Montenegrina lillae, 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 : 54-56

Taxon classification Animalia Stylommatophora Clausiliidae

Montenegrina lillae sp. n. Fig. 21L

Diagnosis.

Large, elongate species with wide, broade-lipped aperture, lateral to ventrolateral lunella and long, fused basalis.

Description.

The large, elongate shell of 10½ to 12 whorls is light brown. The surface of the whorls is opaque, very finely wrikled, almost smooth. The weakly inflexed neck has strong whitish ribs that become dense toward the aperture. The basal crest is strong, the peripheral one is weak. The peristome is large, angular, broadly attached. It has wide, whitish, somewhat swollen margin, which is missing at the upper columellar side. The lamella superior is weak, it does not overlap with the spiralis. The terminal part of the lamella inferior is well emerged, descends seeply and ends low at the columellar side of the peristome. The weakly-bent lamella subcolumellaris is retracted, its end is not visible through the aperture. The plica superior often becomes fused to the principalis. The broad, lateral to ventrolateral lunella is connected to the long basalis. The subclaustralis is short, diffuse, the sulcalis is well developed. The anterior part of the plica superior is long, often separate from the lunella complex. The clausilium plate is not visible through the aperture.

Dimensions

(in mm). Holotype Hs: 23.0, Ws: 5.0, Ha: 5.6, Wa: 4.7; paratypes (HNHM 99497, n = 12): Hs: 19.7-23.4 (mean 21.4, S.D. 1.09), Ws: 4.8-5.6 (mean 5.2, S.D. 0.22), Ha: 5.0-5.7, Wa: 4.1-4.8.

Differential diagnosis.

Differs from all other species of the genus by the combination of a broadly attached peristome with dissolved upper margin, weak lamella superior, and deep subcolumellaris. From Montenegrina subcristata , the only other species of the genus with lateral to ventrolateral lunella, it is distinguished by the basalis that is fused to the lunella complex.

Type locality.

Albania, Shkodër District, Koman, ferry harbor near the dam, 180 m, 42.1087°N, 19.8264°E.

Type material.

Type locality, leg. ZE, ZF, AH, DM, 14.iv.2006, holotype (HNHM 99496), paratypes (HNHM 99497/67+9aj, ER/67, HU/67, SZ/10); type locality, leg. ZF, TK, DM, 19.vi.2012, paratypes (HNHM 99498/5, NHMW 111227/6+3a).

Other material.

Albania, Koman Lake, right bank, ca. 12 km upstream of the Koman Dam, 170 m, 42.1872°N, 19.8696°E, leg. ZE, ZF, AH, DM, 15.iv.2006 (HNHM 99499).

Etymology.

This species is named after Lilla Tamás, the wife of the first author.

Distribution.

Lower part of the Drin Valley. Known from the Koman Dam and 12 km upstream of that (Fig. 22).