The Freshwater Mollusks (Gastropoda, Pulmonata, Lymnaeidae) in the Meotian Sediments of the Soutern Ukraine

Abstract

Galba s. str.) were recognized in the Lower Meotian (Central Black Sea area) and Upper Meotian (Kerch Peninsula) sediments of the Southern Ukraine. The new subspecies of subgenera Omphiscola-Lymnaea (Omphiscola) ovum kertshensis Kovalenko subsp. nov. is described from the Upper Meotian sediments of Kerch Peninsula. At present it is found that the "current" species of now living Lymnaea predominate in the Lower and Upper Meotian sediments of the Southern Ukraine, while besides the "current" species of Lymnaea the distinguishing species Lymnaea (Omphiscola) maeotica Kovalenko, 1990, is recognized in the Lower Meotian rocks as well as the new subspecies of subgenera Omphiscola-Lymnaea (Omphiscola) ovum kertshensis Kovalenko subsp. nov. is marked. Presence of both the distinguishing species Lymnaea (Omphiscola) maeotica Kovalenko, 1990, in the Lover Meotian rocks and the new subspecies of subgenera Omphiscola-Lymnaea (Omphiscola) ovum kertshensis Kovalenko subsp. nov. in the Upper Meotian ones allows to separate the Lower and Upper Meotian sediments from each other for the continental section of the Meotian Stage of the southern Ukraine.