Abstract: A new species of Advenimus, A. ulungurensis sp. nov., is described based on dental specimens collected from Tertiary beds on the south bank of the Ulungur River in northern Junggar Basin of the Xinjiang Uygur Autonomous Region of China. These specimens represent the first record of ctenodactyloids in Xinjiang. Correlations with distributions of other species of Advenimus indicate diat the bed yielding the Xinjiang fossils is of probably early Eocene in age.

摘要： 依据采自新班福海县哈拉玛盖乡萨尔多依腊地点第三系的化石，建立了一个啮齿类新种乌伦古河陌生鼠Advenimus ulungurensis sp. nov.。A. ulungurensis为一中等大小的早期梳趾鼠类，齿低冠，下齿列颊齿由前向后逐渐增大;上、下第4前臼齿均次臼齿化;P4具发育的前齿带，前、后尖发育但紧相邻，分别以完整的原脊、后脊与原尖相连。M2前齿带亦发育，前、后尖与分别连接它们的原、后脊无明显界限，不具小尖，次尖小于原尖.下颊齿齿尖较钝。P4跟座较三角座宽;下臼齿下外脊和下中尖弱;下次脊弱，伸