云南晚中新世一巨型竹鼠  

A giant bamboo rat from the latest Miocene of Yunnan

作　　者：劳伦斯J.弗林 李强[2] Jay KELLEY Nina G.JABLONSKI 吉学平 Denise F.SU 王晓鸣[2,6] Lawrence J.FLYNN;LI Qiang;Jay KELLEY;Nina G.JABLONSKI;JI Xue-Ping;Denise F.SU;WANG Xiao-Ming(Department of Human Evolutionary Biology,Harvard University,Cambridge MA 02138,USA;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;Institute of Human Origins and School of Human Evolution and Social Change,Arizona State University Tempe,AZ 85287,USA;Department of Anthropology,The Pennsylvania State University University Park,PA 16802,USA;Kunming Natural History Museum of Zoology,Kunming Institute of Zoology,Chinese Academy of Sciences,Kunming 650201,China;Department of Vertebrate Paleontology,Natural History Museum of Los Angeles County 900 Exposition Blvd.,Los Angeles,CA 90007,USA)

机构地区：[1]哈佛大学人类演化生物学系,马萨诸塞州剑桥02138 [2]中国科学院古脊椎动物与古人类研究所,中国科学院脊椎动物演化与人类起源重点实验室,北京100044 [3]亚利桑那州立大学人类起源研究所及人类演化与社会变化学院,坦佩85287 [4]宾夕法尼亚州立大学人类学系帕克分校,16802 [5]中国科学院昆明动物研究所昆明动物博物馆,昆明650201 [6]洛杉矶自然历史博物馆古脊椎动物学系,洛杉矶90007

出　　处：《古脊椎动物学报（中英文）》2023年第4期277-283,共7页Vertebrata Palasiatica

基　　金：第二次青藏高原综合科学考察专项(编号:2019QZKK0705);中国科学院战略性先导科技专项(B类)(编号:XDB26000000);国家自然科学基金(批准号:41430102);美国国家科学基金(1227927)资助。

摘　　要：云南昭通盆地水塘坝地点的褐煤沉积出产中新世末期脊椎动物化石。为增加小哺乳动物的样品,我们在2014年对出产化石的沉积物开展尝试性筛洗。通过筛洗,获得了4颗竹鼠的牙齿。这种竹鼠个体极大,远大于水塘坝已知的竹鼠,代表了一个新种。新种的臼齿尺寸明显大于所有已知的Miorhizomys种类,臼齿高冠,齿沟内充填白垩质,不甚前后向压缩。新种在水塘坝的出现年代为6.2-6.7 Ma。这一发现显示,在约6 Ma现生属Rhizomys在山西北部地区出现之前,已绝灭的Miorhizomys就展现出了较高的多样性。The Shuitangba subbasin lignite deposits of the Zhaotong Basin in northern Yunnan Province have produced vertebrate fossils of terminal Miocene age.We conducted test wet screening of fossiliferous sediment in 2014 to increase representation of small mammals.This effort produced four teeth of a very large bamboo rat,much larger than the previously known bamboo rat present at Shuitangba,and representing a new species.This new species is characterized by its molars being remarkably larger than those of other known species of Miorhizomys,and being hypsodont with cementum,and less anterorposteriorly compressed.The age of this new species from Shuitangba is in the range of 6.2 to 6.7 Ma.It appears that diverse bamboo rats of the extinct genus Miorhizomys were present in the Late Miocene of Yunnan,somewhat before the 6 Ma appearance of extant Rhizomys to the north in the vicinity of Shanxi Province.

关 键 词：云南 水塘坝 晚中新世 小哺乳动物 竹鼠 

分 类 号：Q915.873[天文地球—古生物学与地层学]