|  | site | site # (info) | collection date | kind | depth | substrate | salin | comments | reference | 
| A | Ledsham, United Kingdom | 2163 
  map | 1965-1967 |  |  |  | freshwater | from ponds, Grid Ref. 33333752. | Young JO (1970): 218 | 
| B | Razelm-Sinoë, Northern Bay-Sulina, Romania | 2575 
  map | Aug 12, 1970 |  |  |  | freshwater | Numerous specimens, 10 cm depth; predeltaic region, the Northern Bay, among plants, alluvial bottom. | Mack-Fira V (1974): 260 | 
| C | Catusa swamp, Siret River Meadow, Romania | 2592 
  map | 1974 or earlier |  |  |  | freshwater |  | Mack-Fira V (1974): 260 | 
| D | 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 | 
| E | Rehion Podillya (Podol'ye, Podolia, Podolien, Podole), Ukraine | 3853 
  map | 1933 or earlier | default type |  |  |  |  | Fulinski B, Szynal E (1933): abstract | 
| F | Lago di Garda (Benaco), Italy | 3859 
  map | 1932 or earlier | default type |  |  | freshwater | From the lake of Garda, and the lakes of Loppio, Tenno, and Ledro. | Steinböck O (1932): abstract | 
| G | Warszawa (Warschau, Varsavia, Varshava, Warsaw, Varsovie), Poland | 2674 
  map | 1926 or earlier |  |  |  |  | near Warsaw. | Gieysztor M (1926): abstract | 
| H | Tvärminne (Tvarminne), Finnish Bay, Finland | 2842 
  map | 1955 or earlier |  |  |  |  | Finnischer Meerbusen.  Vereinzelt in Buchten der Tvärminne-Region. | Luther A (1955): from Ax 2008 (citation)- p. 634 | 
| I | Selenter See, near Giekau, Schleswig-Holstein, Germany | 6015 
  map | Sep 3, 1957 |  |  |  |  | Selenter See, bei Giekau, zwischen angeschwemmten Pflanzenteilen (8 Ex.) | Rixen J-U (1961): 495 | 
| J | Selenter See, near Giekau, Schleswig-Holstein, Germany | 6015 
  map | Sep 8, 1957 |  |  |  |  | Selenter See, bei Giekau, zwischen angeschwemmten Pflanzenteilen (4 Ex.) | Rixen J-U (1961): 495 | 
| K | Laduviken, Stockholm, Sweden | 6922 
  map | Jul 8, 1952 |  |  |  |  | Stockholm, Laduviken. (Karling) | Luther A (1955): 121 | 
| L | Spjutsböle, Finland | 4804 
  map | Aug 1, 1950 |  |  |  |  | Pojo, Spjutsböle träsk, am Ufer innerhalb des Röhrichts, zwischen Hydrocharis und Nuphar, am Strande Sphagnum. | Luther A (1955): 121 | 
| M | Harparskog, Finland | 4805 
  map | Jul 5, 1951 |  |  |  |  | in dem aus Södra Vitträsk kommenden Bach, reiche Vegetation von Potamogeton natans, Utricularia vulgaris etc.. | Luther A (1955): 121 | 
| N | Kallvassa near Tvärminne, Finland | 5781 
  map | Jul 5, 1951 |  |  |  |  | Tvärminne, Kallvassa, etwa 20 cm tief (Hochwasser) 19.8º C. (Kinnander & A.L.) | Luther A (1955): 121 | 
| O | Pohjanlahti (Pojo Wiek, Pojowiek, Pojoviken, Pohjanpitäjanlahti), Finland | 5465 
  map | Aug 9, 1951 |  |  |  |  | Pojo-Wiek, am Aussenrande der nach Gumnäs führenden Bootrinne, in Ceratophyllum demersum u. Cladophora aegagropila-Decke am Boden | Luther A (1955): 121 | 
| P | Tuusulanjarvi (Tuusulanjärvi, Tusbyträsk, Tusby träsk), Finland | 3030 
  map | Jan 16, 1917 |  |  |  |  |  | Luther A (1955): 121 | 
| Q | Tuusula (Thusby, Tusby), Finland | 5617 
  map | Jan 16, 1917 |  |  |  |  |  | Luther A (1955): 121 | 
| R | Zelenogorsk (Teriyoki, Terijoki, Terioki, Poselok Terioki), Russia | 2992 
  map | 1921 or earlier |  |  |  |  |  | Beklemischev VN (1921): from Luther 1955 (citation)- p. 119 | 
| S | Päijänne, Finland | 5714 
  map | May 16, 1952 |  |  |  |  | Ufer des Päijänne am Kanal, cca 10 cm tief, Gras, viel totes Laub, 8.9º C | Luther A (1955): 121 | 
| T | Leningrad Province (Sankt-Peterburg, Saint Petersburg), Russia | 3893 
  map | 1926 or earlier |  |  |  |  | Umgebung von Leningrad | Nasonov NV (1926): from Luther 1955 (citation)- p. 121 | 
| U | Perm (Perm'), Russia | 5839 
  map | 1921 or earlier |  |  |  |  |  | Beklemischev VN (1921): from Luther 1955 (citation)- p. 121 | 
| V | Kirov (Wjatka, Киров, Khlynov , Kirow, Viatka, Vyatka, Vjatka), Russia | 5792 
  map | 1921 or earlier |  |  |  |  | Wjatka, Orlov | Nasonov NV (1921): from Luther 1955 (citation)- p. 121 | 
| W | Orlof (Orlov) near the Vyatka River, Russia | 5805 
  map | 1921 or earlier |  |  |  |  | Wjatka, Orlov | Nasonov NV (1921): from Luther 1955 (citation)- p. 121 | 
| X | Kurmark, Germany | 3468 
  map | 1942 or earlier |  |  |  |  | Kurmark (Weise 1942; die var. tectispinosa Weise dürfte grösstenteils auf Verunstaltungen der Rinne durch starke Quetschung zurückzuführen sein). | Weise M (1942): from Luther 1955 (citation)- p. 121 | 
| Y | Gardasee (Lago di Garda), Italy | 5912 
  map | 1932 or earlier |  |  |  |  |  | Steinböck O (1932): from Luther 1955 (citation)- p. 121 | 
| Z | Jezioro Wigry (Wigrysee, Wigry See, Wigry lake), Poland | 4999 
  map | 1932 or earlier |  |  |  |  |  | Steinböck O (1932): from Luther 1955 (citation)- p. 121 | 
| A1 | Warszawa (Warschau, Varsavia, Varshava, Warsaw, Varsovie), Poland | 2674 
  map | 1932 or earlier |  |  |  |  |  | Steinböck O (1932): from Luther 1955 (citation)- p. 121 | 
| B1 | Rehion Podillya (Podol'ye, Podolia, Podolien, Podole), Ukraine | 3853 
  map | 1932 or earlier |  |  |  |  |  | Steinböck O (1932): from Luther 1955 (citation)- p. 121 | 
| C1 | Podlasie, Poland | 6923 
  map | 1932 or earlier |  |  |  |  |  | Steinböck O (1932): from Luther 1955 (citation)- p. 121 | 
| D1 | Tomsk, Siberia, Russia | 2631 
  map | 1921 or earlier |  |  |  |  |  | Beklemischev VN (1921): from Luther 1955 (citation)- p. 121 |