Orientogalba Kruglov & Starobogatov, 1985

Aksenova, Olga V., Vinarski, Maxim V., Itagaki, Tadashi, Ohari, Yuma, Oshida, Tatsuo, Kim, Sang Ki, Lee, Jin Hee, Kondakov, Alexander V., Khrebtova, Irina S., Soboleva, Alena A., Travina, Oksana V., Sokolova, Svetlana E., Palatov, Dmitry M., Bespalaya, Yulia V., Vikhrev, Ilya V., Gofarov, Mikhail Yu. & Bolotov, Ivan N., 2024, Taxonomy and trans-Beringian biogeography of the pond snails (Gastropoda: Lymnaeidae) of East Asia: an integrative view, Zoological Journal of the Linnean Society 201 (4), pp. 1-24 : 16

Genus Orientogalba Kruglov & Starobogatov, 1985

Kruglov & Starobogatov, 1985b: 28.

Type species: Lymnaea heptapotamica Lazareva, 1967 (by original designation).

Diagnosis: Shell typically small (≤ 12 mm in height, rarely larger), ovoid, ovate-conical or high-conical. Whorls are visibly inflated, with aperture relatively enlarged. Prostate with a single internal fold. Praeputium sac-like; it is much wider and slightly longer than the penis sheath. The penial knot is absent.

Species richness: The genus includes several nominal species, only some of which have been studied genetically ( Vinarski et al. 2020). The East Asian Region is inhabited by the widespread Orientogalba ollula ( Gould, 1859) (for the account for this species, see Vinarski et al. 2020) ( Figs 4H, 5H) and the Japanese endemic O. hokkaidoensis ( Figs 6G–I, 7C)

Distribution: East, Southeast, and Central Asia; Pacific Region. Introduced to some areas remote from the native range.