Bythinella muranyii, Glöer & Erőss, 2015

Glöer, Peter & Erőss, Zoltán Péter, 2015, Two new Bythinella species from Romania (Gastropoda: Amnicolidae), Ecologica Montenegrina 4, pp. 14-18 : 15-16

Bythinella muranyii n. sp.

( Figs 2-5 , Fig. 1 )

Holotype: 2.9 mm height, 1.6 mm width, NHMH 99695 .

Paratypes: 17 sp. NHMH 99696 , 5 sp. coll. P. Glöer, 3 sp. coll. J. Grego.

Type locality: Romania, Caraş- Severin County, Ţarcu Mts , spring and its outlet at Cuntu Meteorological Station; 1465 m alt., N45°18.008' E22° 30.059'; 09.06.2011 T. Kovács, D. Murányi & G. Puskás leg.

Etymology: Named after Dávid Murányi entomologist, who collected this new species.

Description: The yellowish-brown shell has 4.5 whorls which are slightly convex with a deep suture. The shell is elongated cylindric-ovate. The aperture is ovate and lightly angled at the top. The peristome is sharp and not thickened at the columella. The umbilicus is closed. Aperture height to shell height: 0.4, height of body whorl to height of spire 1.5-1.7, shell height 2.3-2.9 mm, width 1.3-1.6 mm.

Animal: The mantle is black with a white boarder, eye spots are visible.

Male copulatory organ: The penial appendix is as long as the penis. The tubular gland is long, thin at the proximal end and thick at the distal end.

Differentiating features: The new species differs from B. dacica by the much more slender penis depicted by Falniowski et al. (2009: p. 25) and the shell height to shell width ratio which is in B. dacica 1.6-1.7 while it is in B. muranyii n. sp. 1.8. In B. gregoi n. sp. the shell is larger and the tubular gland is shorter and thick at the proximal end, while it is in B. muranyii thin at the proximal end. From B. reginae n. sp. it differs in size.

Ecology: The specimens were collected from stones in the spring outlet. The spring has rather cold water, shaded by some close conifers. There are water pipes for water collection but the outlet brook is open; the spring has permanent free outflow (Fig. 14).

Distribution: Only known from type locality.

Remark: Grossu (1946) mentioned in the original description of B. dacica a shell width of 1-1.2 mm while the shells depicted by Falniowski et al. (2009: p. 23) have a width of 1.3-1.4 mm. Thus we do not know if the species Falniowski et al. (2009) worked on are B. dacica in fact.

Figures

Figure 1. Sampling sites of Bythinella spp. in Romania. 1: B. georgievi Glöer 2013, 2: B. blidariensis Glöer 2013, 3: B. sirbui Glöer 2013, 4: B. feheri Glöer 2013, 5: B. falniowskii Glöer 2013, 6: B. grossui Falniowski, Szarowska et Sirbu 2009, 7: B. viseuiana Falniowski, Szarowska et Sirbu 2009; 8: B. calimanica Falniowski, Szarowska et Sirbu 2009, 9: B. viseuiana Falniowski, Szarowska et Sirbu 2009, 10: B. szarowskae Glöer 2013, 11: B. gregoi n. sp. 12: B. radomani Falniowski, Szarowska et Sirbu 2009, 13: B. muranyii n. sp., 14: B. dacica Grossu 1946 (type locality).

Figures 2-5. Bythinella muranyii n. sp. 2: Holotype, 3: penis with tubular gland. 4-5: Paratypes; abbreviations: p: penis, pa: penial appendix, tg: tubular gland (flagellum).