locality is situated in the northwestern Yunnan of southern China, and specimens of Brachyhyops sp. are recorded from the early middle, or late middle Eocene Xiangshan Formation. No Brachyhyops specimens from the lower to middle Eocene have been recorded from northern Asia; instead, the four remaining localities are all younger (late Eocene) in age and include the southeastern Mongolian taxa B. trofimovi from the Ergilin Dzo Formation at the Khoer Dzan locality and Brachyhyops? sp. from the Ergilin Dzo Formation at the Ergilin Dzo locality. A single taxon, B. neimongolensis, is recorded from the upper Eocene Ulan Gochu Formation of northern China. Lastly, material assigned to ‘Eoentelodon sp.’ (revised as Brachyhyops sp. by Tsubamoto et al.) is recorded from the lower Aksyir ‘svita’ in eastern Kazakhstan, which was later correlated to the late Eocene Ergilian Asian Land Mammal ‘age’ (ALMA) by Emry et al. and Lucas et al. North American distribution Brachyhyops is the oldest entelodont from North America and is recorded exclusively from late Eocene (late Duchesnean – early Chadronian) age deposits. Their geographic range is restricted to western North America and spans from Saskatchewan, Canada to as far south as Big Bend, Texas, USA. A total of nine localities have yielded Brachyhyops material. The Cypress Hills Formation in Saskatchewan, Canada, suggests an early Chadronian age, approximately 37 Ma, and represents the type locality for Brachyhyops viensis as well as the northernmost area in which Brachyhyops specimens have been recorded. Apparently an undocumented Brachyhyops specimen has been recorded from the late Eocene White River Formation of Montana, however, the exact museum location where this specimen is housed remains unknown. Three localities in Wyoming yielded Brachyhyops material and these include a partial skull roof and maxilla from the lower White River Formation (late Eocene) of the Flagstaff Rim, Wyoming. Based on size and tooth shape, these specimens have been assigned to B. viensis. The next locality in Wyoming is the type locality for B. wyomingensis which was recorded from the Big Sand Draw Lentil of the White River Formation at Beaver Divide, and comprises a single skull without mandibles. The third locality yielded cranial fragments that are assigned to B. viensis and were recorded from the lower strata of the White River Formation at Canyon Creek, approximately 50 km east of Beaver Divide. Additional Brachyhyops wyomingensis material was recorded from a single location in northeastern Utah, namely the Lapoint Member