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描述了采自河北阳原和蔚县的双壳类化石２新种，根据共生的动物群的讨论，化石所在地层的时代为中侏罗世。
Described are two new bivalve fossils from Yangyuan and Yuxian, Hebei Province. Based on the discussion of symbiotic fauna, the epoch of the fossil formation is Middle Jurassic.