Abstract
A research study on the population structure of relict and specially protected species Cepaea vindobonensis Fer. (Mollusca, Gastropoda, Pulmonata) in the conditions of the northeastern part of the modern- day distribution range is conducted with the use of allozymes and DNA markers. Groups with both high and low levels of genetic diversity are revealed. A high degree of differentiation in the studied populations (Fst = 0.231, Gst = 0.265, Φst = 0.261–0.263, Nm = 0.630–0.832) is noted, which indicates a disruption of migratory channels and prolonged isolation from each other. Calculation of the effective population size and its comparison to analogous indices for background and vulnerable species of terrestrial mollusks demonstrate a high level of viability of the C. vindobonensis population within the studied area.
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