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报道黔北早志留世中期(Middle Llandovery)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(Late Ashgill)观音桥层四射珊瑚2种--Grewingkia cf. bilateralis Neuman, Brachyelasma cf. medioseptatum(N