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Evolution of Chinese Neogene rhinocerotidae and Its Response to Climatic Variations

Acta Geologica Sinica(English Edition) 2002年第2期76卷 139-145页

作者： W.DOWNS Bilby Research Center Northern Arizona University Flagstaff AZ 86011-6013 USA

Chinese Neogene rhinocerotidae has quite a complete record and its temporalrange is the Early Miocene to Late Pliocene. The samples include 25 species in 4 tribes of 2subfamilies. They are used as a foundation for the study of the evolution of the family and itsrelation to climatic changes. Taxonomic diversity, new records and extinctions are estimated foreach Chinese Neogene mammal faunal unit (NMU). The diversity of Chinese rhinocerotidae variesnoticeably throughout the Neogene and is recognized within five stages: the Middle Miocene and LateMiocene are stages of high diversity and the Early Miocene, early Late Miocene and Pliocene arestages of low diversity. Rhinocerotid diversity and morphology are closely related to environmentalfactors and particularly sensitive to changes in ambient temperature and humidity. Theinterpretation of climatic variation reflected in the evolution of rhinocerotidae correspondsprecisely with the conclusions drawn from other workers and provides new evidence for research onthe Neogene terrestrial ecosystem in China.

关键词： rhinocerotidae Neogene climate China

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A mammalian fossil from the Dingqing Formation in the Lunpola Basin,northern Tibet,and its relevance to age and paleo-altimetry

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Science Bulletin 2012年第Z1期 263-271页

作者： DENG Tao1*,WANG ShiQi1,XIE GuangPu2,LI Qiang1,HOU SuKuan1 & SUN BoYang1,3 1 Key Laboratory of Evolutionary Systematics of Vertebrates,Institute of Vertebrate Paleontology and Paleoanthropology,Chinese Academy of Sciences,Beijing 100044,China 2 Gansu Provincial Museum,Lanzhou 730050,China 3 Graduate University of the Chinese Academy of Sciences,Beijing 100049,China

The distal extremity of a rhinocerotid humerus from the upper part of the Dingqing Formation at the Lunbori locality in Baingoin County,northern Tibet,is the first mammalian fossil found in Cenozoic deposits of the Lunpola *** medial condyle of the distal trochlea of the humerus specimen from Lunbori gradually contracts from medially to *** margin of the medial surface of the medial condyle is not prominent,the well-developed medial epicondyle strongly extends posteriorly,and is divided from the articular facet of the medial condyle by a groove;all of which are characteristic for the *** medial condyle is wide at the bottom and narrow at the *** medial collateral ligament fossa is relatively shallow,and the medial collateral ligament tubercle is very *** medial part of the upper margin of the medial condyle smoothly connects to the bony surface above,but there is no clear boundary between *** of these characteristics are identical with those of *** comparisons imply that the Lunbori specimen is closest to Plesiaceratherium gracile in the Shanwang Fauna from Linqu,Shandong Province,in size and ***,its age is suggested to be the late Early Miocene(Shanwangian Age),about 18-16 *** of the rhinocerotid fossil suggests that the upper part of the Dingqing Formation deposited in the *** adjusting to paleo-temperatures of the Early Miocene,a paleo-ecosystem reconstruction indicates that the paleo-elevation was close to 3000 m in the Lunpola Basin during this time.

关键词： Tibetan Plateau Lunpola Basin paleo-altimetry Miocene Dingqing Formation rhinocerotidae

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