MolluscaBase taxon details
original description
(of Hyalinia difficilis O. Boettger, 1888) Boettger, O. (1888). Diagnosen neuer kaukasischer Arten. <em>Nachrichtsblatt der Deutschen Malakozoologischen Gesellschaft.</em> 20 (9/10): 149-155. Frankfurt am Main [September/October]., available online at https://www.biodiversitylibrary.org/page/15599802
page(s): 150 [details]
additional source
Sysoev, A. V. & Schileyko, A. A. (2009). Land snails and slugs of Russia and adjacent countries. <em>Sofia/Moskva (Pensoft).</em> 312 pp., 142 plates. [June] [= Pensoft Series Faunistica No 87].
page(s): 126, Fig. 63D [details] Available for editors [request]