unaccepted (Invalid: junior homonym of Cylindrella Pfeiffer, 1840 [Gastropoda, Urocoptidae] and placed on the Official Index by ICZN Opinion 1030; Asprella is a replacement name)
Swainson, W. (1840). A treatise on malacology; or the natural classification of shells and shell-fish. Longman, London, viii + 419 pp., available online athttp://www.biodiversitylibrary.org/item/33450 page(s): 311 [details]
original descriptionSwainson, W. (1840). A treatise on malacology; or the natural classification of shells and shell-fish. Longman, London, viii + 419 pp., available online athttp://www.biodiversitylibrary.org/item/33450 page(s): 311 [details]