Bythiospeum petroedei, Glöer & Grego, 2015

Glöer, Peter & Grego, Jozef, 2015, New subterranean freshwater Molluscs from Bosnia & Hercegovina (Mollusca: Hydrobiidae), Ecologica Montenegrina 2 (4), pp. 307-314 : 312

Bythiospeum petroedei n. sp.

( Figs 28-32)

Holotype: shell height 2.1 mm, width 1.0 mm, HNHM 99429 .

Paratypes: 6 specimen + some broken shells from Izvor Plive 1A,> 50 specimens, HNHM 99430 , 6 specimen in coll. Glöer, 10 specimens in coll Grego from Izvor Plive 1B .

Locus typicus: Bosnia & Hercegovina , Izvor Plive 1B, ca. 200 m E of izvor Plive 1, side spring 2 just under left side of path to Izvor Plive 1; sandy sediment directly at bottom of spring outlet; N44.240893°, E17.018252°; 05.04.2015 Jozef & Maroš Grego leg. ( Fig. 4, 5)

Etymology: Species is names after Ede Petró, untimely deceased avid malacologist from Budapest, Hungary, who contributed the study of spring fauna of Northern Hungary.

Description

Shell. The whitish and silky shell is elongate-conic with 5.5 whorls, apex blunt. The umbilicus is closed, aperture oval, slightly sinuated outer lip from lateral view. Shell height 2.0– 2.3 mm, width 1.0– 1.1 mm.

Differentiating features: Bythiospeum petroedei n. sp. differs from B. blihensis n. sp. and B. plivensis n. sp. in size. From B. hrustovoensis n. sp. it differs by the sinuated outer lip, which is in B. hrustovoensis n. sp. only weak developed. From B. maroskoi n. sp. it differs in the embryonic shell, which ratio of the first half whorl to first whorl is in B. maroskoi n. sp. 0.5 and in B. petroedei n. sp. 0.75.

Distribution: Only known from type locality.

Associated species: Belgrandiella fontinalis (F.J. Schmidt, 1847) , Ancylus recurvus von Martens, 1873 , Bythinella sp. (juv.), Hauffenia sp.