|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Mammalia - Artiodactyla - Antilocapridae
If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
|J. C. Merriam 1909||Frontals not cavernom< at the base of the horns. Horns situated o.n the upper posterior region of the orbits, sloping back- ward, slightly outward, and tilted upward at an angle between twenty-five and thirty degrees from the plane of the frontals above the orbits. Horn cores flattened in a plane extending backward and inward from the orbits. A short distance above the base the horn cores flare or widen slightly in the direction of greatest diameter in cross-section. Outer anterior edge of the horn core arising over the upper posterior region of the orbit, and swinging backward with a suggestion of a twist. Surface of the horn core comparatively smooth, with a few pits or irregu- larities. Texture of the outer portion of the born core solid. Supraorbital foramina present in front of the middle of the antero-medial side of the base of the horn cores.|