• (1) Maasoglossum verrucosporum - Macrophoma seriata
• (2) Macrophoma sesami - Marasmiellus contrarius
• (3) Marasmiellus corticigenus - Marasmius haematocephalus var. pseudotageticolor
• (4) Marasmius haematodes - Marasmius viridifuscus
• (5) Marasmius viticola - Massarina japonica
• (6) Massarina lacustris - Melampsora gelmii
• (7) Melampsora geniculata - Melanoleuca cinereifolia
• (8) Melanoleuca cinerescens - Melasmia setariae
• (9) Melasmia ulmicola - Meliola jatrophae
• (10) Meliola juddiana - Melophia nigrimacula
• (11) Melophia nitens - Metameris osmundicola
• (12) Metapezizella phyllachorivora - Microascus intermedius
• (13) Microascus longirostris - Micropera sorbi
• (14) Micropera stellata - Microthelia donacina
• (15) Microthelia dotyi - Mitrula crispata
• (16) Mitrula cucullata - Monascostroma innumerosum
• (17) Monascus anka var. rubellus - Monosporium sclerotiale
• (18) Monosporium sepedonioides - Mucor amphibiorum
• (19) Mucor angarensis - Muscicola dubia
• (20) Muscodor albus - Mycena luteoalba
• (21) Mycena luteoalcalina - Mycobilimbia quaternella
• (22) Mycobilimbia subfuscae - Mycosphaerella caryophylli
• (23) Mycosphaerella cassiae - Mycosphaerella scirpi-lacustris
• (24) Mycosphaerella scirrhoides - Myrmaecium cinctum
• (25) Myrmaecium durissimum - Myzocytium zoophthorum