Before Terrible Horns") was the earliest known uintathere genus, which lived in the late Paleocene of Mongolia. It was a relatively small uintathere, reaching 2.9 m (9.5 ft) in length.[1] It is also regarded as the basal uintathere, as, although it had the characteristic fang-like tusks, it had yet to evolve the characteristic knob-like horns.

It is very similar to its North American counterpart, Probathyopsis. All experts regard it as Prodinoceras's sister genus.