• Didymella Saccardo, 1880
• Didymella aerospora Punith., 1981
• Didymella aggregata (Lasch) Sacc. accepted as Leptosphaeria aggregata (Lasch) O.E. Erikss., 1992
• Didymella analepta (Ach.) Sacc., 1882 accepted as Arthopyrenia analepta (Ach.) A. Massal., 1852
• Didymella anomala (Ellis & Everh.) Shoemaker & C.E. Babc., 1987 accepted as Didymolepta anomala (Ellis & Everh.) M.E. Barr, 1993
• Didymella antecellens (Nyl.) Vain., 1921 accepted as Mycoporum antecellens (Nyl.) R.C. Harris, 1995
• Didymella applanata (Niessl) Sacc., 1882
• Didymella arachidicola (Khokhr.) Tomilin, 1979 accepted as Didymosphaeria arachidicola (Khokhr.) Alcorn, Punith. & MacCarthy, 1976
• Didymella arcuata Röder, 1939 accepted as Septoria cannabis (Lasch) Sacc., 1884
• Didymella astragalina (Rehm) Corbaz, 1957 accepted as Stigmatula astragali (Lasch) P.F. Cannon, 1996
• Didymella atomaria (Ach.) Szatala, 1930 accepted as Leptorhaphis atomaria (Ach.) Szatala, 1928
• Didymella avicenniae S.D. Patil & Borse, 1985
• Didymella bryoniae (Fuckel) Rehm, 1881
• Didymella bryospila (Nyl.) H. Magn., 1937 accepted as Pyrenocollema bryospilum (Nyl.) Coppins, 1992
• Didymella cannabis (G. Winter) Arx, 1962 accepted as Mycosphaerella cannabis (G. Winter) Röder, 1937
• Didymella caricis Syd., 1921
• Didymella caudata E. Müll., 1952 accepted as Keissleriella caudata (E. Müll.) Corbaz, 1957
• Didymella caulicola (Moug.) Sacc., 1882
• Didymella cerastii Gucevic, 1967
• Didymella chrysanthemi (Tassi) Garib. & Gullino, 1971 accepted as Mycosphaerella chrysanthemi (Tassi) Tomilin, 1979
• Didymella chrysanthemi sensu auct. accepted as Didymella ligulicola (K.F. Baker, Dimock & L.H. Davis) Arx, 1962
• Didymella cinchonae (Ach.) Vain., 1909 accepted as Arthopyrenia cinchonae (Ach.) Müll. Arg., 1883
• Didymella cinereopruinosa (Schaer.) Szatala, 1932 accepted as Arthopyrenia cinereopruinosa (Schaer.) A. Massal., 1855
• Didymella cladophila (Niessl) Sacc., 1882 accepted as Keissleriella cladophila (Niessl) Corbaz, 1957
• Didymella coarctatae de Lesd., 1907 accepted as Lichenochora coarctatae (de Lesd.) Hafellner & F. Berger, 2000
• Didymella collematum (Stein) Vouaux, 1913 accepted as Didymellopsis collematum (J. Steiner) Grube & Hafellner, 1990
• Didymella commanipula (Berk. & Broome) Sacc., 1882
• Didymella corni (Sowerby) Sacc., 1882 accepted as Pseudomassaria corni (Sowerby) Arx, 1952
• Didymella cortaderiae Grove, 1922
• Didymella effusa (Niessl) Sacc., 1882 accepted as Didymella bryoniae (Fuckel) Rehm, 1881
• Didymella epilobii (Fuckel) Sacc., 1882 accepted as Diaporthe epilobii Fuckel
• Didymella epipolytropa (Mudd) Berl. & Voglino, 1886 accepted as Cercidospora epipolytropa Arnold, 1874
• Didymella eupyrena Sacc., 1880
• Didymella exigua (Niessl) Sacc., 1882
• Didymella exitialis (Morini) E. Müll., 1952 accepted as Ascochyta sorghi Sacc., 1875
• Didymella fabae G.J. Jellis & Punith., 1991 accepted as Ascochyta lentis Vassiljevsky, 1940
• Didymella fallax (Nyl.) Vain., 1899 accepted as Arthopyrenia analepta (Ach.) A. Massal., 1852
• Didymella fenestrata (Berk. & Broome) G. Winter accepted as Fenestella fenestrata (Berk. & Broome) J. Schröt., 1897
• Didymella fraxini (A. Massal.) Szatala, 1938 accepted as Arthopyrenia fraxini A. Massal., 1852
• Didymella fucicola (G.K. Sutherl.) Kohlm., 1968
• Didymella genistae (Fuckel) Rehm, 1908 accepted as Keissleriella genistae (Fuckel) E. Müll., 1962
• Didymella glacialis Rehm, 1882
• Didymella gloiopeltidis (Miyabe & Tokida) Kohlm. & E. Kohlm., 1979
• Didymella graminicola Punith., 1970
• Didymella haematites (Roberge ex Desm.) Sacc. accepted as Leptosphaeria haematites (Roberge ex Desm.) Niessl, 1883
• Didymella hebridensis Dennis, 1975
• Didymella holci (Tehon) Arx, 1987 accepted as Mycosphaerella holci Tehon, 1937
• Didymella holosteae Syd., 1924
• Didymella hyphenis (Cooke) Sacc., 1881
• Didymella hyporrhodia Sacc., 1881
• Didymella immunda (Fuckel) Höhn., 1918 accepted as Leiosphaerella succinea (Roberge ex Desm.) E. Müll., 1962
• Didymella ligulicola (K.F. Baker, Dimock & L.H. Davis) Arx, 1962
• Didymella limbalis (Pers.) M. Morelet, 1969 accepted as Mycosphaerella buxicola (DC.) Tomilin, 1970
• Didymella lophospora (Sacc. & Speg.) Sacc., 1882
• Didymella lycopersici Kleb., 1921
• Didymella magnei Feldmann, 1958
• Didymella melonis Pass., 1891 accepted as Didymella bryoniae (Fuckel) Rehm, 1881
• Didymella muehlenbergiae (Ellis) M.E. Barr, 1992 accepted as Phyllachora muehlenbergiae (Ellis) Sacc., 1883
• Didymella nigrella (Fr.) Sacc., 1883
• Didymella operosa (Desm.) Sacc., 1882
• Didymella pachyspora E. Bommer, M. Rousseau & Sacc., 1891
• Didymella pandanicola Syd. & P. Syd., 1914 accepted as Oxydothis pandanicola (Syd. & P. Syd.) Petr., 1952
• Didymella perigena (Nyl.) Sacc. & D. Sacc., 1905 accepted as Didymellopsis perigena (Nyl.) Grube & Hafellner, 1990
• Didymella phacae Corbaz, 1955
• Didymella phacidiomorpha (Ces.) Sacc., 1882 accepted as Glomerella phacidiomorpha (Ces.) Petr., 1927
• Didymella phleina Punith. & Årsvoll, 1979
• Didymella pinodes (Berk. & A. Bloxam) Petr., 1924 accepted as Mycosphaerella pinodes (Berk. & A. Bloxam) Vestergr., 1912
• Didymella planiuscula (Berk. & Broome) Sacc., 1882
• Didymella prominula (Speg.) Piroz. & Morgan-Jones, 1968
• Didymella proximella (P. Karst.) Sacc., 1882
• Didymella pulposi (Zopf) Vouaux, 1913 accepted as Didymellopsis pulposi (Zopf) Grube & Hafellner, 1990
• Didymella punctiformis (Massee) Vain., 1921 accepted as Arthopyrenia punctiformis A. Massal., 1852
• Didymella purpurea F. Lamb. & Fautrey, 1896
• Didymella pyrenastrella (Nyl.) Vain., 1921 accepted as Arthopyrenia punctiformis A. Massal., 1852
• Didymella rabiei (Kovatsch.) Arx, 1962 accepted as Mycosphaerella rabiei Kovatsch., 1936
• Didymella refracta (Cooke) Sacc., 1882 accepted as Didymella proximella (P. Karst.) Sacc., 1882
• Didymella rubitingens (A. Bloxam) Cooke, 1892
• Didymella salicis Grove, 1886
• Didymella scotica Dennis, 1971
• Didymella sepincoliformis (De Not.) Sacc., 1882 accepted as Pseudomassaria sepincoliformis (De Not.) Arx, 1952
• Didymella sphinctrinoides (Zwackh) Berl. & Voglino, 1886 accepted as Zwackhiomyces sphinctrinoides (Zwackh) Grube & Hafellner, 1990
• Didymella stigmatella (Ach.) Szatala, 1938 accepted as Strigula stigmatella (Ach.) R.C. Harris, 1980
• Didymella strobiligena (Desm.) Sacc., 1882 accepted as Delphinella strobiligena (Desm.) Sacc. ex E. Müll. & Arx, 1962
• Didymella submicans (Nyl.) H. Magn., 1937 accepted as Arthopyrenia nitescens (Salwey) Mudd, 1861
• Didymella superflua (Fuckel) Sacc., 1882 accepted as Mycosphaerella superflua (Auersw.) Petr., 1940
• Didymella taiwanensis (W.Y. Yen & C.C. Chi) Shoemaker & C.E. Babc., 1989 accepted as Saccharicola taiwanensis (W.Y. Yen & C.C. Chi) O.E. Erikss. & D. Hawksw., 2003
• Didymella tosta (Berk. & Broome) Sacc., 1882 accepted as Discostroma tostum (Berk. & Broome) Brockmann, 1976
• Didymella trifolii (Fuckel) Sacc., 1895
• Didymella ulothii (Körb.) Berl. & Voglino accepted as Cercidospora ulothii Körb., 1865
• Didymella urticicola Aa & Boerema, 1976
• Didymella vexata Sacc., 1880 accepted as Leiosphaerella vexata (Sacc.) E. Müll., 1962
• Didymella vincetoxici (De Not.) Sacc., 1882
• Didymella vitalbina Petr., 1940
• Didymella weilli Werner, 1937 accepted as Lichenochora weillii (Werner) Hafellner & R. Sant.
• Didymella zeae-maydis (Mukunya & Boothr.) Arx, 1987 accepted as Mycosphaerella zeae-maydis Mukunya & Boothr., 1973
• Didymellaceae J. de Gruyter, M.M. Aveskamp & G.J.M. Verkley, 2009