Occurrence of a Sphaerium species (Bivalvia: Sphaeriidae) of Nearctic origin in European Arctic Russia (Vaigach Island) indicates an ancient exchange between freshwater faunas across the Arctic

The first record of Gyraulus cf. acronicus (Gastropoda, Heterobranchia, Planorbidae) in waterbodies of the Novaya Zemlya Archipelago

“…The data on species diversity, ecology, and reproduction of freshwater molluscs of the Novaya Zemlya Archipelago can be found in a series of publications (Odhner 1923;Sidorov 1925;Bespalaya et al 2015aBespalaya et al , 2015bBespalaya et al , 2017Bespalaya et al , 2019Bespalaya et al , 2021. In total, three species of bivalve molluscs are found in fresh waters of the Archipelago: Pisidium conventus Clessin, 1877, Pisidium waldeni Kuiper, 1975, and Pisidium globularis Westerlund, 1873(Odhner 1923Sidorov 1925;Bespalaya et al, 2017;Bespalaya et al, 2021).…”

Freshwater gastropods of the western part of the Kola Peninsula and northern Karelia (northern Europe)

“…Freshwater molluscs of the Arctic and subarctic parts of Eurasia had been studied for more than a century, and these studies have been especially intensified during the last decades [Frolov, 2010;Bespalaya, 2014;Bespalaya et al, 2015aBespalaya et al, , 2015bBespalaya et al, , 2018Nekhaev, 2015;Ovchankova et al, 2015;Vinarski et al, 2013bVinarski et al, , 2020. On a date, species composition has been described for many regions of the European Far North, including northeastern Europe [Leshko, 1998;Bespalaya et al, 2011Bespalaya et al, , 2017, Scandinavia [Esmark, Hoyer, 1886;Westerlund, 1897;Økland, 1990], and some islands [Smith, 1896;Mandahl-Barth, 1938;Bespalaya et al, 2009Bespalaya et al, , 2015a. While many Arctic regions remain poorly studied mainly due to their poor accessibility, special accounts on molluscan fauna for some relatively not remote and easily available regions are still absent.…”