Phylum Mollusca. Class Bivalvia. Xibei Diqu gu shengwu tuce: Shaan-Gan-Ning fence. [Paleontological atlas of Northwest China. Part 3. Mesozoic and Cenozoic], Geological Publishing House, Peking, 1982: 3-28. Chapter pagination: 3-28. 19 [Zoological Record Volume 119]