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桂西北早中二叠世常么期和栖霞期地层为一套浅海碳酸盐岩相连续沉积，其中类化石十分丰富，自下而上可划分为５个化石带、４个亚带：１）Ｐａｍｉｒｉｎａ－Ｓｃｈｗａｇｅｒｉｎａ带（Ｐａｍｉｒｉｎａｐｕｌｃｈｒａ亚带；Ｓｃｈｗａｇｅｒｉｎａｃｕｓｈｍａｎｉ亚带）；２）Ｓｃｈｗａｇｅｒｉｎａｇｕｅｍｂｅｌｉ带；３）Ｃｈａｌａｒｏｓｃｈｗａｇｅｒｉ－ｎａ－Ｒｏｂｕｓｔｏｓｃｈｗａｇｅｒｉｎａ带（Ｃｈａｌａｒｏｓｃｈｗａｇｅｒｉｎａｖｕｌｇａｒｉｓ亚带；Ｒｏｂｕｓｔｏｓｃｈｗａｇｅｒｉｎａｌｏｎｇｌｉｎｅｎｓｉｓ亚带）；４）Ｂｒｅｖａｘｉｎａｄｙｈｒｅｎｆｕｒｔｈｉ带；５）Ｍｉｓｅｌｉｎａｃｌａｕｄｉａｅ带。同时对命名地点常么组的定义、时代及岩相特征、生物群面貌进行了讨论。
The Permian normal period and Qixia Formation in the northwestern Guangxi Province are a set of shallow marine carbonate sedimentary facies, in which the fossils are very rich and can be divided into five fossil zones from bottom to top, with four subbands: 1) Pamirina-Schwagerina belt (Pamirinapulchra sub-belt; Schwagerinacushmani sub-belt); 2) Schwagerinaguembeli belt; 3) Chalaroschwageri-na-Robustoschwagerina belt (Chalaroschwagerinavulgaris sub-belt; Robustoschwagerinalonglinensis sub-belt); 4) Brevaxinadyhrenfurthi belt; At the same time, we discuss the definition, age and lithofacies characteristics and the biome appearance of the often-named group in the named place.