MolluscaBase name details
original description
(of Helix octanfracta Montagu, 1803) Montagu, G. (1803). Testacea Britannica or natural history of British shells, marine, land, and fresh-water, including the most minute: Systematically arranged and embellished with figures. J. White, London, Vol. 1, xxxvii + 291 pp;; Vol. 2, pp. 293–606, pl. 1-16., available online at http://www.biodiversitylibrary.org/item/78694
page(s): 396, pl. II, fig. 8 [details]
basis of record
Leach, W. E. (1852). Molluscorum Britanniae Synopsis. A synopsis of the Mollusca of Great Britain arranged according to their natural affinities and anatomical structure. Van Voorst, London, viii + 376 pp. (edited posthumously by J. E. Gray). , available online at https://www.biodiversitylibrary.org/page/13107076
page(s): 102 [details]