original description
Richardson, G. F. (1843). Geology for beginners. Second edition. London: Longman, Brown, Green & Longmans; New York: Wiley & Putnam; 616 pp. + 261 figs., available online at https://books.google.de/books?id=XycqAAAAYAAJ
page(s): 504, fig. 243 [details]
From editor or global species database
Type material Knight & Morris (2020) designated a neotype (Natural History Museum London, NHMUK PI L43170). Obviously unaware of that act, Hodges (2022) did so as well (British Geological Survey, BGS Zd2181); the latter designation is invalid. [details]