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《Quaternary Sciences》 1999-02
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AN AGENESIS OR CLADOGENESIS:HOMINID FOSSIL EVIDENCE FROM CHINA

Zhang Yinyun(Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing 100044)  
Recently, traditional view of hominid evolution has been challenged by the finds and datings from some fossil sites in China.Biostratigraphic, thermolnminescence, uranium series and ESR datings gave agesof 0.200-0.300Ma B.P. to Hexian Homo erectus. For Chaohu early Homo sapiens,the uranium series datings yielded an age of 0.160-0.200Ma B.P., however, a newresult of dating is 0.310Ma B.P. and suggests an age as old as Hexian.The layer 2 of deposits at Homo erectus site of Zhoukoudian has a date of0.220Ma B. P., and the top deposits have been assigned younger ages, less than0.200Ma B.P. For the early Homo sapiens of Jinniushan, ESR datings have providedage in excess of 0.200Ma B.P., and suggest a possible overlap in ages of erectus andsapiens.The Lantian fossils are from two sites: Gongwangling and Chenjiawo. Palaeomagneticdatings have give ages 0.650Ma B.P. and 0.530Ma B.P. for Chenjiawo and 0.7500-800Ma B.P. or 0.980Ma B.P. for Gongwangling.Two hominid crania from Yunxian were believed to be that of Homo erectus.Faunal datings indicatod an age as old as Lantian erectus, and the ESR datings haveprovided an age of 0.581Ma B.P. An exdrination has shown that the Yunxian craniamay represent sapiens.The fossil evidence in China shows that the erectus persisted as late as 0.200MaB.P., and the sapiens appeared as early as 0.310Ma B.P. even can be beed back to0.581Ma B. P.The overlap in ages of erectus and sapiens suggests that the anagenetic evolutionaryprogression is unlikely in the genus Homo if erectus and sapiens are considered asdifferent species.
【Fund】: 中国科学院古生物与古人类学科基础研究特别支持费!9604
【CateGory Index】: Q981
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