MolluscaBase name details
original description
Anthony, J.G. (1855). Descriptions of new species of Ancylus and Anculosa, from the western states of North America. Annals of the Lyceum of Natural History of New York, 6: 158-160, plate 5., available online at https://www.biodiversitylibrary.org/page/16023748
page(s): 158, pl. V, figs. 20-21 [details]