Yin T.H. (1932). Gastropoda of the Penchi and Taiyuan series of North China. <em>Paleontologia Sinica.</em> B11(2): 1-33. page(s): 20, pl. II, figs. 21-23 [details]
original descriptionYin T.H. (1932). Gastropoda of the Penchi and Taiyuan series of North China. <em>Paleontologia Sinica.</em> B11(2): 1-33. page(s): 20, pl. II, figs. 21-23 [details]
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