original description
Grabau, A.W. (1923). Cretaceous fossils from Shantung. <em>Bulletin of the Geological Survey of China.</em> 5(2): 143-181.
page(s): 147-149, textfig. 1 [details]
basis of record
Martinson, G. G. (1961). Mezozoiskie i Kaynozoyskie Molluski Kontinentalnykh Otlozheniy Sibirskoy Platformy, Zabaykalya i Mongolii [Mesozoic and Cenozoic Mollusca of the continental deposits of the Sibirican platform, Transbaikalia and Mongolia]. <em>Trudy Baikal'skoi Limnologicheskoi Stantsii [Transactions of Baikalian Limnologic Station].</em> 19:1–332 p., 26 pl. In Russian.
page(s): 230, 231 [details] Available for editors [request]
From editor or global species database
Type locality "in the gray shales which form the basal part of the Chingshan Formation which disconformably overlies the Laiyang Formation in the Laiyang Valley" [Shandong Province, China] [details]