MolluscaBase taxon details
original description
Logan, W.N. (1900). The stratigraphy and invertebrate faunas of the Jurassic Formation in the Freeze-Out Hills of Wyoming. <em>University of Kansas Quarterly.</em> 9(2): 109-134., available online at https://www.biodiversitylibrary.org/page/8581969 page(s): 134, pl. 31, figs 7, 9 [details]
basis of record
Yen, T.-C. (1952). Molluscan Fauna of the Morrison Formation. <em>United States Geological Survey Professional Paper.</em> 233-B: 21-51. page(s): 36 [details] Available for editors [request]
additional source
Henderson, J. (1935). Fossil non-marine Mollusca of North America. <em>Geological Society of America Special Papers.</em> 3: 1-313. page(s): 74; note: as "knightii" [details] Available for editors [request]
From editor or global species database
Type locality "The Freeze-out Hills, of Wyoming; also Black Hills, Dakota", USA; Morrison Fm., Late Jurassic [details]
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