摘要
根据正型标本的印痕和翻制的模型,重新研究了产于辽宁阜新新邱阜新组的早白垩世真兽类哺乳动物新带氏远藤兽(Endotherium niinomii Shikama,1947)。对照Shikama(1947)的原始描述,将E.niinomii的主要特征归纳为:下臼齿从m1到m3逐渐变小;下三角座和下跟座的高差不是很大;下臼齿的齿尖钝;下原尖比下前尖和下后尖大,并且下前尖和下后尖高度相近;可能有5个前臼齿,并且p3不明显变小。这些特征组合足以将该属与其他的白垩纪真兽类相区别,因此认为Endotherium niinomii是一个有效种。
Reinvestigation of the Early Cretaceous eutherian mammal Endotherium niinomii Shikama,1947,based on the impressions of the type specimen,casts made from the impressions,and the original description,indicates that E.niinomii is characterized by the following characters:decrease in size from the m1 to the m3;a moderate height difference between the trigonid and talonid of lower molars;blunt lower molar cusps;the protoconid being the largest among the trigonid cusps;the paraconid being as tall as the metaconid;the p3 not being obviously reduced;and possible possession of five lower premolars.These characteristics clearly distinguish E.niinomii from other known Cretaceous eutherians,and support its taxonomic identity as a valid taxon.
作者
王元青
楠桥直
金迅
李传夔
濑户口烈司
高春玲
刘金远
WANG Yuan-Qing;KUSUHASHI Nao;JIN Xun;LI Chuan-Kui;SETOGUCHI Takeshi;GAO Chun-Ling;LIU Jin-Yuan(Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences,Institute of Vertebrate Paleontology and Paleoanthropology,Chinese Academy of Sciences Beijing 100044,China;CAS Center for Excellence in Life and Paleoenvironment Beijing 100044,China;College of Earth Sciences,University of Chinese Academy of Sciences Beijing 100049,China;Department of Earth’s Evolution and Environment,Graduate School of Science and Engineering,Ehime University Matsuyama,Ehime 790-8577,Japan;Kyoto Municipal Science Center for Youth Kyoto 612-0031,Japan;Dalian Museum of Natural History Dalian,Liaoning 116023,China)
出处
《古脊椎动物学报》
CSCD
北大核心
2018年第3期180-192,共13页
Vertebrata Palasiatica
基金
中国科学院战略性先导科技专项(B类)(编号:XDB18000000)、国家自然科学基金(批准号:41688103,41541015)、大连市科技计划项目(编号:20044J9JH238)和日本学术振兴会科学研究费补助金若手研究(B)(编号:24740349,16K17830)资助。
关键词
辽宁阜新
早白垩世
阜新组
哺乳动物
真兽类
远藤兽
Fuxin,Liaoning
Early Cretaceous
Fuxin Formation
Mammalia,Eutheria,Endotherium niinomii