A history of land mammals in the western hemisphere

by William Berryman Scott

The subjoined table gives the families and principal genera of the American Perissodactyla; extinct groups are marked †.

Suborder CHELODACTYLA. Normal Perissodactyls

I. Equidæ. Horses.

†Eohippus, low. Eoc. †Orohippus, mid. Eoc. †Epihippus, up. Eoc. †Mesohippus, low. Oligo. †Miohippus, up. Oligo. †Anchitherium, up. Oligo. †Parahippus, low. Mioc. to low. Plioc. †Desmatippus, mid. Mioc. †Hypohippus, mid. Mioc. to low. Plioc. †Merychippus, mid. Mioc. to low. Plioc. †Protohippus, up. Mioc. †Pliohippus, up. Mioc. and low. Plioc. †Neohipparion, up. Mioc. and low. Plioc. †Hipparion, Plioc. †Hippidion, Pleist., S. Amer. †Hyperhippidium, Pleist., S. Am. Equus, Pleist., N. and S. Amer.

II. †Titanotheriidæ. †Titanotheres.

†Lambdotherium, low. Eoc. †Eotitanops, low. Eoc. †Palæosyops, mid. Eoc. †Telmatherium, mid. Eoc. †Dolichorhinus, up. Eoc. †Diplacodon, up. Eoc. †Titanotherium, low. Oligo.

III. Tapiridæ. Tapirs.

†Systemodon, low. Eoc. †Isectolophus, mid. and up. Eoc. †Protapirus, Oligo. †Tapiravus, mid. Mioc. Tapirus, Pleist., N. Amer., Pleist. and Recent, S. Amer.

IV. †Lophiodontidæ. †Lophiodonts.

†Heptodon, low. Eoc. †Helaletes, mid. Eoc. †Colodon, low. Oligo.