Conrad, T. A. (1838). Report of T. A. Conrad on the Palaeontological Department of the Survey. <em>Documents of the Assembly of the State of New-York.</em> 61(200): 107-119., available online athttps://books.google.de/books?id=A0gbAQAAIAAJ[details]
original descriptionConrad, T. A. (1838). Report of T. A. Conrad on the Palaeontological Department of the Survey. <em>Documents of the Assembly of the State of New-York.</em> 61(200): 107-119., available online athttps://books.google.de/books?id=A0gbAQAAIAAJ[details]
basis of recordUlrich, 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 athttps://www.biodiversitylibrary.org/page/14923788 page(s): 860, pl. LXII, figs. 27-31 [details]