MolluscaBase name details
original description
(of Cyrtolites subplanus Ulrich, 1897 †) 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): 846, pl. 62, fig. 40-44 [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): 107, pl. 7, fig. 26-35; pl. 8, fig. 22-27 [details] Available for editors [request]