副跑犀（学名：Subhyracodon）是一种已经灭绝的犀牛，大约生活在3,300万年前的中新世。副跑犀的体型比爪兽科与渐雷兽还小，也没有鼻角。

• 巴德兰国家公园

Subhyracodon is an extinct genus of cow-sized rhinoceroses. With a length of 2.4 m (8 ft) and a weight estimated of 381.3 kg (in S. mitis), it was a tapir-sized herbivore on the plains of early Oligocene South Dakota 33 million years ago (White River Fauna), smaller than only the Brontops and the chalicotheres. Subhyracodon had no horns, relying more on its speed to escape, but a species found at Wind Cave National Park had a pair of bony nasal ridges. The genera Caenopus and Aceratherium were both synonymized with Subhyracodon