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近年来,在研究福建中生代含煤地层时,相继发现了双壳类化石,其中有一类个体中等一大,壳表饰有显著的双沟状或同心状脊。以往曾定为Margaritifera,有时误定为Cuopsis。经研究,这一类双壳类应属Qiyangia动物群。分布广泛,层位稳定。 Qiyangia动物群仅发现于福建的中部和南部的五个地点,北部尚未发现。它们的产出情况如下:
In recent years, during the study of the Mesozoic coal-bearing strata in Fujian Province, bivalve fossils have been discovered one after another, of which there are a large number of middle-sized individuals. The surface of the shell exhibits significant double-ditch or concentric ridges. It was Margaritifera in the past, sometimes mistaken for Cuopsis. After research, this type of bivalve should belong Qiyangia fauna. Widely distributed, stable layers. The Qiyangia fauna is found only in five locations in central and southern Fujian, yet not yet found in the north. Their output is as follows: