A history of land mammals in the western hemisphere

by William Berryman Scott

The classification of the immense horde of living and extinct genera and species which are referable to the artiodactyls is an extremely difficult problem, which has found no thoroughly satisfactory solution and will not until much more is learned concerning the history of the order and conflicting opinions can be reconciled. The most important American families and genera are given below, though the arrangement is but tentative.

Suborder A. ARTIODACTYLA †PRIMITIVA. (Extinct genera of doubtful affinities)

I. †Trigonolestidæ.

†Trigonolestes, low. Eoc.

II. †Leptochœridæ.

†Leptochœrus, low. Oligo. †Stibarus, low. Oligo.

III. †Dichobunidæ. †Homacodon, mid. Eoc. †Bunomeryx, up. Eoc.

IV. †Anthracotheriidæ.

†Anthracotherium, low. Oligo. †Bothriodon, do. †Arretotherium, do.

V. ?†Oreodontidæ.