SUMMARY
Information is presented on incidence of the Clouded Apollo Parnassius mnemosyne in the Republic of Mordovia (Russia). Over the period 2006–2016, more than 30 sites of the species were identified. The main increase in the number from 2 to 22 specimens per 1km of route was observed in 2006–2011. Biotopes of the species, fodder plants of the imago, and measures for species protection are described.
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