|  | site | site # (info) | collection date | kind | depth | substrate | salin | comments | reference | 
| A | Laugarvatn, south Iceland | 599 
  map | Jul 1-Aug 2, 1937 |  |  |  | freshwater | bog pool north of Laugarvatn, 1 specimen. | Steinböck O (1948): 23 | 
| B | Neudorf, Switzerland | 1949 
  map | prior to 1894 |  |  |  | freshwater |  | Fuhrmann O (1894): 218-222, 256 | 
| C | Michelfelden near Basel, Switzerland | 1953 
  map | prior to 1894 |  |  |  | freshwater |  | Fuhrmann O (1894): 218-222, 256 | 
| D | Kleinhüningen near Basel, Switzerland | 1959 
  map | prior to 1894 |  |  |  | freshwater |  | Fuhrmann O (1894): 218-222, 256 | 
| E | Shropshire (Salop), United Kingdom | 2151 
  map | prior to 1867 |  |  |  | freshwater | weedy, reedy pond on Wild Moors, Salop, near Preston, England | Houghton W (1867): ; from Young JO 1970 (citation)- p. 221 | 
| F | Tottenham, London, England, United Kingdom | 2180 
  map | prior to 1913 |  |  |  | freshwater | on waterlilies and surface film at Staines and at East London Waterworks, Tottenham, London. | Whitehead H (1913): ; from Young JO 1970 (citation)- p. 221 | 
| G | Cambridgeshire, United Kingdom | 2168 
  map | 1926 |  |  |  | freshwater | Brick Pit Pond and Spinney Drove Ditch, Wicken Fen, Cambridgeshire, England.  Whole mounts deposited in British Museum by Perkins confirmed by Young JO. | Perkins M (1928): ; from Young JO 1970 (citation)- p. 221 | 
| H | Raheny, Ireland | 2181 
  map | prior to 1936 |  |  |  | freshwater | Raheny ponds. | Southern R (1936): ; from Young JO 1970 (citation)- p. 221 | 
| I | Portumna, Ireland | 2120 
  map | prior to 1936 |  |  |  | freshwater | River Shannon at Hayes Channel, Portumna County, Tipperary. | Southern R (1936): ; from Young JO 1970 (citation)- p. 221 | 
| J | Merseyside, United Kingdom | 2182 
  map | 1965-1967 |  |  |  | freshwater | ditch, on Massam's Slack Nature Reserve at Freshfield, Lancs., Grid Ref. 34283103. | Young JO (1970): 221 | 
| K | Crose Mere, Shropshire, United Kingdom | 2183 
  map | 1965-1967 |  |  |  | freshwater | Grid Ref. 33430305. | Young JO (1970): 221 | 
| L | Shropshire (Salop), United Kingdom | 2151 
  map | 1965-1967 |  |  |  | freshwater | White Mere, Shropshire, Grid Ref. 33415330. | Young JO (1970): 221 | 
| M | Mangalia Lake (village Limanu), Romania | 2570 
  map | Oct 17, 1968 |  |  |  | freshwater | Numerous specimens, among green and filamentous algae of a freshwater source. | Mack-Fira V (1974): 262 | 
| N | Danube Delta, Romania | 2576 
  map | 1970 or earlier |  |  |  | freshwater | Common in the stagnant freshwater basins and in the Danube swamps. | Mack-Fira V (1970): ; from Mack-Fira 1974 (citation)- p. 262 | 
| O | Sweden (Schweden) | 2625 
  map | 1913 or earlier |  |  |  | freshwater |  | Graff Lvon (1913): 288 | 
| P | France (Frankreich) | 2454 
  map | 1913 or earlier |  |  |  | freshwater |  | Graff Lvon (1913): 288 | 
| Q | Netherlands (Holland) | 2639 
  map | 1913 or earlier |  |  |  | freshwater |  | Graff Lvon (1913): 288 | 
| R | Austria (Österreich) | 2456 
  map | 1913 or earlier |  |  |  | freshwater |  | Graff Lvon (1913): 288 | 
| S | Charkov (Kharkiv, Charkow, Khar'kov, Kharkow), Ukraine | 2444 
  map | 1913 or earlier |  |  |  | freshwater |  | Graff Lvon (1913): 288 | 
| T | Siberia (Siberie, Sibirien, Sibir'), Russia | 2627 
  map | 1913 or earlier |  |  |  | freshwater |  | Graff Lvon (1913): 288 | 
| U | Greenland (Grönland) | 2726 
  map | 1913 or earlier |  |  |  | freshwater |  | Graff Lvon (1913): 288 | 
| V | Saint Petersburg (Sankt-Peterburg, Petrogrado, Petrograd, Leningrad), Russia | 1708 
  map | 1926 or earlier |  |  |  | freshwater |  | Nasonov NV (1926): [location from Louise Bush notes on literature for this species, see card] | 
| W | Japan (Nippon, Yaponiya, Nihon, Japon, Giappone) | 2738 
  map | 1930 or earlier |  |  |  | freshwater |  | Okugawa KI (1930): [location from Louise Bush notes on literature for this species, see card] | 
| X | East Prussia (Ostpreussen, Prusy Wschodnie, Prusse Orientale), Poland | 2475 
  map | 1909 or earlier |  |  |  | freshwater |  | Graff Lvon (1909): [location from Louise Bush notes on literature for this species, see card] | 
| Y | Saint Petersburg (Sankt-Peterburg, Petrogrado, Petrograd, Leningrad), Russia | 1708 
  map | 1926 or earlier |  |  |  | freshwater |  | Nasonov NV (1926): [location from Louise Bush notes on literature for this species, see card] | 
| Z | Sweden (Schweden) | 2625 
  map | 1913 or earlier |  |  |  | freshwater |  | Graff Lvon (1913): 290 | 
| A1 | Denmark (Dänemark) | 2469 
  map | 1913 or earlier |  |  |  | freshwater |  | Graff Lvon (1913): 290 | 
| B1 | Germany (Deutschland) | 2628 
  map | 1913 or earlier |  |  |  | freshwater | north Germany. | Graff Lvon (1913): 290 | 
| C1 | Graz (Gratz), Austria | 1963 
  map | 1913 or earlier |  |  |  | freshwater |  | Graff Lvon (1913): 290 | 
| D1 | White Sea (Beloye More, Weisses Meer), Isle of Solowetzk (Solowetsk, Solowjetsk, Solovetskiy, Ostrov, Solovetski Island; Solowezki, Solowetzki, Solovets, Solovjetsk), Russia | 293 
  map | 1913 or earlier |  |  |  | freshwater |  | Graff Lvon (1913): 290 | 
| E1 | Bologoye (Bologoje), Russia | 2463 
  map | 1913 or earlier |  |  |  | freshwater |  | Graff Lvon (1913): 290 | 
| F1 | Dorpat (Tartu, Terbata, Tartto, Derpt, Yurev, Yur'yev),  Estonia | 2451 
  map | 1913 or earlier |  |  |  | freshwater |  | Graff Lvon (1913): 290 | 
| G1 | Finland (Finnland, Finlyandiya, Finlandia, Finlande, Suomen Tasavalta, Suomi) | 2656 
  map | 1913 or earlier |  |  |  | freshwater |  | Graff Lvon (1913): 290 | 
| H1 | Kapisillit (Kapisigdlit, Kapisilik), Greenland | 280 
  map | 1932 or earlier |  |  |  | freshwater | brook moss. | Steinböck O (1932): 320 | 
| I1 | Egedesminde (Aasiaat), Disko Bay, Greenland | 276 
  map | 1932 or earlier |  |  |  | freshwater | pools. | Steinböck O (1932): 320 | 
| J1 | Jakobshavn, Disko Bay, Greenland | 281 
  map | 1879 or earlier |  |  |  | freshwater | pools. | Levinsen GMR (1879): ; from Steinbock (citation)- p. 320 | 
| K1 | Dolgaya (Dolgaja) Zapadnaya Guba (Bolgaya Guba), White Sea (Beloye More, Weisses Meer), Russia | 1225 
  map | 1932 or earlier |  |  |  | freshwater | lake. | Steinböck O (1932): 320 | 
| L1 | White Sea (Beloye More, Weisses Meer), Isle of Solowetzk (Solowetsk, Solowjetsk, Solovetskiy, Ostrov, Solovetski Island; Solowezki, Solowetzki, Solovets, Solovjetsk), Russia | 293 
  map | 1932 or earlier |  |  |  | freshwater | lake. | Steinböck O (1932): 320 | 
| M1 | Heegermeer Lake, Netherlands (Holland) | 1319 
  map | Jun 7-12, 1971 |  | littoral | vegetation | freshwater | North shore, adjacent irrigation/drainage ditches.  Bricks, rough stones.   Vegetation, Phragmites, little detritus.  11-30 individuals per hour. | Young JO (1972): 61 | 
| N1 | Brandemeer Lake,  Netherlands (Holland) | 3324 
  map | Jun 7-12, 1971 |  | littoral | vegetation | freshwater | West shore.  Vegetation, Phragmites, little detritus.  1-10 individuals per hour. | Young JO (1972): 61 | 
| O1 | Wijde Ee Lake, De Veenhoop, Netherlands (Holland) | 3328 
  map | Jun 7-12, 1971 |  | littoral | vegetation | freshwater | North shore. Vegetation, Typha, little Scirpus, thick detritus.  1-10 individuals per hour. | Young JO (1972): 61 | 
| P1 | Crose Mere, Shropshire, United Kingdom | 2183 
  map | May 1966 - Feb 1967 |  | littoral |  | freshwater | calcium rich lake (59.6 mg/l). | Young JO (1973): 204 | 
| Q1 | Blake Mere, Ellesmere, Shropshire, United Kingdom | 3334 
  map | May 1966 - Feb 1967 |  | littoral |  | freshwater | calcium rich lake (33.6 mg/l). | Young JO (1973): 204 | 
| R1 | People’s Democratic Republic of Algeria (Al-Jaza’ir, L’Etat Algerien, Algérie), Africa | 3524 
  map | 1928 or earlier |  |  |  | freshwater |  | Gauthier H (1928): ; from Young 1976 (citation)- 422 | 
| S1 | Kenya | 3517 
  map | 1928 or earlier |  |  |  | freshwater |  | Young JO, Young BM (1976): ; from Young 1976 (citation)- 422 | 
| T1 | Soneja, Spain | 5117 
  map | 1931 or earlier |  |  |  |  | Ruisseau qui se jette dans le petit lac de Balsa de la Dehesa a Soneja. | Gieysztor M (1931): 146 | 
| U1 | Lej Falcum, near Saint Moritz (Sankt Moritz-Dorf, Sankt Murezzan), Switzerland | 4154 
  map | 1911 or earlier |  |  |  | freshwater | Lej Falcum in der Nähe von St. Moritz (Ober-Engadin, 1810 m ü. M.). | Hofsten N v (1911): from Hofsten 1912 (citation)- p. 650 | 
| V1 | Thuner Lake (Thunersee, Thuner See, Lake of Thoune, Lago di Thun), Switzerland | 2697 
  map | 1907 or earlier |  |  |  | freshwater | Thuner See, Ufer.  Teiche am Einfluss der Kander in diesen See und bei Kienholz am Brienzer See.  Geistsee, Uebeschisee. | Hofsten N v (1907): from Hofsten 1912 (citation)- p. 650 | 
| W1 | Brienzersee (Brienzer See, Lake of Brienz), Switzerland | 2725 
  map | 1907 or earlier |  |  |  | freshwater | Thuner See, Ufer.  Teiche am Einfluss der Kander in diesen See und bei Kienholz am Brienzer See.  Geistsee, Uebeschisee. | Hofsten N v (1907): from Hofsten 1912 (citation)- p. 650 | 
| X1 | Geistsee, Längenbühl, Canton of Berne, Switzerland | 4104 
  map | 1907 or earlier |  |  |  | freshwater | Thuner See, Ufer.  Teiche am Einfluss der Kander in diesen See und bei Kienholz am Brienzer See.  Geistsee, Uebeschisee. | Hofsten N v (1907): from Hofsten 1912 (citation)- p. 650 | 
| Y1 | Uebeschisee, Uebeschi, near Thun, Switzerland | 4132 
  map | 1907 or earlier |  |  |  | freshwater | Thuner See, Ufer.  Teiche am Einfluss der Kander in diesen See und bei Kienholz am Brienzer See.  Geistsee, Uebeschisee. | Hofsten N v (1907): from Hofsten 1912 (citation)- p. 650 | 
| Z1 | Lac de Neuchatel (Neuenburger See, Neuenburg, Neuenburgersee, Neuchâtel), Switzerland | 2751 
  map | 1897 or earlier |  |  |  | freshwater | Sümpfe am Ufer des Lac de Neuchatel bei Yverdon. | Du Plessis G (1897): from Hofsten 1912 (citation)- p. 650 | 
| A2 | Lac de Joux, Vallée de Joux, Canton of Vaud, Switzerland | 4148 
  map | 1897 or earlier |  |  |  | freshwater | Ufer des Lac de Joux. | Du Plessis G (1897): from Hofsten 1912 (citation)- p. 650 | 
| B2 | Thika Road, Kenya | 3514 
  map | Jul 26, 1972 |  |  |  | freshwater | Pond in clay-brick works, 6 km from Nairobi, along Nairobi to Thika road; 25 x 15 m with mud and much vegetation, including Typha.  2 specimens. | Young JO, Young BM (1976): 96 | 
| C2 | Karen, Nairobi Area, Kenya | 3096 
  map | May 29, 1972 |  |  |  | freshwater | Pond near Karen, about 0.5 km from main road; mud with much aquatic vegetation including Typha and Papyrus.  1 specimen. | Young JO, Young BM (1976): 96 | 
| D2 | Karen, Nairobi Area, Kenya | 3096 
  map | Aug 1, 1972 |  |  |  | freshwater | Pond near Karen, about 0.5 km from main road; mud with much aquatic vegetation including Typha and Papyrus.  8 specimen. | Young JO, Young BM (1976): 96 | 
| E2 | Karen, Nairobi Area, Kenya | 3096 
  map | Nov 3, 1971 |  |  |  | freshwater | Pond near Karen, near Nairobi; half-way between Ngong road and Nairobi National Park link road; approximately 50 x 30 m; mud with much vegetation, including Typha and water-lilies.  1 specimen. | Young JO, Young BM (1976): 96 | 
| F2 | Idaho, USA | 5973 
  map | 1954 or earlier |  |  |  |  |  | Knapp SE (1954): from Luther 1963 (citation)- p. 125 | 
| G2 | middle Japan | 3867 
  map | 1930 and earlier |  |  |  |  |  | Okugawa KI (1930): from Luther 1963 (citation)- p. 125 | 
| H2 | Japan (Nippon, Yaponiya, Nihon, Japon, Giappone) | 2738 
  map | 1929 or earlier |  |  |  |  |  | Nasonov NV (1929): from Luther 1963 (citation)- p. 125 | 
| I2 | Tien Shan(Tien-Shan, Tien Range, Tien Shan Mountains, T'ien-shan Shan-mo, T'ien-Shan Range, Thian Schan, Tyan' Shan', Thian Shan, Tienschan), Kyrgyzstan | 2737 
  map | 1908 or earlier |  |  |  |  |  | Bendl WE (1908): from Luther 1963 (citation)- p. 125 | 
| J2 | Bandar-e Anzali (Enseli, Pechlevi, Enzeli, Enceli, Pahlevi) harbour, Caspian Sea, Iran | 4745 
  map | 1926 or earlier |  |  |  |  |  | Tarnogradsky DA (1926): from Luther 1963 (citation)- p. 125 | 
| K2 | Tobol’sk (Tobolsk), Russia | 5974 
  map | 1905 or earlier |  |  |  |  |  | Nasonov NV (1917): Plotnikov 1904 fide Nasonov 1917:  from Luther 1963 (citation)- p. 125 | 
| L2 | Tomsk, Siberia, Russia | 2631 
  map | 1905 or earlier |  |  |  |  |  | Plotnikow W (1905): from Luther 1963 (citation)- p. 125 | 
| M2 | Kazan' (Kasan), Russia | 2453 
  map | 1894 or earlier |  |  |  |  |  | Sabussow H (1894): laut Nasonov 1924;from Luther 1963 (citation)- p. 125 | 
| N2 | Saratov (Saretow, Saratow), Russia | 2638 
  map | 1902 or earlier |  |  |  |  |  | Zykoff W (1902): from Luther 1963 (citation)- p. 125 | 
| O2 | Saratov (Saretow, Saratow), Russia | 2638 
  map | 1921 or earlier |  |  |  |  |  | Nasonov NV (1921): from Luther 1963 (citation)- p. 125 | 
| P2 | Orenburg (Оренбург, Chkalov, Tschkalow), Russia | 5794 
  map | 1921 or earlier |  |  |  |  |  | Beklemischev VN (1922): from Luther 1963 (citation)- p. 125 | 
| Q2 | Kaluga (Kalouga, Kalyga, Kanyra), Russia | 5561 
  map | 1917 or earlier |  |  |  |  |  | Beklemischev VN (1917): from Luther 1963 (citation)- p. 125 | 
| R2 | Murom (Murom am Oka, Муром) , Russia | 5793 
  map | 1940 or earlier |  |  |  |  | Oka bei Murom | Corde WJ (1940): from Luther 1963 (citation)- p. 125 | 
| S2 | Moskva (Moskau, Moskwa, Moscow, Moscou), Russia | 2694 
  map | 1877 or earlier |  |  |  |  |  | Nasonov NV (1877): from Luther 1963 (citation)- p. 125 | 
| T2 | Ivanovo (Ivanovo-Vosnesensk, Ivanovo-Voznesensk, Ivanovo-Vosnessensk Иваново, Iwanowo), Russia | 5751 
  map | 1923 or earlier |  |  |  |  |  | Cordé WJ (1923): from Luther 1963 (citation)- p. 125 | 
| U2 | Bologoye (Bologoje), Russia | 2463 
  map | 1906 or earlier |  |  |  |  |  | Plotnikow W (1906): from Luther 1963 (citation)- p. 125 | 
| V2 | Kirov (Wjatka, Киров, Khlynov , Kirow, Viatka, Vyatka, Vjatka), Russia | 5792 
  map | 1921 or earlier |  |  |  |  |  | Nasonov NV (1921): from Luther 1963 (citation)- p. 125 | 
| W2 | Perm (Molotov, Perm'), Russia | 2993 
  map | 1921 or earlier |  |  |  |  |  | Beklemischev VN (1921): from Luther 1963 (citation)- p. 125 | 
| X2 | Saint Petersburg (Sankt-Peterburg, Petrogrado, Petrograd, Leningrad), Russia | 1708 
  map | 1924 or earlier |  |  |  |  |  | Nasonov NV (1924): and Nasonov 1926 (citation); from Luther 1963 (citation)- p. 125 | 
| Y2 | Bulgaria (Bulgarien) | 3874 
  map | 1934 or earlier |  |  |  |  |  | Valkanov A (1926): and Valkanov 1934 (citation); from Luther 1963 (citation)- p. 125 | 
| Z2 | Czechoslovakia (Tschechoslovakei) | 3872 
  map | 1880 or earlier |  |  |  |  |  | Vejdovsky F (1880): from Luther 1963 (citation)- p. 125 | 
| A3 | western and middle, Czech Republic (Böhmen, Bohmen, Bohemia) | 2640 
  map | 1880 or earlier |  |  |  |  |  | Vejdovsky F (1880): from Luther 1963 (citation)- p. 125 | 
| B3 | Kurisches Haff (Куршский залив, Kuršių marios) between Lithuania and Oblast, Russia | 5586 
  map | 1943 or earlier |  |  |  |  | (Meixner, unveröffentlicht) | Luther A (1963): 125 | 
| C3 | Dorpat (Tartu, Terbata, Tartto, Derpt, Yurev, Yur'yev),  Estonia | 2451 
  map | 1885 or earlier |  |  |  |  |  | Braun M (1885): 125 | 
| D3 | Lunz am See (Lunz), Austria | 2997 
  map | 1915 or earlier |  |  |  |  |  | Meixner J (1915): 125 | 
| E3 | Graz (Gratz), Austria | 1963 
  map | 1882 or earlier |  |  |  |  |  | Graff Lvon (1882): from Luther 1963 (citation)- p. 125 (Schmidt, nach Graff 1882) | 
| F3 | Bundesland Wien (Vienna), Austria | 5931 
  map | 1938 or earlier |  |  |  |  |  | Vornatscher L (1938): from Luther 1963 (citation)- p. 125 | 
| G3 | northern Austria (Nord-Österreich) | 5975 
  map | 1925 or earlier |  |  |  |  |  | Spandl H (1925): from Luther 1963 (citation)- p. 125 | 
| H3 | Switzerland (Schweiz) | 2455 
  map | 1912 or earlier |  |  |  |  |  | Hofsten N v (1912): from Luther 1963 (citation)- p. 125 | 
| I3 | Spain (Espagne, Espanha, Espana, Hispania, Spagna, Spanien) | 2735 
  map | 1931 or earlier |  |  |  |  |  | Gieysztor M (1931): from Luther 1963 (citation)- p. 125 | 
| J3 | north of France (Nordfrankreich) | 3999 
  map | 1890 or earlier |  |  |  |  |  | Hallez P (1890): from Luther 1963 (citation)- p. 125 | 
| K3 | Nürnberg (Nuremberg, Nurenburg), Germany | 5962 
  map | 1882 or earlier |  |  |  |  | Weissenfels an d. Saale; Nürnberg. | Graff Lvon (1882): from Luther 1963 (citation)- p. 125 | 
| L3 | Weißenfels an der Saale, Germany | 5976 
  map | 1882 or earlier |  |  |  |  | Weissenfels an d. Saale; Nürnberg. | Graff Lvon (1882): from Luther 1963 (citation)- p. 125 | 
| M3 | Altrip, Rheinland-Pfalz, Germany | 5952 
  map | 1963 or earlier |  |  |  |  | Altrip, Tümpel. | Luther A (1963): 125 | 
| N3 | Pfal (Bayrischer Pfahl, Bayrische Pfalz), Germany | 5789 
  map | 1963 or earlier |  |  |  |  |  | Luther A (1963): 125 | 
| O3 | Oppenheim, Germany | 5788 
  map | 1963 or earlier |  |  |  |  | Oppenheim, Teiche in Verbindung mit dem Rhein | Luther A (1963): 125 | 
| P3 | Altrhein near Neuhof, Germany | 5819 
  map | 1963 or earlier |  |  |  |  | Altrhein bei Neuhof unweit Ludwigshafen | Luther A (1963): 125 | 
| Q3 | Ludwigshafen am Rhein-Oppau, Germany | 5964 
  map | 1963 or earlier |  |  |  |  | Altrhein bei Neuhof unweit Ludwigshafen | Luther A (1963): 125 | 
| R3 | Axien, Germany | 5801 
  map | 1848 or earlier |  |  |  |  |  | Schmidt O (1848): from Luther 1963 (citation)- p. 125 (Schmidt1848 nach Graff 1882 (citation) | 
| S3 | Kurmark, Germany | 3468 
  map | 1942 or earlier |  |  |  |  |  | Weise M (1942): from Luther 1963 (citation)- p. 125 | 
| T3 | Schleswig-Holstein, Germany | 5786 
  map | 1961 or earlier |  |  |  |  |  | Rixen J-U (1961): from Luther 1963 (citation)- p. 125 | 
| U3 | Schleswig-Holstein, Germany | 5786 
  map | 1948 and earlier |  |  |  |  |  | Brinkmann A (1905): and Berg 1938 (citation), Berg 1948 (citation); from Luther 1963 (citation)- p. 125 | 
| V3 | Tåkern, Sweden | 5761 
  map | 1920 or earlier |  |  |  |  |  | Hofsten N v (1920): from Luther 1963 (citation)- p. 125 | 
| W3 | London, England, United Kingdom | 2115 
  map | 1913 or earlier |  |  |  |  | E. London | Whitehead H (1913): from Luther 1963 (citation)- p. 125 | 
| X3 | Preston, United Kingdom | 3900 
  map | 1896 or earlier |  |  |  |  |  | Gamble FW (1896): from Luther 1963 (citation)- p. 125 | 
| Y3 | Iceland (Island) | 596 
  map | 1948 or earlier |  |  |  |  |  | Steinböck O (1948): from Luther 1963 (citation)- p. 125 | 
| Z3 | West Greenland (Westgrönland), Greenland | 3474 
  map | 1932 and earlier |  |  |  |  |  | Levinsen GMR (1879): Reisinger and Steinböck 1927 (citation), Steinböck 1932 (citation); from Luther 1963 (citation)- p. 125 | 
| A4 | Gvardeyskoye (Гвардейское, Karisalmi), Russia | 5685 
  map | 1917 and earlier |  |  |  |  |  | Nasonov NV (1917): from Luther 1963 (citation)- p. 125 | 
| B4 | Vendelä (Ventelä), Finland | 5885 
  map | 1917 and earlier |  |  |  |  | Seen Ventelä. | Nasonov NV (1917): from Luther 1963 (citation)- p. 125 | 
| C4 | Tervajärvi, Finland | 5932 
  map | 1917 and earlier |  |  |  |  |  | Nasonov NV (1917): from Luther 1963 (citation)- p. 125 | 
| D4 | Kittilä (Kittila), Finland | 2979 
  map | Jun 26, 1950 |  |  |  |  |  | Luther A (1963): 125 | 
| E4 | Nilivaara, Finland | 2990 
  map | Jun 26, 1950 |  |  |  |  |  | Luther A (1963): 125 | 
| F4 | Sotkajärvi, Finland | 4990 
  map | Jun 26, 1950 |  |  |  |  | zwischen Wasserpflanzen in Ufernähe (Karling, Luther & Papi) | Luther A (1963): 125 | 
| G4 | Vesijarven Kanava (Vaaksy, Vääksy, Vaaskyn), Finland | 2989 
  map | May 14, 1952 |  |  |  |  | Vääksy, Ufer des Päijänne, 8.9 ºC. | Luther A (1963): 125 | 
| H4 | Päijänne, Finland | 5714 
  map | May 14, 1952 |  |  |  |  | Vääksy, Ufer des Päijänne, 8.9 ºC. | Luther A (1963): 125 | 
| I4 | Janakkala, Finland | 2983 
  map | May 19, 1959 |  |  |  |  |  | Luther A (1963): 125 | 
| J4 | Puujoki, Finland | 2985 
  map | May 19, 1959 |  |  |  |  |  | Luther A (1963): 125 | 
| K4 | Lohjanjarvi (Lohjanjärvi, Lojo-See, Lojosjö, Lojosee), Finland | 2986 
  map | Jul-Aug 1902 |  |  |  |  | Lojo-See = Lohjanjärvi, flache Ufer u. Ufertümpel. | Luther A (1963): 125 | 
| L4 | Tenala (Tenhola), Finland | 2974 
  map | 1963 or earlier |  |  |  |  | Ekträsk u. Spjutsböle träsk, Södra Vitträsk | Luther A (1963): 125 | 
| M4 | Spjutsböle, Finland | 4804 
  map | 1963 or earlier |  |  |  |  | Ekträsk u. Spjutsböle träsk, Södra Vitträsk | Luther A (1963): 125 | 
| N4 | Vitträsk, Finland | 5616 
  map | 1963 or earlier |  |  |  |  | Ekträsk u. Spjutsböle träsk, Södra Vitträsk | Luther A (1963): 125 | 
| O4 | Fiskars, Pohja (Pojo), Finland | 4803 
  map | 1963 or earlier |  |  |  |  | Pojo, Fiskars å u. innerster Teil der Pojo-Wiek bei Skuru, Malmholmen, in fast ganz ausgessüstem Wasser. | Luther A (1963): 125 | 
| P4 | Pohjanlahti (Pojo Wiek, Pojowiek, Pojoviken, Pohjanpitäjanlahti), Finland | 5465 
  map | 1963 or earlier |  |  |  |  | Pojo, Fiskars å u. innerster Teil der Pojo-Wiek bei Skuru, Malmholmen, in fast ganz ausgessüstem Wasser. | Luther A (1963): 125 | 
| Q4 | Pohjankuru (Skuru), Finland | 5887 
  map | 1963 or earlier |  |  |  |  | Pojo, Fiskars å u. innerster Teil der Pojo-Wiek bei Skuru, Malmholmen, in fast ganz ausgessüstem Wasser. | Luther A (1963): 125 | 
| R4 | Bromarv (Bromary, Bromarr, Bromarf), Finland | 3478 
  map | 1963 or earlier |  |  |  |  |  | Luther A (1963): 125 | 
| S4 | Taktom (Täcktom, Taktun), Finland | 3180 
  map | 1963 or earlier |  |  |  |  |  | Luther A (1963): 125 | 
| T4 | Ekenas (Ekenäs, Tammisaari, Tammisari), Finland | 2932 
  map | 1963 or earlier |  |  |  |  |  | Luther A (1963): 125 | 
| U4 | Esbo (Espoo), Finland | 2975 
  map | 1963 or earlier |  |  |  |  |  | Luther A (1963): 125 | 
| V4 | Ruuhijärvi, Finland | 5679 
  map | 1963 or earlier |  |  |  |  |  | Luther A (1963): 125 | 
| W4 | Sotkajärvi, Finland | 4990 
  map | Jun 25, 1950 |  |  |  |  | Sotkajärvi bei Nilivaara. | Luther A (1963): 126 | 
| X4 | Keitele (See Keitele, Keytele), Finland | 5704 
  map | 1897 |  |  |  |  |  | Luther A (1963): 126 | 
| Y4 | Sumiainen (Sumiaisenjärvi, Sumiaisjärvi, Vankiselkä) | 5705 
  map | 1897 |  |  |  |  |  | Luther A (1963): 126 | 
| Z4 | Janakkala, Finland | 2983 
  map | 1963 or earlier |  |  |  |  |  | Luther A (1963): 126 | 
| A5 | Leppäkoski, Finland | 5606 
  map | 1963 or earlier |  |  |  |  |  | Luther A (1963): 126 | 
| B5 | Puujoki, Finland | 2985 
  map | 1963 or earlier |  |  |  |  |  | Luther A (1963): 126 | 
| C5 | Lake Ladoga (Laatokka, Ladozhskoye Ozero, Ladogasee), Russia | 5660 
  map | 1917 and earlier |  |  |  |  | See Ladoga bei Sortavala und Valamo. | Nasonov NV (1917): from Luther 1963 (citation)- p. 126 | 
| D5 | Valaam (Valamo), Russia | 5806 
  map | 1917 and earlier |  |  |  |  | See Ladoga bei Sortavala und Valamo. | Nasonov NV (1917): from Luther 1963 (citation)- p. 126 | 
| E5 | Sortavala (Serdobol),  Republic of Karelia, Russia | 5659 
  map | 1917 and earlier |  |  |  |  | See Ladoga bei Sortavala und Valamo. | Nasonov NV (1917): from Luther 1963 (citation)- p. 126 | 
| F5 | Lohjanjarvi (Lohjanjärvi, Lojo-See, Lojosjö, Lojosee), Finland | 2986 
  map | 1963 or earlier |  |  |  |  | Lojo-See = Lohjanjärvi, häufig, überall in der Vegetations-zone u. in Ufertümpel, Hormajärvi. | Luther A (1963): 126 | 
| G5 | Hormajarvi (Hormajärvi), Finland | 3029 
  map | 1963 or earlier |  |  |  |  | Lojo-See = Lohjanjärvi, häufig, überall in der Vegetations-zone u. in Ufertümpel, Hormajärvi. | Luther A (1963): 126 | 
| H5 | Vihti, Finland | 4802 
  map | 1963 or earlier |  |  |  |  |  | Luther A (1963): 126 | 
| I5 | Vihtijärvi (Vihtjärvi ), Finland | 5719 
  map | 1963 or earlier |  |  |  |  |  | Luther A (1963): 126 | 
| J5 | Hylta Långträsk (Hylta Långsträsket), Finland | 5904 
  map | 1963 or earlier |  |  |  |  | Tenala:  Hylta Långträsk u. dessen Ausfluss in Stormossen | Luther A (1963): 126 | 
| K5 | Moor Stormossen, Finland | 5905 
  map | 1963 or earlier |  |  |  |  | Tenala:  Hylta Långträsk u. dessen Ausfluss in Stormossen | Luther A (1963): 126 | 
| L5 | Vitträsk, Finland | 5616 
  map | 1963 or earlier |  |  |  |  | Sodra Vitträsk. | Luther A (1963): 126 | 
| M5 | Pohja (Pojo), Finland | 2931 
  map | 1963 or earlier |  |  |  |  |  | Luther A (1963): 126 | 
| N5 | Grabbskog Storträsket, Finland | 5902 
  map | 1963 or earlier |  |  |  |  |  | Luther A (1963): 126 | 
| O5 | Grabbskog Lillträsket, Finland | 5903 
  map | 1963 or earlier |  |  |  |  |  | Luther A (1963): 126 | 
| P5 | Fiskars, Pohja (Pojo), Finland | 4803 
  map | 1963 or earlier |  |  |  |  | Fiskars å und Svartån, auch in stark strömendem Wasser bei Karis Landsbro | Luther A (1963): 126 | 
| Q5 | Karjaa (Karis), Finland | 4806 
  map | 1963 or earlier |  |  |  |  | Fiskars å und Svartån, auch in stark strömendem Wasser bei Karis Landsbro | Luther A (1963): 126 | 
| R5 | Åminne (Åmiune), Finland | 5613 
  map | 1963 or earlier |  |  |  |  | Pojowiek, an der Mündung der genannten Flüsse bei Åminne und in der Gumnäs-Einfahrt. | Luther A (1963): 126 | 
| S5 | Gumnäs, Pohja, Finland | 5935 
  map | 1963 or earlier |  |  |  |  | Pojowiek, an der Mündung der genannten Flüsse bei Åminne und in der Gumnäs-Einfahrt. | Luther A (1963): 126 | 
| T5 | Farten (See Fårtjärnan), Finland | 5886 
  map | 1963 or earlier |  |  |  |  |  | Luther A (1963): 126 | 
| U5 | Ekenas (Ekenäs, Tammisaari, Tammisari), Finland | 2932 
  map | 1963 or earlier |  |  |  |  |  | Luther A (1963): 126 | 
| V5 | Gulltjärn, Finland | 5724 
  map | 1963 or earlier |  |  |  |  |  | Luther A (1963): 126 | 
| W5 | Gullö (Gulé Landet ), Finland | 5675 
  map | 1963 or earlier |  |  |  |  |  | Luther A (1963): 126 | 
| X5 | Bytrask (Byträsk), Finland | 2976 
  map | 1963 or earlier |  |  |  |  |  | Luther A (1963): 126 | 
| Y5 | Långträsk (Langtrask, Långsträsket), Finland | 2978 
  map | 1963 or earlier |  |  |  |  |  | Luther A (1963): 126 | 
| Z5 | Gvardeyskoye (Гвардейское, Karisalmi), Russia | 5685 
  map | 1963 or earlier |  |  |  |  |  | Luther A (1963): 126 | 
| A6 | Salojärvi, Finland | 5826 
  map | 1963 or earlier |  |  |  |  |  | Luther A (1963): 126 | 
| B6 | Mecklenburg, Germany | 5977 
  map | 1887 and earlier |  |  |  |  |  | Zacharias O (1887): from Luther 1963 (citation)- p. 126 | 
| C6 | West Prussia (Westpreußen, Prusy Zachodnie), Poland | 5978 
  map | 1887 and earlier |  |  |  |  |  | Zacharias O (1887): from Luther 1963 (citation)- p. 126 | 
| D6 | Schleswig-Holstein, Germany | 5786 
  map | 1887 and earlier |  |  |  |  |  | Rixen J-U (1961): from Luther 1963 (citation)- p. 126 | 
| E6 | Königsberg, Germany | 5979 
  map | 1936 and earlier |  |  |  |  |  | Müller HG (1936): from Luther 1963 (citation)- p. 126 | 
| F6 | Kurmark, Germany | 3468 
  map | 1942 or earlier |  |  |  |  |  | Weise M (1942): from Luther 1963 (citation)- p. 126 | 
| G6 | Salzburg, Austria | 5891 
  map | 1912 or earlier |  |  |  |  |  | Micoletzky H (1912): from Luther 1963 (citation)- p. 126 | 
| H6 | Tallinn (Reval, Kallinn, Kolyvan, Rääveli), Estonia | 5981 
  map | 1908 or earlier |  |  |  |  | Baltikum:  Reval, Obersee | Schneider G (1908): from Luther 1963 (citation)- p. 126 | 
| I6 | Ülemiste Järv (Ober-See, Obersee, Bumajnoi Lake, Ozero Yulemiste), Estonia | 5982 
  map | 1908 or earlier |  |  |  |  | Baltikum:  Reval, Obersee | Schneider G (1908): from Luther 1963 (citation)- p. 126 | 
| J6 | Lake Peipus (Peipsi, Chudskoe, Peypsi-Yarv, Peipsenjarvi, Peipaus Ezeras), Estonia | 2629 
  map | 1885 or earlier |  |  |  |  |  | Braun M (1885): from Luther 1963 (citation)- p. 126 | 
| K6 | Dorpat (Tartu, Terbata, Tartto, Derpt, Yurev, Yur'yev),  Estonia | 2451 
  map | 1885 or earlier |  |  |  |  |  | Braun M (1885): from Luther 1963 (citation)- p. 126 | 
| L6 | Poland (Polen) | 4037 
  map | 1959 or earlier |  |  |  |  |  | Chodorowski A (1959): and Chodorowski 1960 (citation) and (citation); from Luther 1963 (citation)- p. 126 | 
| M6 | White Sea (Beloye More, Weisses Meer), Gulf of Solowetzk (Solowetsk, Solowjetsk, Solovetskiy, Ostrov, Solowetzki, Solovetski Island; Solowezki, Solovets, Solovjetsk), Russia | 1226 
  map | 1900 or earlier |  |  |  |  |  | Sabussow H (1900): from Luther 1963 (citation)- p. 126 | 
| N6 | Saint Petersburg (Sankt-Peterburg, Petrogrado, Petrograd, Leningrad), Russia | 1708 
  map | 1924 or earlier |  |  |  |  |  | Nasonov NV (1924): from Luther 1963 (citation)- p. 126 | 
| O6 | Perm (Perm'), Russia | 5839 
  map | 1921 or earlier |  |  |  |  |  | Beklemischev VN (1921): from Luther 1963 (citation)- p. 126 | 
| P6 | Kirov (Wjatka, Киров, Khlynov , Kirow, Viatka, Vyatka, Vjatka), Russia | 5792 
  map | 1921 or earlier |  |  |  |  |  | Nasonov NV (1921): from Luther 1963 (citation)- p. 126 | 
| Q6 | Bologoye (Bologoje), Russia | 2463 
  map | 1906 or earlier |  |  |  |  |  | Plotnikow W (1906): from Luther 1963 (citation)- p. 126 | 
| R6 | Saratov (Saretow, Saratow), Russia | 2638 
  map | 1921 or earlier |  |  |  |  |  | Nasonov NV (1921): from Luther 1963 (citation)- p. 126 | 
| S6 | Tien Shan(Tien-Shan, Tien Range, Tien Shan Mountains, T'ien-shan Shan-mo, T'ien-Shan Range, Thian Schan, Tyan' Shan', Thian Shan, Tienschan), Kyrgyzstan | 2737 
  map | 1908 or earlier |  |  |  |  | 600 m ü.M. | Bendl WE (1908): from Luther 1963 (citation)- p. 126 | 
| T6 | Tomsk, Siberia, Russia | 2631 
  map | 1921 or earlier |  |  |  |  |  | Beklemischev VN (1921): from Luther 1963 (citation)- p. 126 | 
| U6 | Bos-See (Bossee), Schleswig-Holstein, Germany | 6539 
  map | Jul 16, 1957 |  |  |  |  | unter Nuphar-Blättern (1 Ex.) | Rixen J-U (1961): 506 | 
| V6 | Einfelder See, Schleswig-Holstein, Germany | 6533 
  map | Aug 26, 1957 |  |  |  |  | Phytal  (1 Ex.) | Rixen J-U (1961): 506 | 
| W6 | Lüttauer See (Lütichauer), Schleswig-Holstein, Germany | 6540 
  map | Sep 2, 1956 |  |  |  |  | unter Nuphar-Blättern  (1 Ex.)  [reprint Lütichauer See, should it be Lüttauer See?} | Rixen J-U (1961): 506 | 
| X6 | Lebrader Teich, Schleswig-Holstein, Germany | 5993 
  map | Jun 17, 1958 |  |  |  |  | Phytal  (2 Ex.) | Rixen J-U (1961): 506 | 
| Y6 | Lebrader Teich, Schleswig-Holstein, Germany | 5993 
  map | Jul 1, 1958 |  |  |  |  | Phytal  (7 Ex.) | Rixen J-U (1961): 506 | 
| Z6 | Lebrader Teich, Schleswig-Holstein, Germany | 5993 
  map | Jul 31, 1958 |  |  |  |  | Phytal  (7 Ex.) | Rixen J-U (1961): 506 | 
| A7 | Schmalstede, Schleswig-Holstein, Germany | 6541 
  map | Aug 18, 1957 |  |  |  |  | Mühlenteich, zwischen Fadenalgen  (5 Ex.) | Rixen J-U (1961): 506 | 
| B7 | Leck, Schleswig-Holstein, Germany | 6531 
  map | Sep 22, 1957 |  |  |  |  | Wiesengraben bei Leck (Krs. Südtondern)  (sehr häufig) | Rixen J-U (1961): 506 | 
| C7 | Hamburg, Germany | 2772 
  map | Jun 22, 1958 |  |  |  |  | Billwerder bei Hamburg, alter Torfstich mit Potamogeton (20 Ex.) | Rixen J-U (1961): 506 | 
| D7 | Ratzeburger See, Schleswig-Holstein, Germany | 6542 
  map | 1894 or earlier |  |  |  |  | im Grossen Eutiner und Ratzeburger See, nach handschriftlicher Ergänzung zu Zacharias 1894 auch im Grossen Plöner See beobachtet. | Zacharias O (1887): and Zacharias 1894 (citation); from Rixen 1961 (citation)- 506 | 
| E7 | Großer Eutiner See, Schleswig-Holstein, | 6543 
  map | 1894 or earlier |  |  |  |  | im Grossen Eutiner und Ratzeburger See, nach handschriftlicher Ergänzung zu Zacharias 1894 auch im Grossen Plöner See beobachtet. | Zacharias O (1887): and Zacharias 1894 (citation); from Rixen 1961 (citation)- 506 | 
| F7 | Plöner Lake (Grosser Ploner See, Ploner, Plönersee, Plöner See, Great Lake Plön), Germany | 2655 
  map | 1894 or earlier |  |  |  |  | im Grossen Eutiner und Ratzeburger See, nach handschriftlicher Ergänzung zu Zacharias 1894 auch im Grossen Plöner See beobachtet. | Zacharias O (1887): and Zacharias 1894 (citation); from Rixen 1961 (citation)- 506 | 
| G7 | Schleswig-Holstein, Germany | 5786 
  map | 1887 or earlier |  |  |  |  | in zahlreichen schleswig-holsteinischen Seen gefunden. | Zacharias O (1887): from Rixen 1961 (citation)- 506 | 
| H7 | Bos-See (Bossee), Schleswig-Holstein, Germany | 6539 
  map | Jul 16, 1957 |  |  |  |  | unter Nuphar-Blättern (20 Ex.) | Rixen J-U (1961): 506 | 
| I7 | Schulen-See (Schulensee), Schleswig-Holstein, Germany | 6002 
  map | Jun 25, 1957 |  |  |  |  | Phytalregion  (3 Ex.) | Rixen J-U (1961): 506 | 
| J7 | Schulen-See (Schulensee), Schleswig-Holstein, Germany | 6002 
  map | Jul 23, 1958 |  |  |  |  | Phytalregion  (20 Ex.) | Rixen J-U (1961): 506 | 
| K7 | Brahmsee, Schleswig-Holstein, Germany | 6537 
  map | Jul 16, 1957 |  |  |  |  | bei Eisendorf, Phytal  (1 Ex.) | Rixen J-U (1961): 506 | 
| L7 | Drüsensee, Schleswig-Holstein, Germany | 6544 
  map | Jul 12, 1957 |  |  |  |  | Phytal  (3 Ex.) | Rixen J-U (1961): 506 | 
| M7 | Lüttauer See (Lütichauer), Schleswig-Holstein, Germany | 6540 
  map | Sep 2, 1956 |  |  |  |  | Phytal  (1 Ex.) | Rixen J-U (1961): 506 | 
| N7 | Yaroslavi region, Upper Volga River Basin, Russia | 7317 
  map | 2015 or earlier |  |  |  |  |  | Korgina YM (2015): from abstract |