Traits name details
original description
Sowerby, J. De C. (1840). Organic remains described and engraved by Mr. James de Carle Sowerby. In: Prestwich, J. The Geology Of Coalbrook Dale. <em>Transactions of the Geological Society of London, Series 2.</em> 5: pls. LII-LVII., available online at https://www.biodiversitylibrary.org/page/36236119 page(s): pl. 53, fig. 3 [details]
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