Sumia macedonica, Glöer & Mrkvicka, 2015

Glöer, Peter & Mrkvicka, Alexander C., 2015, New taxa of freshwater snails from Macedonia (Gastropoda: Hydrobiidae, Amnicolidae), Ecologica Montenegrina 3, pp. 13-18 : 14-16

Sumia macedonica n. gen et n. sp.

( Figs 2-10 )

Type series. Holotype: shell height 2.95 mm, width 1.8 mm, NHMW Mollusca 111202 . Paratypes: 8 specimens in ethanol NHMW Mollusca 111203, 1 shell in collection Glöer .

Locus typicus: Artificial lake at the Spring Šum, 4 km N of Struga, R. Macedonia (41°10'59.27"N 20°37'56.86"E; altitude ca. 700 m)

Etymology: Named after the country where the species lives.

Description

Shell. The light brown shell is ovate-conic with 4-5 whorls and a deep suture. The surface is rough with fine growth lines. The whorls are slightly convex, the aperture is ovate with a simple outer lip, the periostome is sharp, thickened at the columella. The operculum is reddish-brown, umbilicus is closed. Shell height 2.9-3.1 mm, width 1.8 mm.

Animal. The mantle is grayish black, the snout is white, the black eyes are surrounded by white areas. The tentacles are cylindrical, long and rounded at the tip.

Morphology of the penis. The penis is long and slender without any outgrowth, usually bent twice (fig. 6), not pigmented and sharply tapered at the distal end.

Habitat and ecology: The powerful cold spring emerges from a cave, it is fed by carstic waters from Jablanica mountains. Due to the drinkwater catchment supplying the city of Struga, the cave is not accessible. In front of the cave an artificial lake (1-3 m deep, size about 150x50 meters) with concrete walls and stony ground contains clear and cold water from the springs. Growth of aquatic macrophytes ( Ranunculus trichophyllos, Berula erecta, Myriophyllum spicatum) is abundant, Sumia macedonica was observed on and under stones in the lake and in the watercourse from the cave/water catchment to the lake.

Distribution: Only known from type locality.

Figures

Figures 2-6. Sumia macedonica n. sp. 2: Holotype; 3-4: Paratype, 5-6: head with penis in situ.

Figures 7-10. Sumia macedonica n. gen. n. sp.: 7: artificial lake at the locus typicus; 8: stones on the ground of the lake inhabited by Sumia macedonica, 9-10: living animals of Sumia macedonica n. sp.