original description
(of Helix duiensis Westerlund, 1897) Westerlund, C. A. (1897). Beiträge zur Molluskenfauna Russlands. (Nach den Sammlungen des Zoologischen Museums der Kaiserl. Akademie der Wissenschaften zu St.-Petersburg). <em>Ezhegodnik Zoologicheskogo Muzeya Imperatorskoi Akademii Nauk (Annuaire du Musée Zoologique de l'Académie Impériale des Sciences de St.-Pétersbourg).</em> 2 (2): 117-143, St.-Petersburg [September]., available online at https://www.biodiversitylibrary.org/page/8651948
page(s): 121 [details]
basis of record
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): 181, Fig. 103D [details] Available for editors [request]
additional source
Kimura, K., Chiba, S., Prozorova, L. & Pak, J. H. (2022). Long-distance dispersal from island to island: colonisation of an oceanic island in the vicinity of the Asian continent by the land snail genus Karaftohelix (Gastropoda: Camaenidae). <em>Molluscan Research.</em> 42(2): 168-174., available online at https://www.tandfonline.com/doi/abs/10.1080/13235818.2022.2066454 [details] Available for editors [request]
From editor or global species database
Type locality Russia, Sakhalin Island, vicinities of Due settlmenent [details]