【摘要】 报道黔北早志留世中期 (MiddleLlandovery)地层中新发现的四射珊瑚 7属———Cantrillia ,Neocantrillia,Prototryplasma,Pycnostylus,Dalmanophyllum ?,Rhegmaphyllum ,Schlotheimophyllum ,并描述产自黔东北石阡奥陶纪末期 (LateAshgill)观音桥层四射珊瑚 2种———Grewingkiacf.bilateralisNeuman ,Brachyelasmacf.mediosep tatum(Neuman)及晚奥陶世 (EarlyAshgill期 )涧草沟组中首次发现的四射珊瑚Crassilasmasp .。全文共描述四射珊瑚 13属 18种 ,其中 6新种 ,它们是Crassilasmafenggangensesp .nov .,C .crebrumseptatumsp .nov .,Dinophyl luminsolitumsp .nov .,Neocantrilliasiluricasp .nov .,Prototryplasmaguizhouensesp .nov .,Schlotheimophyllumregeneranumsp .nov .。更多还原

【Abstract】 genera of rugose corals are reported from the middle Llandovery in northern Guizhou Province of China for the first time. They are Cantrillia,Neocantrillia,Prototryplasma,Pycnostylus,Dalmanophyllum?, Rhegmaphyllum and Schlotheimophyllum. In addition, two species(Grewingkia cf. bilateralis(Neuman) and Brachyelasma cf. medioseptatum(Neuman) ) collected from the late Ashgill Guanyinqiao Beds in the Shiqian County of northern Guizhou Province, and one species(Crassilasma sp.)from the early Ashgill Jiancaogou (Jiantsaohou) Formation in the same area are described. These data enrich further the content of the Late Ordovician and Early Silurian rugose coral fauna in Yangtze region, and are considerably significant for study on origin, evolution and disperse of some Early Paleozoic rugose corals. Altogether 18 species assigned to 13 genera are described. Among them 6 species are new. They are Crassilasma fenggangense sp. nov., C. crebrumseptatum sp. nov., Dinophyllum insolitum sp. nov., Neocantrillia silurica sp. nov., Prototryplasma guizhouense sp. nov., and Schlotheimophyllum regeneranum sp. nov.更多还原