Traits taxon details
original description
(of ) Ulrich, E. O.; Scofield, W. H. (1897). The Lower Silurian Gastropoda of Minnesota. <em>The Geology of Minnesota.</em> 3(2): 813-1081, pls. 61-82., available online at https://www.biodiversitylibrary.org/page/14923788 page(s): 921, pl 63, figs. 50, 51; pl. 64, figs. 40-43 [details]
basis of record
Wahlman G.P. (1992). Middle and Upper Ordovician symmetrical univalved mollusks (Monoplacophora and Bellerophontina) of the Cincinnati Arch region. <em>United States Geological Survey Professional Paper.</em> 1066-O: 1-213. page(s): 172, pl. 34, fig. 1-13 [details] Available for editors 
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