甘肃庆阳晚中新世大唇犀属(奇蹄目,犀科)一新种（英文）  

A new species of Chilotherium(Perissodactyla, Rhinocerotidae) from the Late Miocene of Qingyang, Gansu, China

作　　者：孙丹辉 李雨[1,3] 邓涛 SUN Dan-Hui;LI Yu;DENG Tao(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;CAS Center for Excellence in Life and Paleoenvironment Beijing 100044;University of Chinese Academy of Sciences Beijing 100049;Department of Earth Sciences,Nanjing University Nanjing 210023)

机构地区：[1]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 [2]中国科学院生物演化与环境卓越创新中心,北京100044 [3]中国科学院大学,北京100049 [4]南京大学地球科学系,南京210023

出　　处：《古脊椎动物学报》2018年第3期216-228,共13页Vertebrata Palasiatica

基　　金：国家自然科学基金重点项目(批准号:41430102)、中国科学院战略性先导科技专项(B类)(编号:XDB26000000)和中国科学院前沿科学重点研究项目(编号:QYZDY-SSW-DQC022)资助。

摘　　要：报道并描述了大唇犀属一新种——桑氏大唇犀(Chilotherium licenti sp.nov.),材料为桑志华于1920年在甘肃庆阳晚中新世地层中采集到的一件关联寰椎的成年头骨和一件成年下颌骨。新种除了具有下颌联合部强烈扩展,i2巨大且内刃上翻,原尖收缩强烈,前刺和小刺发育,前附尖褶和前尖肋微弱等大唇犀属的典型特征之外,还具有前刺和小刺发育并连接形成中凹(P2-M2),内外齿带退化等特征。新种的进步特征显示其属于大唇犀属内高度特化的种群,其时代属于保德期,对应于欧洲的MN12-13。根据形态特征对比以及系统发育分析,推断来自晚中新世的桑氏大唇犀是大唇犀属内最进步的类群。An adult skull with articulated atlas and an adult mandible,collected by Emile Licent in 1920 from the Late Miocene of Qingyang(Gansu,China),is recognized as a new species Chilotherium licenti sp.nov.These specimens possess typical characters of the genus Chilotherium,such as the strongly expanded mandibular symphysis,the huge and dagger-shaped i2s with an upturned medial flange,strongly constricted protocones,well-developed crochet and crista,and weakly developed parastyle folds and paracone ribs.Chilotherium licenti is characterized by the near absence of lingual and buccal cingula,and the medifossette on P2 to M2 forming by well-developed crochet and crista.The derived characters of the new species indicate that it is the highly specialized taxon of the genus Chilotherium,corresponding to MN12–13 of the Turolian in Europe.Based on a phylogenetic analysis of rhinocerotids,C.licenti from the Late Miocene is the most derived species in the known species of the Chilotherium lineage.

关 键 词：甘肃庆阳 晚中新世 犀科 大唇犀属 

分 类 号：Q915.877[天文地球—古生物学与地层学]