Eupaludestrina stagnorum

Wesselingh, Frank, Poorten, Jan Johan ter, Kijashko, Pavel, Albrecht, Christian, Anistratenko, Olga Yu, Frolov, Pavel, Gándara, Alberto Martinez, Gittenberger, Arjan, Gogaladze, Aleksandre, Mikhail Karpinsky, Popa, Luis, Sands, Arthur F, Vandendorpe, Justine & Wilke, Thomas, 2019, Mollusc species from the Pontocaspian region - an expert opinion list, ZooKeys 827, pp. 31-124 : 64

Eupaludestrina stagnorum (Gmelin, 1791)

*1791 Helix stagnorum Gmelin: 3653.

1975 Falsihydrobia streletzkiensis Chukhchin: 121.

2012 Heleobia stagnorum (Gmelin, 1791). - Welter-Schultes: 39, unnumbered text figures.

2012 Semisalsa stagnorum (Gemlin, 1791). - Kroll et al.: 1520.

Status. Accepted, native Pontocaspian or immigrant species.

Type locality. Kaasjeswater, Zierikzee, the Netherlands.

Distribution. Coastal areas of Europe and the Mediterranean region, extending to North Africa and east to Iran ( Glöer 2002). Occurrence in Black Sea according to, e.g., Chukhchin (1975) and in the Caspian Sea (TW, unpublished data).

Taxonomic notes. We find the attribution of this species to the genus Eupaludestrina unsatisfactory, yet a further revision is required to establish and stabilise the generic attribution as there is considerable confusion. It is commonly classified in the South American genus Heleobia (e.g., Prié 2011), whereas Kroll et al. (2012) suggested that this species belongs to the genus Semisalsa , a group of European Cochliopidae distinct from Heleobia . However, Semisalsa is currently listed as junior synonym of Eupaludestrina Mabille, 1877 (type species: Hydrobia macei Paladilhe, 1867, by subsequent designation by Kadolsky 2008). Following Kadolsky (2008), Eupaludestrina is currently ranked as subgenus of Heleobia in MolluscaBase (2018), but both the phylogenetic and geographic distinction of the European and American species suggest separation on the genus level.

Remarks. It is unclear whether the species is native to the Pontocaspian area or a recent immigrant.

Conservation status. Least Concern ( Prié 2011).