• Acanthamoeba astronyxis (Ray & Hayes, 1954)
• Acanthamoeba castellanii (Douglas, 1930)
• Acanthamoeba comandoni Pussard, 1964
• Acanthamoeba culbertsoni (Singh & Das, 1970)
• Acanthamoeba gigantea Schmoller, 1964
• Acanthamoeba griffini Sawyer, 1971
• Acanthamoeba hatchetti Sawyer, Visvesvara & Harke, 1977
• Acanthamoeba hyalina (Dobell & O'Connor, 1921)
• Acanthamoeba lenticulata Molet & Ermolieff-Braun, 1976
• Acanthamoeba palestinensis (Reich, 1933)
• Acanthamoeba polyphaga (Puschkarew, 1913)
• Acanthamoeba rhysodes (Singh, 1953)
• Acanthamoeba royreba Willaert, Stevens & Tyndall, 1978
• Acanthamoeba stevensoni Sawyer, Nerad, Lewis & McLaughlin, 1993
• Acanthamoeba terricola Pussard, 1964
• Acanthamoeba tubiashi Lewis & Sawyer, 1979
• Adelphamoeba galeacystis J. Napolitano, M. Wall & C. Ganz
• Aethalium candidum (Pers.) Schltdl., 1827 accepted as Fuligo candida Pers., 1796
• Aethalium flavum (Pers.) Link, 1816 accepted as Fuligo septica (L.) F.H. Wigg., 1780
• Aethalium muscorum (Alb. & Schwein.) Schwein., 1832 accepted as Fuligo muscorum Alb. & Schwein., 1805
• Aethalium rufum (Pers.) Wallr., 1833 accepted as Fuligo rufa Pers., 1794
• Aethalium septicum (L.) Fr., 1829 accepted as Fuligo septica (L.) F.H. Wigg., 1780
• Amaurochaete atra (Alb. & Schwein.) Rostaf., 1873
• Amaurochaete cribrosa (Fr.) T. Macbr., 1917 accepted as Amaurochaete tubulina (Alb. & Schwein.) T. Macbr., 1922
• Amaurochaete fuliginosa T. Macbr., 1899 accepted as Amaurochaete atra (Alb. & Schwein.) Rostaf., 1873
• Amaurochaete trechispora T. Macbr. & G.W. Martin, 1932
• Amaurochaete tubulina (Alb. & Schwein.) T. Macbr., 1922
• Amiba limax Dujardin
• Amoeba biddulphiae
• Amoeba chaetognathi Grassi
• Amoeba chlorochlamys R. Lauterborn
• Amoeba discoides Sch.
• Amoeba dubia Sch.
• Amoeba flavescens Gruber, 1889 accepted as Gruberella flavescens (Gruber, 1889) Page, 1984
• Amoeba gorgonia Penard, 1902
• Amoeba guttula Duj.
• Amoeba limicola Rhumb.
• Amoeba pigmentifera Grassi
• Amoeba proteus (Pal.)
• Amoeba pulchra Biernacka, 1963 accepted as Thecamoeba pulchra Page, 1977
• Amoeba punctata P.-A. Dangeard
• Amoeba radiosa Ehr.
• Amoeba rotatoria A.F. Mayer
• Amoeba spumosa Grub.
• Amoeba striata Pen.
• Amoeba verrocosa
• Amoeba vespertilio Pen.
• Amphizonella minima Kufferath
• Antarcella atava Collin, 1914
• Antonigeppia conica (Pers.) Kuntze, 1898 accepted as Lycogala conicum Pers., 1801
• Arcella aculeata Ehrenberg, 1832 accepted as Centropyxis aculeata (Ehrenberg, 1832) Stein, 1859
• Arcella arenaria Greeff
• Arcella constricta Ehrenberg, 1841 accepted as Centropyxis constricta (Ehrenberg, 1841) Deflandre, 1929
• Arcella dentata Ehr.
• Arcella discoides Ehr.
• Arcella hemisphaerica Perty, 1852
• Arcella patina Ehrenberg
• Arcella vulgaris Ehrenberg, 1832
• Arcyodes incarnata (Alb. & Schwein.) O.F. Cook, 1902
• Arcyodes luteola (Kowalski) Nann.-Bremek., 1985 accepted as Perichaena luteola (Kowalski) Gilert, 1995
• Arcyrella incarnata (Pers. ex J.F. Gmel.) Racib., 1885 accepted as Arcyria incarnata (Pers.) Pers., 1796
• Arcyrella nutans (Bull.) Racib., 1885 accepted as Arcyria obvelata (Oeder) Onsberg, 1979
• Arcyria abietina (Wigand) Nann.-Bremek., 1985 accepted as Hemitrichia abietina (Wigand) G. Lister, 1911
• Arcyria affinis Rostaf., 1875
• Arcyria afroalpina Rammeloo, 1981
• Arcyria aggregata Yu Li, Shuang L. Chen & H.Z. Li, 1993
• Arcyria albida Pers., 1794 accepted as Arcyria cinerea (Bull.) Pers., 1801
• Arcyria assamica Agnihothr., 1958
• Arcyria aureoglobosa Y. Yamam., 1990
• Arcyria biniensis Ejale & L.S. Gill, 1992
• Arcyria brooksii T.N. Lakh. & Mukerji, 1980
• Arcyria bulbosa S.L. Stephenson & Nann.-Bremek., 1990
• Arcyria carnea (G. Lister) G. Lister, 1921 accepted as Arcyria minuta Buchet, 1928
• Arcyria chrysospora (Lister) Massee, 1892 accepted as Hemitrichia chrysospora (Lister) Lister, 1894
• Arcyria cinerea (Bull.) Pers., 1801
• Arcyria clavata (Pers.) Massee, 1892 accepted as Hemitrichia clavata (Pers.) Rostaf., 1873
• Arcyria colloderma Nann.-Bremek. & S.L. Stephenson, 1990
• Arcyria congestus (Sommerf.) Berk. & Broome, 1876 accepted as Arcyodes incarnata (Alb. & Schwein.) O.F. Cook, 1902
• Arcyria corymbosa M.L. Farr & G.W. Martin, 1958
• Arcyria decipiens Berk., 1842 accepted as Trichia decipiens (Pers.) T. Macbr., 1899
• Arcyria denudata (L.) Wettst., 1886
• Arcyria elaterensis Mulleavy, 1977 accepted as Trichia elaterensis (Mulleavy) Ladó, 1997
• Arcyria exigua Yu Li, Shuang L. Chen & H.Z. Li, 1993
• Arcyria fasciculata Dhillon & Nann.-Bremek., 1978
• Arcyria ferruginea Saut., 1841
• Arcyria flava Pers., 1794 accepted as Arcyria obvelata (Oeder) Onsberg, 1979
• Arcyria flavescens Y. Yamam., 1992
• Arcyria fuegiana Aramb., 1972
• Arcyria fulgens Nann.-Bremek. ined. accepted as Arcyria affinis Rostaf., 1875
• Arcyria gulielmae Nann.-Bremek., 1971 accepted as Arcyria minuta Buchet, 1928
• Arcyria helvetica (Meyl.) H. Neubert, Nowotny & K. Baumann, 1989
• Arcyria incarnata (Pers.) Pers., 1796
• Arcyria insignis Kalchbr. & Cooke, 1882
• Arcyria karstenii (Rostaf.) Massee, 1892 accepted as Trichia contorta (Ditmar) Rostaf., 1875
• Arcyria leiocarpa (Cooke) G.W. Martin & Alexop., 1969 accepted as Hemitrichia leiocarpa (Cooke) Lister, 1894
• Arcyria leucocephala (Pers.) Hoffm., 1795 accepted as Craterium leucocephalum (Pers.) Ditmar, 1813
• Arcyria major (G. Lister) Ing, 1967
• Arcyria marginoundulata Nann.-Bremek. & Y. Yamam., 1983
• Arcyria minuta Buchet, 1928
• Arcyria nepalensis Poelt, 1965