Amphiscopus sturmii marmoratus, Ruud, A. Bank, Henk P. M. G Menkhorst & Eike Neubert, 2016

Ruud, A. Bank, Henk P. M. G Menkhorst & Eike Neubert, 2016, Descriptions of new and little-known land snail taxa from Turkey, and establishment of a new genus (Gastropoda, Pulmonata: Lauriidae, Enidae and Vitrinidae), Basteria 80 (1), pp. 5-30 : 20

Amphiscopus sturmii marmoratus subspec. nov. ( Fig. 15)

Type locality & type material. – Turkey, Vilayet Kütahya, Örencik, western part , 950 m (39.4426°N 29.0662°E), B. Hausdorf leg., 21.ix.1987. Holotype NMBE 544670/1 , paratypes NMBE 54467/5, HMK/2, RBA/*2, ZMH/33.

Diagnosis. – A subspecies of A. sturmii characterized by the whitish/ marbled colour of the shell, the less well-developed parietal callus and the absence of an impression at the last whorl.

Description. – Shell dextral, turreted, with a relative wide, open, slit-like umbilicus. The 8.3-10.1 whorls are rather convex with a moderately deep suture. Teleoconch with densely packed, rather pronounced, oblique striae; there are no spiral striae. Shell solid, not translucent, glossy, upper part of the teleoconch horny yellow coloured, the remaining part of the teleoconch whitish/ marbled coloured, but below the periphery (i.e. the part of the whorl below the insertion of the palatal peristome) again more horny yellow; there is a prominent white band behind the peristome. The last whorl does not have an impression near the palatalis superior. Peristome not or hardly reflected (with the exception of the columellar part), robustly thickened by a labial callus, the columellar and palatal insertion connected by a clearly visible callus which is often more thickened near the columellar peristome. The subangularis is tear-like and vertically pointing downwards; it is connected with the palatal peristome by a thin callus. The subangularis and parietalis are not connected. The parietalis is well developed, and only moderately deeply recessed. Palatalis superior well thickened, but not deeply recessed. There is no spiralis, infrapalatalis, basalis or columellaris. The columellar ledge reaches halfway or above the middle of the columellar side of the aperture.

Measurements (n = 11). – H = 6.7-9.0 (mean 7.8); LWH = 3.0-3.5 (mean 3.3); MH = 1.9-2.2 (mean 2.1); LWD = 2.3-2.7 (mean 2.4); LWM = 2.3-2.8 (mean 2.6); MD = 1.5-1.8 (mean 1.6); NW = 8.3-10.1 (mean 9.2).

Localities. – Vilayet Kütahya: type locality (see above); 4 km E. Köprüören, 1020 m (39.5115°N 29.8137°E) (ZMH/>50).

Derivatio nominis. – Named after the marble-like colour of the shell.

Differentiation. – Amphiscopus sturmii sturmii has a uniform dark-brown coloured shell, more convex whorls, a more prominent parietal callus, and the last whorl has a more or less faint impression at the position of the palatalis superior. Amphiscopus substurmii is sinistral and has the same colour pattern as A. sturmii sturmii .