Consisting of a partial jawbone and a humerus, and dating to the mid-Eocene (~47 million years ago), the remains clearly belonged to an early even-toed ungulate – but one much bigger than the rabbit-sized herbivores known from that time. This was something closer in size and build to a large modern pig, standing at least 1m tall at the shoulder (3’3″).
It turned out to belong to a member of a somewhat obscure lineage known as the helohyids, a group whose evolutionary relationships are a bit uncertain but are generally considered to be part of the whale-and-hippo lineage. These pig-like animals were large opportunistic omnivores, possibly occupying a similar ecological role to the later entelodonts, with some Late Eocene forms reaching sizes comparable to black bears.
It was one of the earliest known large-bodied members of the group, and shows that these animals must have increased in size very rapidly during their early evolution, going from rabbit-sized to pig-sized within just a couple of million years.