original description
Sowerby, J.; Sowerby, J. De C. (1821-1823). The mineral conchology of Great Britain; or, Coloured figures and descriptions of those remains of testaceous animals or shells, which have been preserved at various times and depths in the earth. Vol. IV. Privately published by author, London, pp. 1-160, pls. 307-407., available online at https://www.biodiversitylibrary.org/page/14392771
page(s): 109, pl. 379, fig. 12 [details]
From editor or global species database
Type locality Ipswich, Suffolk, Great Britain; Red Crag (Butleyan), either latest Pliocene or earliest Pleistocene [details]