GIVETIAN (DEVONIAN) RUGOSE CORALS FROM WANGYOU, HUISHUI, GUIZHOU (2)

The Givetian (late Middle Devonian) Wenglai Formation at Wangyou and Wenglai areas, Guizhou Province, South China is characterized by the predominance of terrestrial clasts, such as argillaceous sandstone and sandy mudstone, and abundant solitary rugose corals but very few colonial forms. The present study describes the rugose corals from the upper part of Wenglai Formation, following our previous paper on its lower part. The upper part of Wenglai Formation correlates to the Jiwozhai member in Dushan County, Guizhou Province, and is late Givetian in age, which is determined by the occurrence of the solitary rugose coral Sinospongophyllum and typical Givetian brachiopod Stringocephalus at the bottom of the upper part of the Wenglai Formation. The skeletal structure of this Sinospongophyllum is very similar to that of typical Givetian rugose coral Endophyllum, but differs in external forms. Both Sinospongophyllum and Endophyllum occur roughly in the conodont lower varcus Biozone. In this study, we describe 13 species belonging to 8 genera of rugose corals. They are: Calceola in-termediata inflata Yoh, Cystiphylloides kwangsiense Yoh, C. secundus (Goldfuss), C. sp., Paramixogonaria wangyouensis sp. nov., Grypophyllum? sp., Mictophyllum shawoziense He, M. sp., Sinospongophyllum planotabulatum Yoh, Temnophyl-lum waltheri Yoh, T. poshiense Wang, T. complicatum Wang and Thamnophyllum crassum (Kong). Most of these species share close affinity with their contemporary species occurring from the other regions of South China, as well as from the other regions of Asia, and from Europe, North Africa, Australia and the western part of the North America, indicating that they all belong to the Old World Realm.

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