''Antilocapra pacifica'', also known as the Pacific pronghorn, is an extinct antilocaprid from the

Late Pleistocene The Late Pleistocene is an unofficial Age (geology), age in the international geologic timescale in chronostratigraphy, also known as Upper Pleistocene from a Stratigraphy, stratigraphic perspective. It is intended to be the fourth division of ...

California California is a U.S. state, state in the Western United States, located along the West Coast of the United States, Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the List of states and territori ...

Description

The Pacific pronghorn was described in 1991 from material found near the

San Joaquin River The San Joaquin River (; es, Río San Joaquín) is the longest river of Central California. The long river starts in the high Sierra Nevada, and flows through the rich agricultural region of the northern San Joaquin Valley before reaching Suis ...

delta near

Antioch, California Antioch is the third-largest city in Contra Costa County, California, United States. Located in the East Bay region of the San Francisco Bay Area along the Sacramento–San Joaquin River Delta. The city's population was 115,291 at the 2020 Unite ...

. While closely related to the living

pronghorn The pronghorn (, ) (''Antilocapra americana'') is a species of artiodactyl (even-toed, hoofed) mammal indigenous to interior western and central North America. Though not an antelope, it is known colloquially in North America as the American a ...

, it is distinguished by aspects of horn core, orbit and temporal-fossa morphology. The Pacific pronghorn was also slightly larger than its living relative.

References

Pleistocene even-toed ungulates Pronghorns Pleistocene mammals of North America Pleistocene extinctions {{paleo-eventoedungulate-stub