Abstract: A new species of Eudinoceras (Pantodonta, Mammalia) is described ih this paper. The material, including left and right maxillas and two upper canines, were collected from the Eocene of Sishui Basin, Shandong province in 1992. The new species is typified by its large size. Upper premolars have prominent conical protocones which are very close to paracones, and of almost the same height as paracones; protolophs and V -shaped lophs of metacones of molars are fully lophoid, mesostyles are isolated and conical, protocones and metacones are relatively lingually located.

摘要： 本文所记述的冠齿兽类化石采集于山东泗水盆地始新世地层中。其个体巨大，前臼齿原尖呈孤立锥形并紧靠前尖，原尖和前尖近等高;臼齿脊形化程度高，中附尖近孤立锥形，原尖和后尖更靠近舌面。据此特征将它归入真恐角兽属，并建立一新种—泗水真恐角兽(Eudinoccras sishuicnsis sp. nov.)。本文将该种与冠齿兽科其它相近属种进行了比较，初步探讨了该科动物演化的可能趋势，并对黄庄动物群时代及与地层有关的问题进行了讨论。