Gyraulus dybowskii

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 : 99-100

Gyraulus dybowskii (Kolesnikov, 1947)

*1947 Planorbis eichwaldi var. dybowskii Kolesnikov: 109, 112, fig. in tab. 1.

1966b Anisus (Andrusowia) [sic] kolesnikovi Logvinenko and Starobogatov: 1473, fig. 5.

1966b Anisus (Andrusowia) [sic] kolesnikovi sublittoralis Logvinenko and Starobogatov: 1472-1473, fig. 6.

2016 Gyraulus (Gyraulus) kolesnikovi (Logvinenko & Starobogatov, 1966). - Vinarski and Kantor, 2016: 379.

Status. Pontocaspian species, identity uncertain.

Type locality. Caspian Sea, 40°37'N, 50°52'E, 115 m.

Distribution. Middle and southern Caspian Sea ( Logvinenko and Starobogatov 1969). This species was mentioned from depths between 200 and 300 m in the South Caspian Basin of Azerbaijan ( Mirzoev and Alekperov 2017, who reported the species as Anisus colesnikovi [sic]).

Taxonomic notes. Logvinenko and Starobogatov (1966b) considered this species and Andrusovia dybowskii Brusina in Westerlund, 1902b to belong in the same genus, Anisus (Andrusovia) , rendering P. dybowskii Kolesnikov, 1947 a junior homonym. Therefore, they introduced A. kolesnikovi as replacement name. Since both taxa do clearly not belong to the same genus or even the same family, the replacement name is to be discarded.

The species resembles G. eichwaldi regarding the general habitus; it differs in the more pronounced angle at the transition between whorl flank and apical plane. A revision is required to investigate if the Caspian Gyraulus species are distinct species or morphotypes of G. eichwaldi . The generic placement follows Vinarski and Kantor (2016). Note that those authors listed the earlier described P. eichwaldi dybowskii Kolesnikov, 1947 as a synonym of G. kolesnikovi .

Conservation status. Least Concern (for Anisus kolesnikovi ; Vinarski 2011a).