Traits taxon details
original description
Conrad, T. A. (1841). Fifth annual report on the paleontology of the state of New-York. <em>New York State Geological Survey Annual Report.</em> 5: 25-57. page(s): 51 [details] 
additional source
Williams, H. S.; Breger, C. L. (1916). The fauna of the Chapman sandstone of Maine, including descriptions of some related species from the Moose River sandstone. <em>United States Geological Survey Professional Paper.</em> 89: 1-347., available online at https://doi.org/10.3133/pp89 [details] 
additional source
Isberg, O. (1934). Studien über Lamellibranchiaten des Leptaenakalkes in Dalarna. Beitrag zu einer Orientierung über die Muschelfauna im Ordovicium und Silur. Håkan Ohlssons Buchdruckerei, 493 pp. [details]
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