青海柴达木盆地西南缘祁曼塔格山一带的上石炭统分下部缔敖苏组和上部四角羊沟组，该组的珊瑚化石自下而上可分两组合：１）Ｂｒａｄｙｐｈｙｌｌｕｍ ｓｔｅｒｅｏｍａｒｇｉｎａｔｕｍ－Ｃｙｓｔｏｐｈｏｒａｓｔｒａｅａ ｍｏｌｌｉ－Ｓｋｏｌｅｋｏｐｈｙｌｌｕｍ ｂｕｌｌｉｔａｂｕｌａｔｕｍ组合，２）Ａｍｙｇｄａｌｏｐｈｙｌｌｏｉｄｅｓ ｍａｎｇｎａｉｅｎｓｅ－Ｎｅｏｋｏｎｉｎｃｋｏｐｈｙｌｌｕｍ ｐｅｔｉｌｕ

The present paper deals with the rugose corals found from the Upper Carboniferous Diaosu and Sijiaoyanggou Formations in Eastern Kunlunshan, China. There are 3 genera, 3 species, including 2 new species and 1 indeterminate species in the Diaosu Formation; and 7 genera, 6 species and 3 indeterminate species in the Sijiaoyanggou Formation. The rugose coral bearing Sijiaoyanggou and Diaosu Formations of this region can be divided in ascending order into the following 5 limestone beds: Sijiaoyanggou Formation (C 2 2) Bed 4. Grey median to thick bedded finely crystalline dolomite interecalated with bright mud crystalline bioclastic limestone, yielding the following corals: Amygdalophylloides raricystatum sp.nov., Ramiphyllum pendulum sp.nov., Axolithophyllum sp. and Neokoninckophyllum sp. 29m Bed 3. Grey median to thick bedded bright mud crystalline bioclastic limestone, containing the following corals: Amygdalophylloides mangnaiense sp.nov., Neokoninckophyllum petilum Cocke and Orygmophyllum multiseptatum sp.nov. 6.2m Bed 1. Grey thin to median bedded crystalline bioclastic limestone containing the following coral: Amygdalophylloides rarricystatum sp.nov.5.5m Diaosu Formation (C 1 2) Bed 4. Light thin to median bedded crystalline bioclastic limestone, containing the following coral: Cystophorastraea molli (Stuckenberg)27.14m Bed 3. Grey median to thick bedded crystalline bioclastic limestone yielding the following corals: Bradyphyllum stereomarginatum sp.nov.and S. sp.18.33m Based on the characteristics of the rugose corals, 2 assemblages may be established for the Upper Carboniferous Diaosu and Sijiaoyanggou Formations respectively.

Q915.813.3