Traits taxon details
original description
(of ) Sardeson F.W. (1892). The range and distribution of the Lower Silurian fauna of Minnesota with descriptions of some new species. <em>Minnesota Academy of Natural Science Bulletin.</em> 3: 326-343. page(s): 337, pi. 6, figs. 1, 2 [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): O78, pl. 2, fig. 15, 16 [details] Available for editors 
additional source
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): 832, pi. 61, figs. 14, 15 [details]
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