Revision of the " Chloritis delibrata (Benson, 1836) " group (Gastropoda, Stylommatophora, Camaenidae) Author Pall-Gergely, Barna https://orcid.org/0000-0002-6167-7221 Plant Protection Institute, Centre for Agricultural Research, Herman Otto Street 15, Budapest, H- 1022, Hungary pallgergely2@gmail.com Author Ablett, Jonathan D. https://orcid.org/0000-0002-7277-1934 Mollusca Section, Invertebrates Division, Department of Life Sciences, The Natural History Museums, London SW 7 5 BD, UK Author Szabo, Marton Hungarian Natural History Museum, Department of Paleontology and Geology, Ludovika ter 2, Budapest 1083, Hungary Author Neubert, Eike https://orcid.org/0000-0002-0277-2894 Natural History Museum of the Burgergemeinde Bern, Bernastr. 15, CH- 3005 Berne, Switzerland & Institute of Ecology and Evolution, University of Bern, 3012 Bern, Switzerland text ZooKeys 2022 2022-02-15 1086 1 31 http://dx.doi.org/10.3897/zookeys.1086.77180 journal article http://dx.doi.org/10.3897/zookeys.1086.77180 1313-2970-1086-1 0AFF7CFB9400477F81160120C393C4FD BD013F15E39C5B5FBE666837836810E1 Bouchetcamaena fusca Pall-Gergely sp. nov. Figure 12 Type material. Holotype : Munipur [India, Manipur], coll. Godwin-Austen, NHMUK 1903.7.1.391/2 (D: 16.8 mm, H: 8 mm, mixed lot with B. delibrata , NHMUK 1903.7.1.391/1). Paratypes : same data as holotype, NHMUK 1903.7.1.391/3 (1 shell: paratype); Gaziphima, Naga Hills, Munipur frontier line, coll. Godwin-Austen, NHMUK 1903.7.1.385 (2 paratypes); Khasi Hills, coll. Godwin-Austen, no. 183, NHMUK 1903.7.1.381a/2 (1 shell, mixed lot with B. delibrata , NHMUK 1903.7.1.381a/1); Manipur, coll. Godwin-Austen, NHMUK 20191134 (1 shell). Diagnosis. Shell small to medium-sized, with flat dorsal side or very slightly elevated spire; thick, brown, matt periostracum makes hair scars practically invisible, aperture oval. Description. Shell small to medium-sized; depressed-globular, dorsal side flat or spire very slightly elevated; body whorl slightly or relatively strongly but bluntly shouldered; colour brownish due to thick, matt periostracum; protoconch consists of 1.5 whorls, finely wrinkled, with short hairs near suture; in some specimens wrinkles only visible in the middle of whorls, whereas in others hair scars (pits) are also discernible; entire shell consisting of 3.75-4 whorls, suture moderately deep; short hairs visible in the suture and inside umbilicus; hair scars practically invisible due to thick periostracum; in one paratype (NHMUK 1903.7.1.391) periostracum of lighter colour around each hair scar on the ventral side, making the density of scars visible; very few hair scars visible at the parietal callus, but to a much lesser degree than in other species; aperture oval/subrectangular; peristome expanded and slightly reflected in direction of umbilicus; palatal part with a very thin, whitish, semi-transparent layer; hair scars not visible beneath parietal callus; umbilicus open, relatively narrow, peri-umbilical keel only very slightly indicated. Figure 12. Bouchetcamaena fusca Pall-Gergely sp. nov., holotype (NHMUK 1903.7.1.391/2). For positions of close-up images see Fig. 6 (F = DM, G = CA, H: LV, I: PC). Measurements. D = 15.3-18.7 mm, H = 7.8-8.8 mm (n = 5). Differential diagnosis. Bouchetcamaena raripila sp. nov. is most similar to B. fusca sp. nov. in having a relatively small shell, narrow umbilicus and brown periostracum, but it differs in the strong, sparsely standing hair scars. All other Bouchetcamaena species have larger, lighter-coloured shells and a wider umbilicus. Etymology. The new species is named after its dark ( fuscus in Latin) periostracum. Distribution. Seems to be restricted to Manipur, the Khasi and the Naga Hills (India).