Abstract: While visiting the American Museum of Natural History (AMNH) in May and June, 2001, invited by Dr. R. H. Tedford, the authors were able to make a survey of the fossils collected by the 3rd Central Asiatic Expedition during the 1920s. Among them some undescribed specimens of Entelodontidae were recovered. They were labelled as found from late Eocene deposits of Nei Mengol in 1928. Eocene entelodontids were poorly known in Asia. These specimens are important not only because they represent a new taxon, but also they cast new light on the affinity between Asian and North American entelodonts.

摘要： 记述了在我国内蒙古沙拉木仑地区晚始新世乌兰戈楚组中发现的狶科化石———内蒙古短面狶(新种) ( Brachyhyops neimongolensis sp. nov. ) 。新种的主要特征是:下颌骨深,前臼齿部分更缩短,下缘明显斜向前上方,颊齿主尖高锐,脊形,上臼齿梯形,已形成原脊,原尖位置靠后,M3 具次尖,后齿带弱。研究表明Eoentelodon 和Brachyhyops 在下颌骨具骨质突起的刍形,前部缩短,下颌骨联合达p3 ,p3 与p4 彼此紧靠,下臼齿的下前尖与下后尖明显分开,以及上颊齿的形态上