Traits taxon details
original description
(of ) Conrad, T. A. (1842). Observations on the Silurian and Devonian systems of the United States. <em>Journal of the Academy of Natural Sciences of Philadelphia.</em> 8: 228–280., available online at https://www.biodiversitylibrary.org/page/24623226 page(s): 268, pl. 16, fig. 5 [details]
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