• Achlya ambisexualis Raper, 1939
• Achlya americana Humphrey, 1892
• Achlya apiculata de Bary, 1888
• Achlya aquatica Dayal & J. Thakur, 1969
• Achlya benekei J.S. Furtado, 1965
• Achlya bisexualis Coker & Couch, 1927
• Achlya bispora (Couch) Langsam, 1986
• Achlya brasiliensis A.I. Milanez, 1965
• Achlya caroliniana Coker, 1910
• Achlya colorata Pringsh., 1882
• Achlya conspicua Coker, 1923
• Achlya crenulata Ziegler, 1948
• Achlya debaryana Humphrey, 1893
• Achlya dubia Coker, 1923
• Achlya flagellata Coker, 1923
• Achlya glomerata Coker, 1912
• Achlya heterosexualis Whiffen, 1965
• Achlya hypogyna Coker & Pemberton, 1908
• Achlya imperfecta Coker, 1923
• Achlya intricata Beneke, 1948
• Achlya klebsiana Pieters, 1915
• Achlya lobata Ziegler & Gilpin, 1954
• Achlya megasperma Humphrey, 1892
• Achlya mucronata Ziegler, 1958
• Achlya oblongata de Bary, 1888
• Achlya oligocantha de Bary, 1888
• Achlya orion Coker & Couch, 1920
• Achlya oviparvula A.L. Rogers & Beneke, 1962
• Achlya papillosa Humphrey, 1892
• Achlya polyandra Hildebr., 1867
• Achlya proliferoides Coker, 1923
• Achlya pseudoradiosa A.L. Rogers & Beneke, 1962
• Achlya racemosa Hildebr., 1867
• Achlya radiosa Maurizio, 1899
• Achlya recurva Cornu
• Achlya sparrowii Reischer, 1949
• Achlya spinosa de Bary, 1882
• Achlya treleaseana (Humphrey) Kauffman, 1906
• Achlya turfosa Johannes, 1950
• Aphanomyces astaci Schikora, 1906
• Aphanomyces brassicae S.L. Singh & Pavgi, 1977
• Aphanomyces cladogamus Drechsler, 1929
• Aphanomyces cochlioides Drechsler, 1929
• Aphanomyces euteiches Drechsler, 1925
• Aphanomyces helicoides Minden
• Aphanomyces invadans David & Kirk, 1997
• Aphanomyces invaderis Willoughby, Roberts & Chinabut, 1995 accepted as Aphanomyces invadans David & Kirk, 1997
• Aphanomyces iridis Ichit. & Tak. Kodama, 1986
• Aphanomyces irregularis W.W. Scott, 1961
• Aphanomyces laevis de Bary, 1860
• Aphanomyces parasiticus Coker, 1923
• Aphanomyces piscicida (Hatai, 1980) accepted as Aphanomyces invadans David & Kirk, 1997
• Aphanomyces raphani J.B. Kendr., 1927
• Aphanomyces scaber de Bary, 1860
• Aphanomyces stellatus de Bary, 1860
• Aphanomycopsis bacillariacearum Scherff., 1925
• Aphanomycopsis cryptica Canter, 1984
• Aphanomycopsis desmidiella Canter, 1949
• Aphanomycopsis entophyta (Pringsh.) M.W. Dick, 2001
• Aphanomycopsis peridiniella Boltovskoy & Aramb., 1984
• Aphanomycopsis punctata Karling, 1968
• Aphanomycopsis saprophytica Karling, 1968
• Aphanomycopsis sexualis W.W. Martin, 1975
• Aplanes androgynus (W. Archer) Humphrey, 1893
• Aplanes treleaseanus (Humphrey) Coker, 1923 accepted as Achlya treleaseana (Humphrey) Kauffman, 1906
• Aplanes turfosus (Minden) Coker, 1927 accepted as Saprolegnia turfosa (Minden) Gäum., 1918
• Aplanopsis spinosa M.W. Dick, 1960
• Aplanopsis terrestris Höhnk, 1952
• Apodachlya brachynema (Hildebr.) Pringsh., 1888
• Apodachlya completa Humphrey, 1892 accepted as Apodachlyella completa (Humphrey) Indoh, 1939
• Apodachlya minima Coker & J. Leitn., 1938
• Apodachlya punctata Minden
• Apodachlya pyrifera Zopf, 1888
• Apodachlya seriata A. Lund, 1934
• Apodachlyella completa (Humphrey) Indoh, 1939
• Apodya lactea (C. Agardh) Cornu accepted as Leptomitus lacteus C. Agardh, 1824
• Archilegnia latvica (Apinis) Apinis, 1933 accepted as Saprolegnia latvica Apinis, 1930
• Atkinsiella awabi Kitanch., K. Nakam., S. Wada & Hatai, 1994 accepted as Halodaphnea awabi (Kitanch., K. Nakam., S. Wada & Hatai) M.W. Dick, 1998
• Atkinsiella dubia (D. Atkins) Vishniac, 1958
• Atkinsiella entomophaga W.W. Martin, 1977 accepted as Crypticola entomophaga (W.W. Martin) M.W. Dick, 1998
• Atkinsiella hamanaensis Bian & Egusa, 1980 accepted as Halodaphnea hamanaensis (Bian & Egusa) M.W. Dick, 1998
• Atkinsiella okinawaensis K. Nakam. & Hatai, 1995 accepted as Halodaphnea okinawaensis (K. Nakam. & Hatai) M.W. Dick, 1998
• Atkinsiella panulirata Kitanch. & Hatai, 1995 accepted as Halodaphnea panulirata (Kitanch. & Hatai) M.W. Dick, 1998
• Atkinsiella parasitica K. Nakam. & Hatai, 1994 accepted as Halodaphnea parasitica (K. Nakam. & Hatai) M.W. Dick, 1998
• Blastulidium paedophthorum Pérez, 1903
• Brevilegnia bispora Couch, 1927 accepted as Achlya bispora (Couch) Langsam, 1986
• Brevilegnia gracilis Eek, 1937
• Brevilegnia linearis Coker, 1927
• Brevilegnia macrospora Eek, 1937
• Brevilegnia unisperma (Coker & Braxton) Coker & Braxton, 1927
• Brevilegniella keratinophila M.W. Dick, 1961
• Calyptralegnia achlyoides (Coker & Couch) Coker, 1927
• Calyptralegnia ripariensis Höhnk, 1953
• Chlamydomyzium anomalum (G.L. Barron) M.W. Dick, 1997
• Chlamydomyzium aplanosporum Glockling, 1997
• Chlamydomyzium internum Glockling, 1997
• Chlamydomyzium oviparasiticum (G.L. Barron) M.W. Dick, 1997
• Chlamydomyzium septatum (Karling) M.W. Dick, 1997
• Chlamydomyzium sphaericum Glockling, 2001
• Cladolegnia asterophora (de Bary) Johannes, 1955 accepted as Saprolegnia asterophora de Bary, 1860