Orientogalba hookeri (Reeve, 1850)

(fig. 5 J)

Regional distribution. O. hookeri iS Very common in Mongolia being a typical dweller of floodplain marSheS, Shallow ephemeral poolS and Similar non-permanent waterbodieS. It occurS throughout the country, except for itS Southern part.

Extra-limital distribution. Central ASia, including Southern regionS of Siberia and the Amur RiVer baSin (VinarSki & Kantor 2016). The type locality of O. hookeri iS “Sikkim Himalaya” (Hubendick 1951).

Remarks. There are three riVal ideaS on the taxonomic identity of thiS SpecieS. Some authorS (Glöer & Bößneck 2013; Glöer et al. 2014) See it aS a Central ASian mountain SpecieS of Radix occurring, among otherS, in Nepal and KyrgyzStan, whereaS Subba Rao (1989) placed it into the genuS Galba Schrank, 1803 . KrugloV & StarobogatoV (1993b) claSSified it aS a member of the (Sub-)genuS Orientogalba KrugloV et StarobogatoV, 1985, that iS allied to but not identical with Radix . Yen (1942) could not find the type SpecimenS of Lymnaea hookeri in the BritiSh MuSeum, whereaS Hubendick (1951, pl. IV, fig. 18) publiShed a photo of the ‘type’ Shell (? holotype) of thiS SpecieS.

Here, we proViSionally follow KrugloV & StarobogatoV (1993b) conception of thiS SpecieS.

Limnaeus pervius MartenS, 1867, recorded from Mongolia and adjacent regionS of Central ASia (MartenS 1882; Liu Yueyin 1979), iS probably, a junior Synonym of O. hookeri SenSu KrugloV & StarobogatoV (VinarSki 2016a).