Restudy of the Middle-Late Ordovician and Llandovery Rugosa Source Area of the Yangtze Region with a Discussion of Some Rugose Coral Genera
详细信息
- 责任者：He Xinyi (China University of Geosciences ; Beijing 100083 ; China) ; Tang Lan
- 刊名：Acta Palaeontologica Sinica
- 出版年：2011
- 卷期：50(1)
- 关键词：四射珊瑚目 ; Tetracorallia ; 中奥陶世 ; Middle Ordovician ; 晚奥陶世 ; Upper Ordovician ; 兰多弗里世 ; Llandoverian ; 扬子地区 ; Yangtze Region
- 页码：p.13-31
- 图表：1 illus., 2 plates, 2 tables, 48 refs.
- 分类号：1103
- issnNo：ISSN0001-6616
- isbnNo：CN32-1188/Q
摘要
The Middle Ordovican to Llandovery rugose corals are abundant in the Yangtze Region, especially in the Llandovery (Aeronian—Telychian). Altogether 113 genera of Rugosa have been reported from the region comprising two genera from the Middle Ordovician, 25 genera from the Late Ordovican and 86 from the Llandovery, about 39 genera first made their appearance in the Yangtze Region from where they dispersed to Central Asia, Europe, North America and other adjacent regions. Together with precious records, this new material strengthens view that the Yangtze Region was a centre of origin for Middle-Late Ordovician and Llandovery rugose corals. The Middle Ordovician Rugosa of this region are characterized by the calostylids Calostylis and Yohophyllum.