Montenegrina rugilabris gregoi, 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 : 77

Taxon classification Animalia Stylommatophora Clausiliidae

Montenegrina rugilabris gregoi ssp. n. Fig. 28C

Diagnosis.

Medium-size, tumid subspecies with costate apical whorls, long overlapping lamellae superior and spiralis, and in front view visible lamella subcolumellaris.

Description.

The medium-size, tumid, light corneous shell consists of 9½ to 11½ whorls. The surface of the lower whorls varies between almost smooth to indistinctly costate with widely spaced, wrinkle-like ribs. The apex is and the weakly inflexed neck are strongly costate. The basal and peripheral crests are weak. The wide-rimmed peristome is almost circular, its upper margin is narrowly attached. There is a long overlap between the lamellae superior and spiralis. The moderately emerged lamella inferior and the broadly-bent subcolumellaris are both well visible in front view. The dorsal lunella is fused to the basalis, which is much longer than the subclaustralis. The sulcalis is strong. The anterior part of the plica superior is not connected to the lunella complex. Part of the clausilium plate is visible through the aperture.

Dimensions

(in mm). Holotype Hs: 19.7, Ws: 5.7, Ha: 4.9, Wa: 4.0; paratypes Hs: 15.3-19.9 (mean 17.8, S.D. 1.34), Ws: 4.5-5.7 (mean 5.1, S.D. 0.35), Ha: 3.9-4.9, Wa: 3.5-4.1 (HNHM 99475, n = 12).

Differential diagnosis.

Distinguishable from all other Montenegrina rugilabris subspecies by its costate apical whorls.

Type locality.

Greece, Epirus, Ioannina District, 3 km NE of Prosilio, along the road to Syrrako, 1130 m, 39.5768°N, 21.0969°E.

Type material.

Type locality, leg. ZE, ZF, JG, 23.vi.2013, holotype (HNHM 99474), paratypes (HNHM 99475/21+27a, NHMW 111211/10a+39aj, ER/44, GR/44, SZ/8).

Other material.

Greece, Epirus, 1 km W of Kipina Monastery, 620 m, 39.5668°N, 21.1231°E, leg. ZE, ZF, JG, 23.vi.2013 (HNHM 99476, NHMW 111212); Kipina Monastery, 700 m, 39.5681°N, 21.1313°E, leg. ZE, ZF, JG, 23.vi.2013 (HNHM 99477, NHMW 111213).

Etymology.

The new taxon is named after Jozef Grego, malacologist, and also to his son Maroš Grego, who accompanied the first author on several Balkan field trips, including the one during which when this subspecies was discovered.

Distribution.

Lakmos Mts in northwestern Greece. Known from two nearby localities in the western part of the Lakmos (Fig. 29).

Remarks.

The specimens from the vicinity of the Kipina Monastery have weaker sculpture than those of the type locality.