中国早石炭世的四射珊瑚组合及主物古地理

中国早石炭世的四射珊瑚可划分为六个组合带，自下而上依序为。１）Ｃｅｒｉｐｈｙｌｌｕｍ　ｅｌｅｇａｔｕｍ　　　　（ＭｅｎｉｓｃｏｐｈｙｌｌｕｍｘｉｎｊｉＡｎｇｅｎｓｅ带大致与之相当），２）Ｃａｎｉｎｉａ　ｄｏｒｌｏｄｏｔｉ或Ｋａｓｓｉｎｅｌｌａ－　　Ｌｏｐｈｏｐｈｙｌｌｕｍ　ｄｅｎｓｕｍ，３）Ｃｙｓｔｏｈｒｅｎｔｉｓ或Ｅｎｙｇｍｏｐｈｙｌｌｕｍ－Ｋａｋｗｉｐｈｙｌｌｕｍ　ｑｉｎｇｈ－ａｉｅｎｓｅ，４）Ｐｓｅｕｄｏｕｒａｌｉｎｉａ　或Ｓｉｐｈｏｎｏｐｈｙｌｌｉａ　ｏｐｐｒｅｓｓａ，５）Ｔｈｙｓａｎｏｐｈｌｌｕｍ　ａｓｉａｔｉｃｕｍ或Ｏｒｉｎａｓｔｒａｅａ　ｈａｉｔｏｕｔａｌａｅｎｓｉｓ－Ｄｏｒｌｏｄｏｔｉａ，６）Ｙｕａｎｏｐｈｙｌｌｕｍ．图乃阶和韦则阶的分界　　或Ｏｒｉｎａｓｔｒａｅａ，６）Ｙｕａｎｏｐｈｙｌｌｕｍ．图乃阶和韦则阶的分界　　划在Ｓｉｐｈｏｎｏｐｈｙｌｌｉａ　ｏｐｐｒｅｓｓａ带的顶部．ＹｕＡｎｏｐｈｙｌｌｕｍ带的时代自韦则晚期延伸至纳缪尔早　　　　期。根据珊瑚动物群的特征区分出三个生物地理区，即天山－祁连区、巴颜喀喇－三江区和扬子　　区，各区相应的代表分予分别为Ｓｉｐｈｏｎｐｈｙｌｌｉａ　ｏｐｐｒ?

EARLY CARBONIFEROUS CORAL ASSEMBLAGES AND PALEOBIOGEOGRAPHY OF CHINA

The Early Carboniferous Rugosa of China may be grouped into six asse- mblage zones: 1)Meniscophyllum xinjiangense of Ceriphyllum elegatum,2) Kassimella-Lophophyllum densum of caninia dorlodoti,3)Enygmophyllum- Kakwiphyllum qinghaiense or Caninia dorlodoti,4)Siphonophyllia oppressa of Pseudouralin ia,5)Orionastraea huaitoutalaensis-dorlodotia or Thysanoph yllum asiaticum,6)Yuanophyllum.The boundary between the Tournaisian and the Visean is at the top of the Siphonophyllia oppressa Zone,and the Yuanophyllum Zone ranges from the Late Visean to Early Namurian. Three biogeographic provinces, the Tianshan-Qilian, the Bayankela -Sanjiang and the Yangtze, are being distinguished, which are represented by Siphonophy llia oppressa -Gangamophyllum,Siphonophyllia-Pseudouralinia and Pseudour- alinia -Kueichouphyllum respectively.The main controlling elements of the biogeographic provinces, isolation of the ocean or the continent. ecological coditidn, an d convergence in parallel evolution are discussed,