Synura spinosa fm. spinosa Korshikov f. spinosa

192. Synura spinosa Korshikov f. spinosa Ivankovo, Uglich, Rybinsk, Sheksna, Gorky, Kuybyshev, Saratov and Volgograd Reservoirs (Balonov & Kuzmin 1974, Balonov 1976a); Nizhniy Novgorod Region (Balonov & Kuzmin 1974, Balonov 1976 a, Gusev et al. 2017, Kulizin et al. 2021); Lake Onega, Perm Territory, Murmansk and Yaroslavl Regions (Balonov 1976a); Chelyabinsk Region (Balonov 1976 a, Snitko et al. 2021); Republic of Karelia (Balonov 1976a, Balonov 1979); Krasnoyarsk Territory (Balonov & Kuzmina 1986, Bessudova et al. 2018b); Bolshezemelskaya tundra (Balonov 1982, Siver et al. 2005); Lake Ladoga (Balonov 1976a, Voloshko & Gavrilova 2001, Voloshko et al. 2002); Yamal-Nenets Autonomous Area (Voloshko 2007, 2010, Bessudova et al. 2023d); Leningrad Region (Safronova & Voloshko 2013); Saint Petersburg (Safronova 2014); Republic of Buryatia (Bessudova et al. 2018a,c); Orenburg Region (Snitko et al. 2021); Republic of Yakutia (Bessudova et al. 2021).