Dinoceras

Dinoceras, the type genus of an extinct suborder of huge herbivorous Ungulata (q.v.) discovered in 1870 in Eocene rocks in Wyoming by Professor O. C. Marsh. Seven species have been described. They had five toes on each foot; the femur and tibia in a straight line, as in the elephant; somewhat elongated nasal bones, but apparently no proboscis; three pairs of rounded horn-cores, which probably had horny sheaths; the upper canines prolonged into powerful tusks, the points of which rest against an expanded margin of the lower jawbone; and a remarkably diminutive brain-cavity. They equalled the elephant in size.