Species diversity, revealed in the bottom sediments of the Lake Leshevoe in the period 1989-1999 (250 single samples and 5 monitoring sites)



Some amoebae species, found in the bottom sediments of Leshevoe Lake


  • 32 species of Euamoebida (6 families, 15 genera) and 4 species of Leptomyxida (2 families, 4 genera) were found (Smirnov & Goodkov, 1995). This is sufficient amount of species - about 20% of amoebae, described in the latest key by F.C. Page.
  • 14 species are new for science. Some of them are already described, other are indicated as "new species" in the species list. Only few of listed species were determined only by light microscopy (they are specially indicated), other were determined after studing with both light- and electron-microscopy
  • In this connection, an interesting comparison may be done. Finlay, Fenchel and co-workers evaluated the number of well-described ciliate species as "about 3000". Data, collected by Berlina show that there is about 180 species of ciliates, inhabiting lakes of Valamo island. Thus, even if to take overall data on the island (which contains 10 lakes in addition to the studied Leshvoe Lake), only 6% of known diversity was discovered for ciliates. For amoebae - 20%. This may suggest that the biodiversity of amoebae is still very poorly known. Another point supporting this opinion is that among 32 species 14 were found to be new for science.

    Reference: Smirnov A.V.& Goodkov A.V. 1995. Zoosystematica Rossica, 1995, v. 4: 201-203

    This chart represents the cumulative curve, showing the discovery of species during the study. The curve reaches saturation in 1995, thus we can suggest that all or very most of species, which we were able to isolate with rather wide spectrum of methods used, have been noted.



  • Folowing list of species gives access to the plates of original photographs for each species

    Order Euamoebida (Lepsi, 1960) Page, 1987
    Family Amoebidae Ehrenberg, 1838

  • Amoeba proteus (Pallas, 1766) Leidy, 1878
  • Chaos glabrum Smirnov & Goodkov, 1997
  • Polychaos annulatum (Penard, 1902) Smirnov & Goodkov, 1997
  • Trichamoeba sinuosa Siemensma & Page, 1986
    Family Thecamoebidae (Schaeffer, 1926) Smirnov & Goodkov, 1994
  • Thecamoeba striata (Penard, 1890) Schaeffer, 1926
  • Thecamoeba quadrilineata (Carter, 1856) Lepsi, 1960
  • Pseudothecamoeba proteoides (Page, 1976) Page, 1988
  • Paradermamoeba valamo Smirnov & Goodkov, 1992
  • Paradermamoeba levis Smirnov & Goodkov, 1994
    Family Vannellidae (Bovee, 1970) Page, 1987
  • Vannella simplex (Wohlfarth-Botterman, 1960) Bovee, 1965
  • Vannella platypodia (Glaeser, 1912) Page, 1976
  • Vannella miroides Bovee, 1965
  • Vannella sp. (new species)
  • Platyamoeba stenopodia Page, 1969
  • Platyamoeba sp. (1) (new species)
  • Platyamoeba sp. (2) (new species)
  • Pessonella sp. (new species)
    Family Vexilliferidae Page, 1987
  • Vexillifera bacillipedes Page, 1969
    Family Paramoebidae (Poche, 1913) Page, 1987
  • Mayorella vespertilioides Page, 1983
  • Mayorella cantabrigiensis Page, 1983
  • Mayorella viridis (Leidy, 1874) Harnisch, 1968
  • Korotnevella bulla (Schaeffer, 1926) Page, 1988 (as Dactylamoeba )
  • Korotnevella stella (Schaeffer, 1926) Page, 1988 (as Dactylamoeba )
  • Korotnevella discophora Smirnov, 1999
    Family Hartmannellidae (Volkonsky, 1931) Page, 1974
  • Hartmannella sp. (new species)
  • Saccamoeba limax (Dujardin, 1841) Page, 1974
  • Saccamoeba stagnicola Page, 1974
  • Saccamoeba sp. (new species)

    Order Leptomyxida (Pussard & Pons, 1976) Page, 1987
    Family Flabellulidae Bovee, 1970
  • Flabellula sp. (new species)
  • Flamella lacustris Michel & Smirnov, 1999
    Family Leptomyxidae (Pussard & Pons, 1976) Page, 1987
  • Rhizamoeba sp. (new species)