Abstract: Ardynomys,a genus of Cylindrodontidae, is well known from the Paleogene of Mongolia, Kazakhstan and North America, but less so from China. Dawson (1968) and Wang and Wang (1991) reported some Ardynomys specimens from Nei Mongol, but they did not describe them in detail. In order to know the features and phylogenetic position of those specimens, we describe and compare them in this paper.

摘要： 阿尔丁鼠(Ardynomys)是圆柱齿鼠科(cylindrodontids)中较原始的一类，主要分布于亚洲的晚始新世－早渐新世和北美的晚始新世，在亚洲主要发现于蒙古和哈萨克斯坦。虽然Dawson (1968)和王伴月、王培玉(1991)报道了在我国内蒙古也有Ardynomys化石存在，但未描述比较，其性质并不很清楚。为了了解中国的Ardynomys的真正性质，在此对在内蒙古采集的有关标本作简要描述和比较。