内蒙古二连浩特呼尔井组的大哺乳动物化石  

LARGE MAMMALS FOUND FROM HOULDJIN FORMATION NEAR ERENHOT,NEI MONGOL,CHINA

作　　者：王伴月[1] 邱占祥[1] 张全中 吴丽君 宁培杰 

机构地区：[1]中国科学院古脊椎动物与古人类研究所,脊椎动物进化系统学重点实验室,北京100044 [2]二连恐龙博物馆,二连浩特011100

出　　处：《古脊椎动物学报》2009年第2期85-110,共26页Vertebrata Palasiatica

基　　金：中国科学院知识创新工程重要方向项目(编号:KZCX2-YW-120);国家自然科学基金重点项目(编号:40730210)资助

摘　　要：记述了近年来采自二连浩特附近呼尔井组中的大哺乳动物化石:Hyaenodon sp.,Metatitan sp.,Aprotodon lanzhouensis,Symphysorrhachis?sp.,Cadurcodon houldjinensis sp.nov.和Entelodon gobiensis。新种Cadurcodon houldjinensis的主要特征是:个体大,齿冠高,上前臼齿外壁无明显的肋;上臼齿前附尖和前尖肋窄而紧靠;下臼齿外中沟弱;内齿带高,封闭内谷;具外齿带;m1下三角座稍短于下跟座Matthew和Granger(1923)所记述之Cadurcotherium sp.和Cadurcotherium?sp.标本被分别归入Cadurcodon houldjinensis和C.ardynensis。对呼尔井组迄今所发现的哺乳动物化石的分析表明,该组的时代应为晚始新世。The Houldjin Formation was discovered and named by the Third Asiatic Expedition in 1922. Its geological age was first considered as Miocene or later, then varied from Oligocene to Late Eocene because of scarcity of mammalian fossils found in that formation. Since 1985, some additional mammalian fossils have been found. These discoveries have throw more light on its age determination. The micromammalian fossils have already been reported. The large mammalian fossils, except paraceratherines, are described here.

关 键 词：内蒙古 晚始新世 哺乳功物 

分 类 号：Q915.873[天文地球—古生物学与地层学]