Grossuana avandasensis, 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 : 16-17

Grossuana avandasensis n.sp.

( Figs. 6-9 , Fig. 20 )

Type series. Holotype ( RMNH.MOL.339912): Shell height 1.65 mm, shell width 1.2 mm; 12 paratypes (dried) and 10 paratypes (in ethanol, RMNH.MOL.339913) from type locality, 11 ex. in coll. Reuselaars (no. 1140), 2 ex. (dry) in coll. Glöer, 3 ex. (ethanol) coll. Falniowski.

Locus typicus: well near small church west of Avandas , Prefecture of Evros , Greece. Wet place quit hidden under Platanus trees, there was no stream or real waterflow, water dried up after 4-5 m. 08.09.2017 R. E. Reuselaars leg. The specimens were collected from the leaves .

Etymology: Named after Avandas town.

Description: The yellowish brownish shell is ovate-conical with a prominent body whorl. The 4.5-5 whorls are fast increasing, convex with a clear suture. The aperture is ovate, slightly angled at the top. The periostome is thinkened at the columella. The umbilicus is closed. The operculum is red.

The shell height is 1.5-1.7 mm, shell width 1.2 mm.

The mantle is black with a light-grey border. The penis has a small triangular outgrowth at the left side near the basis ( Fig. 2.2 ). The penis-tip is long and tapered.

Differentiating features: The shell of G. slavyanica is slimmer than G. avandaensis n. sp. and G. angeltsekovi is much larger. Only G. avandaensis n. sp. has a triangular outgrowth near the basis of the penis, also different from the Grossuana spp. described here as new.

Figures

Figures 6-9. Grossuana avandasensis n. sp. 6: holotype, 7: penis in situ, 8-9: paratypes.

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

Figures 2-5. Grossuana angeltsekovi. 2: sampling site 3; 3-4: sampling site 4; 5: penis of 1.