Montenegrina sturanyana gropana, Feher, Zoltan & Szekeres, Miklos, 2016

Feher, Zoltan & Szekeres, Miklos, 2016, Taxonomic revision of the rock-dwelling door snail genus Montenegrina Boettger, 1877 (Mollusca, Gastropoda, Clausiliidae), ZooKeys 599, pp. 1-137 : 99

Taxon classification Animalia Stylommatophora Clausiliidae

Montenegrina sturanyana gropana ssp. n. Fig. 34M

Diagnosis.

Small, slender subspecies with often overlapping lamellae superior and spiralis, and a basalis separate from the lunella complex.

Description.

The small, slender, light corneous shell consists of 9½ to 11½ whorls. The entire surface is smooth, except for the weakly inflexed neck that is finely striate-costate. The basal crest is well developed, the peripheral one is recognizable. The peristome is somewhat angular, attached, its margin is wide and swollen. The lamellae superior and spiralis often overlap. In front view the straight descending lamella inferior is moderately emerged. The retracted, medium-bent lamella subcolumellaris is only barely visible through the aperture. The broad, dorsolateral-lateral to lateral lunella is not fused to the short basalis. The plica superior can reach forward somewhat farther than its attachment to the lunella. The subclaustralis and sulcalis are residual. The anterior plica superior is absent, or weak, parallel to the principalis, separate from the lunella complex. The clausilium plate cannot be viewed through the aperture.

Dimensions

(in mm). Holotype Hs: 14.9, Ws: 3.6, Ha: 3.7, Wa: 2.8; paratypes (HNHM 99503, n = 12): Hs: 13.2-16.3 (mean 14.7, S.D. 1.00), Ws: 3.0-3.7 (mean 3.4, S.D. 0.24), Ha: 3.0-3.7, Wa: 2.3-2.9.

Differential diagnosis.

The new subspecies can be distinguished from Montenegrina sturanyana sturanyana by the presence of an anterior plica superior, from Montenegrina sturanyana ostrovicensis by its deeper lunella, and from both taxa by the slender shell and the presence of the basalis.

Type locality.

Albania, Tiranë District, Gropa Mts, Bizë, gorge of the Kaprol Stream near a military camp, 1250 m, 41.3392°N, 20.1989°E.

Type material.

Type locality, leg. ZF, TK, DM, 20.vi.2012, holotype (HNHM 99502), paratypes (HNHM 99503/75+7a+13aj, NHMW 111230/5); Bulqizë District, Çermenikë Mts, between Bizë and Ballenjë, near a cave, 1370 m, 41.3604°N, 20.2412°E, leg. ZF, TK, DM, 20.vi.2012, paratypes (HNHM 99504/25+11a+3aj, NHMW 111229/4, SZ/2).

Etymology.

The new taxon is named after the Gropa Mts in Central Albania.

Distribution.

Gropa-Bizë-Martanesh mountain group in Central Albania. Known from two nearby sites around the village Bizë in Central Albania (Fig. 33).