original description
Yen, T.-C. (1952). Molluscan Fauna of the Morrison Formation. <em>United States Geological Survey Professional Paper.</em> 233-B: 21-51.
page(s): 44 [details] Available for editors [request]
From editor or global species database
Classification Yen (1952) classified the genus in (marine!) Otinidae, which was doubted by Dayrat et al. (2011). [details]