Montenegrina rugilabris (Mousson, 1859)

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 : 74

Taxon classification Animalia Stylommatophora Clausiliidae

Montenegrina rugilabris (Mousson, 1859)

Diagnosis.

Shell medium to large, yellowish- to purplish-brown. Lower whorls mostly smooth, upper ones smooth to indistinctly costate. Neck not or weakly inflexed. Basal crest well recognizable, peripheral crest weak. Peristome rounded to ovoid, with wide, swollen margin. Lamellae superior and spiralis mostly overlap. In front view lamella inferior variably emerged, broadly-bent subcolumellaris usually visible. Lunella dorsal to dorsal-dorsolateral, fused to or separate from the basalis. Lunella complex with the basalis can form a lambda-like structure. Subclaustralis always shorter than the basalis, sulcalis strong. Anterior plica superior fused to or separate from the lunella complex. Clausilium plate well visible through the aperture. Distinguishable from the similar Montenegrina skipetarica by the shorter subclaustralis and well developed sulcalis.