original description
Sowerby, G. B. I. (1837). On <em>Nematùra</em> of Benson, a new Genus of Univalve Shells. <em>Magazine of Natural History and Journal of Zoology, Botany, Mineralogy, Geology and Meteorology. New series.</em> 1: 217-218., available online at https://www.biodiversitylibrary.org/page/2334909
page(s): 218, textfig. 22c [details]
From editor or global species database
Type locality Orglandes, Manche, and Thiverval-Grignon (Grignon), Yvelines, France; Lutetian, middle Eocene [details]