Megacerops

From Palaeos.org

o Hippomorpha
`--o Brontotheriidae
   |--Eotitanops
   |--Palaeosyops
   |?-Protitanops
   `--+?-o Metatelmatheriinae
      |  |?- Sthenodectes
      |  `-- Metatelmatherium
      |--o Dolichorhininae
      |  |-- Mesatirhinus
      |  `-- Dolichorhinus
      `--+?-o Embolotheriinae
         |  |--+-- Epimanteoceras
         |  |  `-- Dolichorhinoides
         |  `--+--o †Protitan
         |     `--+-- Gnathotitan
         |        `--+--o Rhinotitan
         |           `--+--Parabrontops
         |              `--+--Aktautitan
         |                 `--+--+--Brachydiastematherium 
         |                    |  `-- Metatitan
         |                    `--Embolotherium
         `--o Telmatheriinae
            |--Telmatherium
            `--+--Pseudodiplacodon
               `--+?- Notiotitanops
                  `--+--Duchesneodus
                     `--+--Brontops
                        |--Menops
                        `--Megacerops 

Male and female Megacerops coloradensis (synonym = Brontotherium gigas), of the Late Eocene of North America. (C) Stanton F. Fink

Megacerops ('large horn face') is an extinct genus of North American brontotheriid mammal. Males had two blunt horns on their snout.

According to the references listed here, Megacerops includes the species of the genera Menodus, Brontotherium, Brontops, Menops, Ateleodon, and Oreinotherium

References

• Mihlbachler, M.C. 2004. Phylogenetic Systematics of the Brontotheriidae (Mammalia, Perissodactyla). Ph.D. Dissertation, Columbia University. 757 pp.

• Mihlbachler, M.C. , S.G. Lucas, and R.J, Emry. 2004a. The holotype specimen of Menodus giganteus, and the “insoluble” problem of Chadronian brontothere taxonomy. In S.G. Lucas, K. Zeigler, and P. E. Kondrashov (eds.), Paleogene Mammals. Bulletin of the New Mexico Museum of Natural History 26: 129-136.