• Development of amoebae systematics produced lots of species names and many different systems, based on various background. The result is a a huge number of synonims and certain mess with the names and position of genera and families. Since F.C. Page published his revised classification of gymnamoebae in 1987, no real attempt was done to deal with the accumulating changes in amoebae systematics (long expected second edition of the "Illustrated Guide to Protozoa" is a special matter that I'll discuss later). The need in the list like this thus seems to be evident.

• This list includes all valid and recognisable (i.e. species which we can identify with sufficient level of confidence) species of Gymnamoebia (Rhizopoda, Lobosea). The criteria of inclusion are:
  1. Species must be recognisable with sufficient level of confidence. For example, "Amoeba annulata" Penard 1902 was documented with few line drawings, but the description contained several unique features of this species, that finally allowed to recognise and re-describe it (Smirnov & Goodkov, 1998). In contrast, "Amoeba elongata" Korotneff, 1880 - the "type" species of the genus Dactylamoeba sensu F.C. Page (listed as Korotnevella in the present list, see Smirnov, 1997 for details) has no distinctiv features leaving any chance to re-isolate it and thus is not listed here.

  2. Species description must be valid, i.e. to fit the basic taxonomical requirements (see International Code of Zoological Nomenclature). It may look old fashioned, but I do call to keep within the frames of the code. With all its disadvantages, it accumulates a lot of experience of taxonomists and allow certain standartisation of the usage and creation of names, so important in systematics. I do not include species and genera established solely basing on biochemical (e.g. "Metamoeba" Friz 1999) and molecular data, without proper diagnoses. The reason is that the recognition of these genera and species among usual morphospecies will evidently produce a mess related with the unequal level of taxonomical resolution through the taxa.

• Identification of an isolate as a species, not listed here, requires special motivation and respective taxonomically valid re-description of a species prior to use its name.

• I will develop this list as a guide to Gymnamoebia, incorporating illustrations, brief species descriptions, advices on identification and basic references and sources of strains for each species. This is a lasting work, so I will add new materials step by step. If the species name is a hypertext reference - this means that there are materials on the species.

1. Amoeba proteus (Pallas, 1766) Leidy, 1878
2. Amoeba borokensis Kalinina, Afon'kin, Gromov, Khrebtukova & Page, 1987
3. Amoeba leningradensis Page & Kalinina, 1984
4. Amoeba amazonas Flickinger, 1974
5. Chaos carolinense (Willson, 1900) King & Jahn, 1948
6. Chaos illinoisense (Kudo, 1950) Bovee & Jahn, 1973
7. Chaos nobile (Penard, 1902) Bovee & Jahn, 1973
8. Chaos glabrum Smirnov & Goodkov, 1997
9. Polychaos fasciculatum (Penard, 1902) Schaeffer, 1926
10. Polychaos annulatum (Penard, 1902) Smirnov & Goodkov, 1998
11. Polychaos dubium (Schaeffer, 1916) Schaeffer, 1926
12. Polychaos nitidubium Bovee, 1970 ultrastructure unknown, needs re-isolation
13. Deuteramoeba algonquinensis (Baldock, Rogerson & Berger, 1983) Page, 1987
14. Deuteramoeba mycophaga (Pussard, Alabouvette & Pons, 1980) Page, 1988
15. Trichamoeba sinuosa Siemensma & Page, 1986
16. Trichamoeba myakka Bovee, 1972 ultrastructure unknown, needs re-isolation
17. Trichamoeba cloaca Bovee, 1972 ultrastructure unknown, needs re-isolation
18. Trichamoeba osseosaccus Schaeffer, 1926 ultrastructure unknown, needs re-isolation
19. Parachaos zoochlorellae (Willumsen, 1982) Willumsen, Siemensma & Suhr-Jessen, 1987
20. Hydramoeba hydroxena (Entz, 1912) Reynolds & Looper, 1928

1. Saccamoeba stagnicola Page, 1974
2. Saccamoeba limax (Dujardin, 1841) Page, 1974
3. Saccamoeba lucens Frenzel, 1892 ultrastructure unknown, needs re-isolation
4. Saccamoeba wakulla Bovee, 1972 ultrastructure unknown, needs re-isolation
5. Saccamoeba limna Bovee, 1972 ultrastructure unknown, needs re-isolation
6. Saccamoeba wellneri Siemensma, 1987 ultrastructure unknown, needs re-isolation
7. Saccamoeba marina Anderson, Rogerson & Hannah, 1997
8. Cashia limacoides (Page, 1967) Page, 1974
9. Glaeseria mira (Glaeser, 1912) Volkonsky, 1931
10. Hartmannella cantabrigiensis Page, 1974
11. Hartmannella vermiformis Page, 1967
12. Hartmannella lobifera Smirnov, 1997
13. Hartmannella abertawensis Page, 1980
14. Hartmannella vacuolata Anderson, Rogerson & Hannah, 1997
15. Nolandella hibernica (Page, 1980) Page, 1983

1. Thecamoeba striata (Penard, 1890) Schaeffer, 1926
2. Thecamoeba quadrilineata (Carter, 1856) Lepsi, 1960
3. Thecamoeba munda (Schaeffer, 1926) Smirnov, 1999
4. Thecamoeba orbis Schaeffer, 1926
5. Thecamoeba hilla Schaeffer, 1926
6. Thecamoeba sparolata Fishbeck & Bovee, 1993
7. Thecamoeba sphaeronucleolus (Greef, 1891) Schaeffer, 1926
8. Thecamoeba verrucosa (Ehrenberg, 1838) Schaeffer, 1926
9. Thecamoeba terricola (Greef, 1866) Lepsi, 1960
10. Thecamoeba similis (Greef, 1891) Lepsi, 1960
11. Sappinia diploidea (Hartmann & Naegler, 1908) Alexieff, 1912
12. Dermamoeba granifera (Greef, 1866) Page & Blakey, 1979
13. Dermamoeba minor (Pussard, Alabouvette & Pons, 1979) Page, 1988
14. Paradermamoeba valamo Smirnov & Goodkov, 1993
15. Paradermamoeba levis Smirnov & Goodkov, 1994
16. Pseudothecamoeba proteoides (Page, 1976) Page, 1988
17. Thecochaos album (Greef, 1891) Page, 1981 known from stained preparations only, needs re-isolation
18. Thecochaos fibrillosum (Greef, 1891) Page, 1981 known from stained preparations only, needs re-isolation

1. Vannella simplex (Wohlfarth-Bottermann, 1960) Smirnov, Nassonova, Holzmann and Pawlowski, 2002
2. Vannella platypodia (Glaeser, 1912) Page, 1976
3. Vannella lata Page, 1988
4. Vannella cirifera (Frenzel, 1892) Page, 1988
5. Vannella miroides Bovee, 1965
6. Vannella persistens Smirnov & Brown, 2000
7. Vannella peregrinia Smirnov & Fenchel, 1996
8. Vannella devonica Page, 1979
9. Vannella aberdonica Page, 1980
10. Vannella caledonica Page, 1979
11. Vannella arabica Page, 1980
12. Vannella anglica Page, 1980
13. Vannella serpentrionalis Page, 1980
14. Vannella sensilis Bovee & Sawyer, 1979 ultrastructure unknown, needs re-isolation
15. Vannella mira (Schaeffer, 1926) Smirnov, 2002
16. Vannella ebro Smirnov, 2001
17. Platyamoeba placida (Page, 1968) Page, 1969
18. Platyamoeba stenopodia Page, 1969
19. Platyamoeba schaefferi Singh & Hanumaiah, 1979
20. Platyamoeba plurinucleolus Page, 1974
21. Platyamoeba calycinucleolus Page, 1974
22. Platyamoeba bursella Page, 1974
23. Platyamoeba australis Page, 1983
24. Platyamoeba mainensis Page, 1971
25. Platyamoeba flabellata Page, 1974
26. Platyamoeba pseudovannellida Hauger, Rogerson & Anderson, 2001
27. Platyamoeba murchelanoi Sawyer, 1975 ultrastructure unknown, generic position questionable
28. Platyamoeba langae Sawyer, 1975 ultrastructure unknown, generic position questionable
29. Platyamoeba weinsteini Sawyer, 1975 ultrastructure unknown, generic position questionable
30. Platyamoeba douvresi Sawyer, 1975 ultrastructure unknown, generic position questionable
31. "Clydonella" rosenfeldi Sawyer, 1975 ultrastructure unknown, generic position questionable
32. "Clydonella" sindermanni Sawyer, 1975 ultrastructure unknown, generic position questionable
33. "Clydonella" wardi Sawyer, 1975 ultrastructure unknown, generic position questionable
34. "Lingulamoeba" leei Sawyer, 1975 ultrastructure unknown, generic position questionable
35. "Pessonella" marginata Pussard, 1973 ultrastructure unknown, generic position questionable

Family Paramoebidae (Poche, 1913) Page, 1987

1. Mayorella viridis (Leidy, 1874) Harnisch, 1968
2. Mayorella cantabrigiensis Page, 1983
3. Mayorella vespertilioides Page, 1983
4. Mayorella penardi Page, 1972
5. Mayorella bigemma (Schaeffer, 1926) Schaeffer, 1926 ultrastructure unknown, needs re-isolation
6. Mayorella augusta Schaeffer, 1926 ultrastructure unknown, needs re-isolation
7. Mayorella pussardi Hollande, Nicolas & Escaig, 1981
8. Mayorella kuwaitensis (Page, 1982) Page, 1983
9. Mayorella gemmifera Schaeffer, 1926
10. Mayorella dactylifera Goodkov & Buryakov, 1986
11. Korotnevella stella (Schaeffer, 1926) Goodkov, 1988
12. Korotnevella bulla (Schaeffer, 1926) Goodkov, 1988
13. Korotnevella diskophora Smirnov, 1999
14. Korotnevella nivo Smirnov, 1997
15. Korotnevella hemistilolepis O'Kelly, Peglar, Black, Sawyer & Nerad, 2001
16. Korotnevella monacantholepis O'Kelly, Peglar, Black, Sawyer & Nerad, 2001
17. Paramoeba eilhardi Schaudinn, 1896

F.C. Page in his keys use the generic name "Dactylamoeba Korotneff, 1880" (Page, 1981-Protistologica 17: 543-562) which was replaced with the name "Korotnevella" by Goodkov (1988-Zoologicheskij journal 67: 1728-1730). The generic name "Dactylamoeba" is incorrect and should not be used. See Smirnov (1997-Arch. Protistenk. 147: 283-292) for details.

Family Vexilliferidae Page, 1987

1. Vexillifera bacillipedes Page, 1969
2. Vexillifera granatensis Mascaro, Osuna & Mascaro, 1986
3. Vexillifera lemani Page, 1976 ultrastructure unknown, needs re-isolation
4. Vexillifera minutissima Bovee & Sawyer, 1979 ultrastructure unknown, needs re-isolation
5. Vexillifera armata Page, 1979
6. Vexillifera telmathalassa Bovee, 1956 ultrastructure unknown, needs re-isolation
7. Vexillifera aurea Schaeffer, 1926 ultrastructure unknown, needs re-isolation
8. Vexillifera browni Sawyer, 1975 ultrastructure unknown, needs re-isolation
9. Vexillifera ottoi Sawyer, 1975 ultrastructure unknown, needs re-isolation
10. Pseudoparamoeba pagei (Sawyer, 1975) Page, 1983
11. Neoparamoeba pemaquidensis Page, 1970
12. Neoparamoeba aestuarina Page, 1970

Order Leptomyxida (Pussard & Pons, 1976) Page, 1987
Suborder Rhizoflabellina Page, 1987
Family Flabellulidae Bovee, 1970

1. Flabellula citata Schaeffer, 1926
2. Flabellula calkinsi (Hogue, 1914) Page, 1983
3. Flabellula demetica Page, 1980
4. Flabellula trinovanica Page, 1980
5. Flabellula baltica Smirnov, 1999
6. Paraflabellula kudoi (Singh & Hanumaiah, 1979) Page, 1983
7. Paraflabellula reniformis (Schmoller, 1964) Page, 1983
8. Paraflabellula hoguae (Sawyer, 1975) Page, 1983
9. Flamella citrensis Bovee, 1956
10. Flamella magnifica Schaeffer, 1926
11. Flamella tiara Fishbeck & Bovee, 1993
12. Flamella lacustris Michel & Smirnov, 1999
13. Flamella aegyptia Michel & Smirnov, 1999

1. Leptomyxa reticulata Goodey, 1914
2. Leptomyxa fragilis (Penard, 1904) Siemensma, 1987
3. Rhizamoeba polyura Page, 1972
4. Rhizamoeba saxonica Page, 1974
5. Rhizamoeba australiensis (Chakraborty & Pussard, 1985) Page, 1988
6. Rhizamoeba schnepfi
7. Rhizamoeba clavarioides (Penard, 1902) Siemensma, 1980
8. Rhizamoeba flabellata (Goodey, 1914) Cann, 1984
9. Rhizamoeba caerulea (Schaeffer, 1926) Siemensma, 1980

1. Gephyramoeba delicatula Goodey, 1914

1. Stereomyxa ramosa Grell, 1966
2. Stereomyxa angulosa Grell, 1966

1. Corallomyxa chatonni Grell & Benwitz, 1978
2. Corallomyxa mutabilis Grell, 1966
3. Corallomyxa multipara Grell, 1988

Species composition of the genus Acanthamoeba is questionable, and non-morphological methods require to distinguish some species. There are serious disagreements between authors about the validity of species and sinonymics. In contrast with other sections of this checklist, here only approximate species composition is listed - namely, species, recognisable at the morphological level and accepted by most of scientists. I would be grateful for any comments on the composition of the genus Acanthamoebae.
1. Acanthamoeba tubiashi Lewis & Sawyer, 1979
2. Acanthamoeba astronixis (Ray & Hayes, 1954) Page, 1967
3. Acanthamoeba comandoni Pussard, 1964
4. Acanthamoeba lugdunensis Pussard & pons, 1977
5. Acanthamoeba castellanii (Douglas, 1930) Volkonski, 1931
6. Acanthamoeba rhysodes (Singh, 1952) Griffin, 1972
7. Acanthamoeba mauritaniensis Pussard & Pons, 1977
8. Acanthamoeba polyphaga (Pushkarew, 1913) Volkonsky, 1931
9. Acanthamoeba griffini Sawyer, 1971
10. Acanthamoeba quina Pussard & Pons, 1977
11. Acanthamoeba divionensis Pussard & Pons, 1977
12. Acanthamoeba triangularis Pussard & Pons, 1977
13. Acanthamoeba hatchetti Sawyer, Visvesvara & Harke, 1977
14. Acanthamoeba palestinensis (Reich, 1933) Page, 1977 the species Acanthamoeba pustulosa we accept to be a synonyme of A. palestinensis
15. Acanthamoeba royreba Willaert, Stevens & Tyndall, 1978
16. Acanthamoeba culbertsoni (Singh & Das, 1970) Griffin, 1972
17. Acanthamoeba lenticulata Molet & Ermolieff-Braun, 1976
18. Acanthamoeba gigantea Schmoller, 1964
19. Acanthamoeba jacobsi Sawyer, Nerad & Visvesvara, 1992
20. Acanthamoeba stevensoni Sawyer, Nerad, Lewis & McLaughlin, 1993
21. Acanthamoeba pearcei Nerad, Sawyer, Levis & McLaughlin, 1995
22. Acanthamoeba healyi Moura, Wallace & Visvesvara, 1992
23. Protacanthamoeba caledonica Page, 1981
24. Protacanthamoeba invadens (Singh & Hanumaiah, 1979) Page, 1981

• Family Echinamoebidae Page, 1975
  1. Echinamoeba exudans Page, 1975
  2. Echinamoeba silvestris Page, 1975
  3. Filamoeba nolandi Page, 1967
  4. Comandonia operculata Pernin & Pussard, 1979

• Genus Stygamoeba (Sawyer, 1975) Smirnov, 1995
  1. Stygamoeba polymorpha Sawyer, 1975
  2. Stygamoeba regulata Smirnov, 1995