四川马角坝地区飞仙关组的双壳类动物群

THE BIVALVE FAUNA OF FEIXIANGUAN FORMATION IN MAJIAOBA AREA,JIANGYOU,SICHUAN

文章简述了四川江油马角坝地区下三叠统飞仙关组中的双壳类化石组合特征，描述了１新种（Ｃｌａｒａｉａｊｉａｎｇｙｏｕｅｎｓｉｓ）和１新亚种（Ｃｌａｒａｉａｓｏｎｇｐａｎｅｎｓｉｓｍａｇｎｕｓ），划分出两个双壳类化石带（Ｐｓｅｕ－ｄｏｃｌａｒａｉａｗａｎｇｉ带和Ｅｕｍｏｒｐｈｏｔｉｓｍｕｌｔｉｆｏｒｍｉｓ－Ｃｌａｒａｉａａｕｒｉｔａ－Ｃｌａｒａｉａｓｔａｃｈｅｉ带）。

The Feixianguan Formation in Lower Triassic Series is over developed with abundant bivalve fossils in the Majiaoba area, Jiangyou, Sichuan. This paper describes the bivalve fossil assemblages of Early Triassic in this region. Two bivalve fossil zones ( Pseudoclaraia wangi zone, Eumorphotis multiformis Claraia aurita C.stachei zone) are divided and one new species and one new subspecies described.