Grossuana stenaensis, Glöer & Reuselaars & Papavasileiou, 2018

Glöer, Peter, Reuselaars, Robert & Papavasileiou, Kyriakos, 2018, Grossuana Radoman, 1973 from Macedonia (Greece) (Gastropoda: Truncatelloidea) with the description of three new species, Ecologica Montenegrina 17, pp. 14-19 : 17-18

Grossuana stenaensis n.sp.

( Figs. 10-13 , Fig. 21 )

Type series. Holotype ( RMNH.MOL.339914): Shell height 1.9 mm, shell width 1.3 mm; 7 adult Paratypes and some juveniles in ethanol from type locality ( RMNH.MOL.339915), 6 ex. in coll. Reuselaars (no. 1140) , 2 ex. (dry) in coll. Glöer, 3 ex. (ethanol) coll. Falniowski.

Locus typicus: Feeding side-spring of the river Nestos , close to Stena of Nestos , Prefecture of Xanthi, Greece. Strong running spring. 10.09.2017 R. E. Reuselaars leg. The specimen were collected from small and medium sized stones on the bottom of the spring .

Etymology: Named after the nearby recreation area Stena of Nestos.

Description: The horn-coloured shell is ovate with a prominent body whorl. The 4.5-5 whorls are slightly convex with a weak suture. The aperture is ovate slightly angled at the top with a sharp periostome. The umbilicus is closed.

Shell height 1.7-1.9 mm, width 1.2-1.3 mm.

The mantle is black with a light-grey border. The penis is slim with a tapered penis-tip. At the basis of this tip is a dark spot visible.

Differentiating features: The shell of Grossuana stenaensis n. sp. is broader than G. slavyanica and the penis-tip is shorter than in G. angeltsekovi and different from the Grossuana spp. described here as new.

Figures

Figure 10-13. Grossuana stenaensis n. sp. 10: holotype, 11: penis, 12-13: paratypes.

Figures 18-21: The sampling sites. 18: Saint Johns, 19: Sidironero, 20: Avandas, 21: Nestos.