Traits name details
original description
Hall, J.; Whitfield, R. P. (1875). Descriptions of invertebrate fossils, mainly from the Silurian system. <em>Report of the Geological Survey of Ohio.</em> 2(2): 65-157, pl. 1., available online at https://www.biodiversitylibrary.org/page/13674854 page(s): 86-87, pl. 2, fig. 18 [details]
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