黔南紫云、晴隆晚石炭世及早二叠世四射珊瑚

THE LATE CARBONIFEROUS AND EARLY PERMIAN RUGOSE CORALS FROM ZIYUN COUNTY AND QINGLONG COUNTY, SOUTH GUIZHOU

通过对黔南地区晚石炭世及早二叠世早期四射珊瑚的研究 ,建立 4个四射珊瑚组合 ,自下而上为 :1)Antheria Pseudotimania组合 ;2 )Nephelophyllum Eokepingophyllum组合 ;3)Parawentzellophyllum Kepingophyllum组合 ;4)Anfractophyllum组合。组合 1、2以Cyathopsidae科分子和Kepingophyllidae科的原始分子为主 ;组合 3以Kepingophyllidae科的典型分子为代表 ;组合 4以Kepingophyllidae的进化型分子为特征。文中描述四射珊瑚 9新种及 1未定种。

Abundant rugose corals including 33 genera and 77 species were collected in 1988 from the fusulinid Montiparus zone to Brevaxina dyhrenfurthi subzone in South Guizhou. Among these species, 10 species are here described as new. Based on stratigraphical distribution of these rugose corals, 4 assemblage zones can be recognized as follows in ascending order: 1) Antheria Pseudotimania Assemblage 2) Nephelophyllum Eokepingophyllum Assemblage 3) Parawentzellophyllum Kepingophyllum Assemblage 4) Anfractophyllum Assemblage 1) and 2) assemblages are dominated by Cyathopsidae taxa Pseudozaphrentoides, Botherophyllum and Caninophyllum as well as primitive representatives of Kepingophyllidae. It is noteworthy that some pioneers of Waagenophyllidae and Wentzellophyllidae have occurred in the Assemblage 2). Assemblage 3) is represented by typical elements of Kepingophyllidae, including Kepingophyllum, Parawen tzellophyllum , and Diversiphyllum. Taxa belonging to Cyathopsidae and those primitive representatives of Kepingophyllidae are significanlly decreased in number in this assemblage. Assemblage 4) is dominated by such advanced representatives of Kepingophyllidae as Anfractophyllum and Szechuanophyllum.