[2][3] According to Mihlbachler and others,[4][5] Megacerops includes the species of the genera Menodus, Brontotherium, Brontops, Menops, Ateleodon, and Oreinotherium.

[6]: 666  Its skull reached 89.5 cm (35.2 in) in greatest length, with some specimens possessing substantial canines, up to 70 mm long.

[6]: 494, 523  Megacerops resembled a large rhinoceros, possessing blunt Y-shaped horn-like protrusions on its nose up to 43 cm in length.

[6]: 553  Its mass is estimated to be in the range of 3.3–3.8 t (3.6–4.2 short tons) [7][8] The dorsal vertebrae above the shoulders had extra long spines to support the huge neck muscles needed to carry the heavy skull.

Life-sized models of Megacerops families (a male, female, and juvenile) are displayed at the James E. Martin Paleontological Research Laboratory, South Dakota School of Mines & Technology, and a different set at the Canadian Museum of Nature.