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).

Published as part of Marinskiy, Vadim V., 2017, Checklist of the freshwater snails (Mollusca: Gastropoda) of Mongolia, pp. 45-78 in Zootaxa 4317 (1) on page 60, DOI: 10.11646/zootaxa.4317.1.2, http://zenodo.org/record/880022