Montenegrina stankovici ( Urbanski , 1960)

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 : 96

Taxon classification Animalia Stylommatophora Clausiliidae

Montenegrina stankovici ( Urbanski, 1960) Fig. 28I

Delima ( Delima [Heteroptycha] ) stankovici Urbański, 1960: 51-54, plate Ia–c, fig. 1.

Montenegrina stankovici - Nordsieck 1969: 259. (genital anatomy) - Nordsieck 1974: 135, plate 6, fig. 36. - Zilch 1981: 132. - Nordsieck 2009: 73.

Diagnosis.

Shell small to medium, conical, light corneous. Lower whorls smooth, upper ones finely, indistinctly costate. Neck weakly inflexed, finely striate, without recognizable crests. Peristome attached, ovoid, its simple margin is missing at the upper columellar side. Lamellae superior and spiralis do not or only barely overlap. In front view lamella inferior moderately emerged, almost straight descending subcolumellaris mostly not visible. Lunella dorsal to dorsolateral, with weak and diffuse lower part. Plica principalis short, all other plicae absent. Clausilium plate narrow, entirely visible through the aperture.

Dimensions

(in mm). Hs: 13.9-16.6, Ws: 4.0-4.5 ( Nordsieck 1974).

Type locality.

Macedonia, Ohrid District, near Sveti Naum Monastery at the SE shore of the Ohrid Lake.

Type material.

Not known.

Other material.

Type locality, 40.914°N, 20.7406°E, leg. A. Fehér, T. Fehér, ZF, LT, 9.viii.2014 (NHMW 110430/MN/0060); same locality, leg. ZF, Kónya, 10.ix.1994 (HNHM 90879); same locality, leg. ZE, ZF, AH, 6.iv.2004 (HNHM 94328); N of Trpejca, 700 m, 40.9656°N, 20.7858°E, leg. ZE, ZF, AH, 6.iv.2004 (HNHM 94444); same locality, leg. A. Fehér, T. Fehér, ZF, LT, 21.viii.2011 (HNHM 99581); same locality, leg. A. Fehér, T. Fehér, ZF, LT, 9.viii.2014 (NHMW 110430/MN/0059); same locality, leg. ZE, ZF, JG, 29.vi.2015 (NHMW 110430/MN/0063); Trpejca, southern bay, 700 m, 40.9574°N, 20.7778°E, leg. ZF, EH, KJ, HS, 16.x.2014 (NHMW 110430/MN/0062); Ohrid, N foot of the castle hill, 700 m, 41.1147°N, 20.7876°E, leg. A. Fehér, T. Fehér, ZF, LT, 10.viii.2014 (NHMW 110430/MN/0061); ca. 2.5 km S of Peštani, 41.0°N, 20.8°E, leg. LP, PS, AS, 16.vii.1972 (HNHM 36729); Ohrid, Sveti Jovan Kaneo Monastery, leg. LP, PS, AS, 17.vii.1972 (HNHM 36730).

Distribution.

Eastern shore of the Ohrid Lake (Fig. 33).

Remarks.

Inhabits limestone cliffs along the shore of the Ohrid Lake, always very close to the water surface. This is the only known Montenegrina taxon that prefers such type of habitat. Occasionally it occurs together with, or in the vicinity of, Montenegrina dofleini pinteri or Montenegrina perstriata ochridensis , but in a strict sense is not syntopic with these. Apparent spatial segregation can be observed on a fine scale: its congeners prefer cliff regions farther from the water surface. This kind of niche partitioning is unique within the genus.