The Lycoptera-bearing bed lies over the upper part of the Upper Jurassic, which has been verified by the fossil evidence such as the Nestoria-Keratestheria fauna and the Ostracod Eoparacypris-Luanpingella-Darwinula assemblage from the Debei gou Formation
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李佩贤 苏德英.1994.狼鳍鱼（Lycoptera）岩层的时代归属[J].地质学报,68(1). Li Peixian, Su Deying, Li Yougui, Yu Jingxian.1994. THE CHRONOSTRATIGRAPHIC STATUS OF THE Lycoptera-BEARING BED[J]. Acta Geologica Sinica,68(1).
