Traits taxon details
original description
(of ) Whitfield R.P. (1889). Observations on some imperfectly known fossils from the Calciferous sandrock of Lake Champlain, and descriptions of several new forms. <em>Bulletin of the American Museum of Natural History.</em> 2:41-63. page(s): 46, pl. 7, figs. 15-17 [details]
basis of record
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): 829, 836 [details]
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