Islamia papavasileioui, Glöer & Reuselaars, 2020

Glöer, Peter & Reuselaars, Robert, 2020, The Islamia spp. from Greece (Gastropoda: Hydrobiidae) with the description of two new species, Ecologica Montenegrina 32, pp. 42-45 : 43-44

Islamia papavasileioui n. sp. [ fig. 4.1 ]

https://zoobank.org/ urn:lsid:zoobank.org:act:7FC616EF-9A48-480D-86B9-DDA176795DE8

Material examined: Holotype ( RMNH.MOL.347632) and 27 paratypes from type locality.

Holotype: 0.8 mm high, 1.0 mm broad from type locality.

Paratypes: 2 ex. ( RMNH.MOL. 347633) , 3 ex. in coll. Peter Glöer, 22 ex. in coll. Robert Reuselaars (no. 1052) from type locality.

Locus typicus: Spring in Kryoneri , Greece, 38°20'40.73557'' N 21°35'50.22161'' E, 08.06.2016 Robert Reuselaars leg.

Habitat: The tiny specimen were collected with a sieve from waterplants close to the high horizontal crack in the base of the hugh vertical rock wall east of the town.

Additional information about type locality: During a secondary visit in 2019, in an attempt to sample more material of two other species of which the status is uncertain, the type locality was almost impossible to access due to the collapse of steel bridge along the rock wall.

Etymology: Named after Kyriakos Papavasileiou who accompanied Robert Reuselaars on his several trips in Greece.

Description: The tiny shell is valvatoid with 3-3.5 slightly convex whorls with a deep suture. The aperture is circular, the peristome is sharp, the umbilicus is wide, not covered by the body whorl. The spire is small and short. The ratio of shell height to shell width is 0.8. The shell is 0.8 mm high and 1.0 mm broad.

Differentiating characters: The shell of Islamia graeca is more globular with a ratio of shell height to shell width of 1.0, while the spire of Islamia trichoniana is less high than in Islamia papavasileioui n. sp. In Islamia skalaensis n. sp. the umbilicus is partly covered by the body whorl.

Distribution: Greece; only known from type locality.

Figures

Figure 4. 1: Islamia papavasileioui n. sp., spring in Kryoneri, Greece. 2: Islamia skalaensis n. sp. Vasilopotamos river near bridge over the river, west of Skala, Peleponnesos, Greece.