This animal, like all glyptodonts, had a strong dorsal armor composed of numerous osteoderms fused together.

The genus was characterized by an almost cylindrical caudal tube, obtuse and covered of small and raised osteoderms separated by wide and deep furrows.

The osteoderms of the carapace resembled those of the genus Trachycalyptus, remarkably wrinkled and strongly punctuated, with a barely distinct central figure, less dotted than the peripheral area.

In the species Urotherium simile, the osteoderms had lost their sutures and resembled those of Glyptodon.

Urotherium was a genus of glyptodont of uncertain affinities, variously placed within the tribes Neuryurini, Hoplophorini and Lomaphorini.