Montenegrina sporadica tropojana, 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 : 96

Taxon classification Animalia Stylommatophora Clausiliidae

Montenegrina sporadica tropojana ssp. n. Fig. 28K

Diagnosis.

Small, elongate subspecies with weakly inflexed neck, retracted lamella subcolumellaris, missing basalis and subclaustralis.

Description.

The small, elongate, light brownish-corneous shell has 9½ to 11 whorls. The lower three whorls are nearly of the same width. The entire surface of the shell is smooth, except the finely striate-costate neck. The neck is weakly inflexed, the basal and peripheral crests are also wealky developed. The light brownish, simple peristome is ovoid to somewhat angular, broadly attached, its upper columellar margin is missing. The lamellae superior and spiralis do not overlap. The moderately emerged terminal part of the lamella inferior descends in a straight line. In front view the medium-bent lamella subcolumellaris is not visible. The plica principalis is often fused to the superior. The broad lunella is dorsolateral-lateral to lateral. The plicae basalis and subclaustralis are absent. The sulcalis is strong. The anterior part of the plica superior is missing or weak, separate from the lunella complex. The clausilium plate is barely visible through the aperture.

Dimensions

(in mm). Holotype Hs: 13.9, Ws: 3.4, Ha: 3.2, Wa: 2.5; paratypes (NHMW 111225, n = 12): Hs: 13.0-16.0 (mean 14.9, S.D. 0.94), Ws: 3.1-3.8 (mean 3.4, S.D. 0.22), Ha: 3.0-3.6, Wa: 2.2-3.7.

Differential diagnosis.

The new subspecies differs from Montenegrina sporadica sporadica by its more elongate and smoother shell, retracted lamella subcolumellaris, deeper lunella, and the occasional presence of the anterior plica superior.

Type locality.

Albania, Tropojë District, gorge of the Përroi i Tropojës, ca. 14 km N of Tropojë, 970 m, 42.4740°N, 20.1520°E.

Type material.

Type locality, leg. DA, ZF, JG, 26.vi.2014, holotype (NHMW 111224), paratypes (NHMW 111225/4+9rf, HNHM 99493/9, GR/10, SZ/2); ca. 13 km N of Tropojë, 930 m, 42.4692°N, 20.1554°E, leg. DA, ZF, JG, 26.vi.2014, paratypes (NHMW 111226/4+26aj, HNHM 99494/3, SZ/1); Gash region, upper valley of the Përroi i Tropojës, 1100 m, 42.4749°N, 20.1518°E, leg. ZB, Lunk, DP, Schmidt, 6.viii.2009, paratype (HNHM 99495/1).

Etymology.

The new subspecies is named after the Tropojë Stream, in the gorge of which the type locality is located.

Distribution.

Mt. Shkëlzen in the eastern part of the Prokletije in northeastern Albania. Known only from the limestone gorge of the Tropojë Stream (Fig. 32).