Montenegrina nana barinai, 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 : 58

Taxon classification Animalia Stylommatophora Clausiliidae

Montenegrina nana barinai ssp. n. Fig. 24B

Diagnosis.

Small subspecies with strongly costate shell, widely separate lamellae inferior and spiralis, missing anterior plica superior.

Description.

The small shell of 9½ to 10½ whorls is light brownish-corneous. All whorls are strongly costate. The sharp whitish ribs become crowded behind the aperture. The neck is inflexed, the basal and peripheral crests are well recognizable. The peristome is ovoid, attached, its wide, light brown margin is slightly deflexed. The weak lamella superior ends far from the outer end of the spiralis. The weakly emerged, straight descending end of the lamella inferior is barely visible in front view. The deep-ending, medium-bent lamella subcolumellaris cannot be viewed through the aperture. The broad lunella is dorsolateral. It is fused, via the superior, to the plica principalis, and at its basal end to the short or residual basalis. The subclaustralis is weak, the sulcalis is present. The anterior part of the plica superior is missing. The parietal edge of the clausilium plate is often visible through the aperture.

Dimensions

(in mm). Holotype Hs: 13.2, Ws: 3.6, Ha: 3.5, Wa: 2.9; paratypes (HNHM 99008, n = 12): Hs: 13.0-15.8 (mean 13.8, S.D. 0.95), Ws: 3.4-4.6 (mean 3.9, S.D. 0.34), Ha: 3.1-3.9, Wa: 2.3-3.3.

Differential diagnosis.

Distinguishable from the two other subspecies of Montenegrina nana by its smaller, strongly costate shell, wide separate lamellae superior and spiralis, dorsolateral lunella, and the absence of the anterior plica superior.

Type locality.

Albania, Bulqizë District, Valikardhë, S slope of the Maja e Temlishit, 770 m, 41.514°N, 20.316°E.

Type material.

Type locality, leg. ZF, TN, EM, 15.iv.2014, holotype (HNHM 99508), paratypes (HNHM 99008/39+20a+1aj, NHMW 111231/35a, SZ/4).

Other material.

Type locality, 880 m, 41.5138°N, 20.3142°E, leg. ZB, DP, 29.v.2008, (HNHM 99509).

Etymology.

The new taxon is named after Zoltán Barina, botanist (HNHM), who collected invaluable zoological material during his field trips in Albania.

Distribution.

Known only from its type locality at the southern slope of the Mt. Temlishi in northern Albania. (Fig. 25).

Remarks.

The type locality of the new subspecies is sepatated only by a few hundred meters from that of Montenegrina nana gracilis Erőss & Szekeres, 2006. Montenegrina nana barinai ssp. n. occurs syntopically with Montenegrina perstriata ochridensis .