original description(ofGena nebulosa A. Adams, 1850)Adams, A. (1850). An arrangement of Stomatellidae, including the characters of a new genus, and of several new species. <em>Proceedings of the Zoological Society of London.</em> 18 (1850): 29-40., available online athttp://biodiversitylibrary.org/page/12858705 page(s): 38-39. [details]