Montenegrina laxa ( Kuester , 1861)

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 : 46

Taxon classification Animalia Stylommatophora Clausiliidae

Montenegrina laxa ( Kuester, 1861)

Diagnosis.

Shell small to large, yellowish- to brownish-corneous. Lower whorls smooth, upper ones smooth to finely wrinkled-costate. Neck variably inflexed, finely striate to wrinkled-costate. Basal and peripheral crests recognizable. Peristome attached, ovoid to angular, with simple to swollen and reflexed margin. Lamellae superior and spiralis distant to long overlapping. In front view lamella inferior mostly well emerged. Weakly-bent subcolumellaris and the clausilium plate not or only barely visible through the aperture. Lunella short, broad and diffuse, dorsolateral to ventrolateral. Basalis is fused to the lunella as its almost straight continuation. Lunella complex also fused to the plica principalis. Subclaustralis short, sulcalis mostly residual or absent. Anterior plica superior usually long, distant and diverging from the principalis, in most subspecies not connected to the lunella complex.