Regions of Poland studied by various authors: 1 Beskid Wschodni Mts. 2 Bieszczady Mts. 3 Beskid Niski Mts. 4 Pieniny Mts. 5 Tatra Mts. 6 Orava-Podhale Depression 7 Gorce Mts. 8 Beskid Wyspowy Mts. 9 Wieliczka Foothill 10 Range of Babia Góra 11 Beskid Żywiecki Mts. 12 Beskid Mały Mts. 13 Beskid Śląski Mts. 14 Silesian Foothill 15 Sudety Mts. 16 Kłodzko Basin 17 Wałbrzych Mts. 18 Małopolska Gap of the Vistula 19 Świętokrzyskie Mts. 20 Jędrzejów Plateau 21 Kraków- Częstochowa Upland 22 Oświęcim Basin 23 Łask Upland 24 Legnica Plain 25 Poznań Lakeland 26 Vistula catchment up to Kazimierz Dolny town 27 Bóbr River catchment 28 Central Oder Valley 29 Oder catchment up to the outlet of the Warta River 30 Ełk Lakeland 31 Vistula Fen Country. a area of species occurrence without exact localization given b geographical regions with detailed localization of species provided.