Tetrameryx
Tetrameryx is an extinct genus of the North American artiodactyl family Antilocapridae, known from Mexico, the western United States, and Saskatchewan. The name means "four ruminant", referring to the division of each horn near its base into two prongs; in T. shuleri, the rear prong is much longer.
One member of the genus, T. shuleri, survived until about 12,000 years ago, and was present when Paleo-Indians reached North America.
