Genus level: Species level: The shrub-ox (Euceratherium collinum) is an extinct species of ovibovine caprine native to North America and China during the Pleistocene epoch.

[1] The species is considered to be closely related to the living muskox, as well as extinct genera like Bootherium.

[2] The earliest fossils of the genus are known from the Early Pleistocene of China, from which it is then suggested to have migrated into North America.

[2] Late Pleistocene shrub-ox remains are known from fossil finds spanning from what is now northern California to central Mexico.

[3] On the basis of preserved dung pellets, it has been established that they were browsers with a diet of trees and shrubs.