Fungal genera: Macbridella [9 taxa], Macbrideola [30 taxa], Macentina [3 taxa], Macowaniella [47 taxa], Macowanites [3 taxa], Macrochytrium [2 taxa], Macrocystidia [4 taxa], Macroderma [2 taxa], Macrodiaporthe [3 taxa], Macrodiplodia [9 taxa], Macrohilum [3 taxa], Macrolepiota [14 taxa], Macrophoma [408 taxa], Macrophomina [572 taxa], Macrophomopsis [1 taxon], Macrophyllosticta [1 taxon], Macropodia [6 taxa], Macrospora [8 taxa], Macrosporium [161 taxa], Macrotyphula [7 taxa], Macrovalsaria [3 taxa], Madurella [5 taxa], Magdalaenaea [2 taxa], Magnaporthe [171 taxa], Magnusiella [5 taxa], Mahabalella [8 taxa], Mainsia [56 taxa], Maireella [2 taxa], Malacaria [4 taxa], Malajczukia [14 taxa], Malassezia [3 taxa], Malbranchea [4 taxa], Malustela [2 taxa], Mamiania [93 taxa], Mamianiella [18 taxa], Mammaria [2 taxa], Mammariopsis [2 taxa], Manaustrum [4 taxa], Manginella [2 taxa], Manginula [1 taxon], Mapletonia [2 taxa], Marasmiellus [421 taxa], Marasmius [1256 taxa], Maravalia [67 taxa], Marcelleina [2 taxa], Marceloa [3 taxa], Marchandiomyces [4 taxa], Margarita [2 taxa], Margaritispora [1 taxon], Mariannaea [16 taxa], Maronea [16 taxa], Marssonia [1 taxon], Marssonina [148 taxa], Martellia [2 taxa], Marthamyces [191 taxa], Martinella [1 taxon], Martininia [16 taxa], Masoniella [5 taxa], Masoniomyces [8 taxa], Massalongia [2 taxa], Massaria [94 taxa], Massariella [7 taxa], Massarina [137 taxa], Massarinula [4 taxa], Massariosphaeria [18 taxa], Massariothea [2 taxa], Massariovalsa [3 taxa], Masseeëlla [21 taxa], Massospora [8 taxa], Mastigosporella [2 taxa], Mastigosporium [11 taxa], Mastomyces [1 taxon], Matsushimaea [5 taxa], Matsushimomyces [5 taxa], Matula [1 taxon], Maublancia [5 taxa], Mauginiella [6 taxa], Maurodothina [6 taxa], Mazosia [273 taxa], Mazzantia [9 taxa], Medusosphaera [1 taxon], Medusulina [2 taxa], Megacapitula [1 taxon], Megacollybia [28 taxa], Megalaria [3 taxa], Megaloblastenia [6 taxa], Megalocystidium [23 taxa], Megalodochium [6 taxa], Megalonectria [1 taxon], Megaloseptoria [1 taxon], Megalospora [104 taxa], Megalotremis [2 taxa], Megaloxyphium [10 taxa], Megaspora [12 taxa], Megasporoporia [10 taxa], Megaster [6 taxa], Megatrichophyton [1 taxon], Mehtamyces [1 taxon], Meiorganum [1 taxon], Melampsora [1179 taxa], Melampsorella [25 taxa], Melampsoridium [136 taxa], Melampylidium [1 taxon], Melanamphora [6 taxa], Melanconiella [3 taxa], Melanconiopsis [6 taxa], Melanconis [242 taxa], Melanconium [203 taxa], Melanelia [198 taxa], Melanelixia [16 taxa], Melanocarpus [1 taxon], Melanocephala [25 taxa], Melanochaeta [10 taxa], Melanochlamys [2 taxa], Melanogaster [4 taxa], Melanographium [82 taxa], Melanohalea [28 taxa], Melanoleuca [10 taxa], Melanomma [108 taxa], Melanomphalia [5 taxa], Melanomyces [1 taxon], Melanophyllum [9 taxa], Melanoporella [3 taxa], Melanoporia [2 taxa], Melanops [11 taxa], Melanopsamma [21 taxa], Melanopsichium [30 taxa], Melanospora [157 taxa], Melanosporella [1 taxon], Melanotaenium [35 taxa], Melanotheca [14 taxa], Melanotrema [8 taxa], Melanotus [25 taxa], Melasmia [29 taxa], Melaspilea [64 taxa], Melastiza [4 taxa], Melchioria [2 taxa], Meliola [9349 taxa], Meliolina [30 taxa], Melioliphila [30 taxa], Meliolopsis [3 taxa], Melittosporiella [4 taxa], Melittosporium [10 taxa], Mellitiosporium [5 taxa], Meloderma [215 taxa], Melogramma [65 taxa], Melomastia [37 taxa], Melophia [6 taxa], Memnoniella [168 taxa], Mendoziopeltis [2 taxa], Menegazzia [33 taxa], Menidochium [3 taxa], Menispora [15 taxa], Menisporella [2 taxa], Menisporopsis [91 taxa], Mercadomyces [4 taxa], Meria [9 taxa], Meripilus [10 taxa], Merismella [3 taxa], Merismodes [2 taxa], Meristacrum [1 taxon], Merostictis [10 taxa], Meruliopsis [156 taxa], Meruliporia [2 taxa], Merulius [11 taxa], Merulius [52 taxa], Mesniera [2 taxa], Mesobotrys [2 taxa], Mesophellia [9 taxa], Metabotryon [1 taxon], Metacapnodium [17 taxa], Metacoleroa [3 taxa], Metadiplodia [76 taxa], Metameris [2 taxa], Metarhizium [117 taxa], Metasphaeria [119 taxa], Metathyriella [1 taxon], Metatrichia [107 taxa], Metazythia [1 taxon], Metschnikowia [1 taxon], Metulodontia [3 taxa], Metus [1 taxon], Meyerozyma [2 taxa], Micarea [52 taxa], Micraspis [64 taxa], Microascus [26 taxa], Microbacidia [1 taxon], Microbotryodiplodia [1 taxon], Microbotryum [3 taxa], Microcalicium [3 taxa], Microcalliopsis [7 taxa], Microcallis [14 taxa], Microcera [1 taxon], Microclava [10 taxa], Microcyclus [34 taxa], Microdiplodia [7 taxa], Microdiplodia [715 taxa], Microdiscula [2 taxa], Microdochium [127 taxa], Microdothella [2 taxa], Microglaena [8 taxa], Microglossum [5 taxa], Micrographina [2 taxa], Micromphale [44 taxa], Micromucor [11 taxa], Micronectria [1 taxon], Micronectriella [4 taxa], Micropeltella [36 taxa], Micropeltidium [54 taxa], Micropeltis [558 taxa], Micropeltopsis [50 taxa], Micropera [15 taxa], Micropeziza [7 taxa], Microphyma [1 taxon], Micropodia [4 taxa], Microporellus [32 taxa], Microporus [8 taxa], Micropsalliota [3 taxa], Micropuccinia [106 taxa], Micropustulomyces [2 taxa], Microscypha [4 taxa], Microsphaera [2918 taxa], Microsphaeropsis [293 taxa], Microspora [2 taxa], Microsporum [22 taxa], Microstoma [13 taxa], Microstroma [86 taxa], Microthecium [2 taxa], Microthelia [16 taxa], Microthyriella [49 taxa], Microthyrina [4 taxa], Microthyriolum [2 taxa], Microthyrium [194 taxa], Microxiphium [109 taxa], Microxyphiella [24 taxa], Microxyphiomyces [36 taxa], Microxyphiopsis [8 taxa], Microxyphium [200 taxa], Midotiopsis [4 taxa], Midotis [4 taxa], Mikronegeria [57 taxa], Miladina [2 taxa], Milesia [34 taxa], Milesina [51 taxa], Millerozyma [2 taxa], Mindoa [4 taxa], Minimidochium [4 taxa], Minksia [1 taxon], Minutoexcipula [1 taxon], Mirandia [1 taxon], Mirandina [11 taxa], Miratio [1 taxon], Misgomyces [2 taxa], Mitopeltis [1 taxon], Mitrula [19 taxa], Mitrulinia [15 taxa], Mitteriella [14 taxa], Miyagia [17 taxa], Mniaecia [5 taxa], Mniopetalum [1 taxon], Moelleriella [3 taxa], Moellerodiscus [77 taxa], Moesziomyces [92 taxa], Moeszopeltis [1 taxon], Molleriella [1 taxon], Mollisia [449 taxa], Mollisiella [1 taxon], Mollisina [9 taxa], Mollisiopsis [4 taxa], Monacrosporium [34 taxa], Monascostroma [4 taxa], Monascus [12 taxa], Monilia [58 taxa], Monilia [3 taxa], Monilinia [380 taxa], Moniliopsis [10 taxa], Monilochaetes [2 taxa], Monoblastia [6 taxa], Monoblepharella [5 taxa], Monoblepharis [1 taxon], Monochaetia [95 taxa], Monochaetiella [12 taxa], Monochaetiellopsis [3 taxa], Monochaetinula [1 taxon], Monochaetopsis [1 taxon], Monocillium [13 taxa], Monodia [1 taxon], Monodictys [154 taxa], Monodisma [11 taxa], Monodorus [1 taxon], Monographella [54 taxa], Monographos [1 taxon], Monoicomyces [5 taxa], Monopodium [1 taxon], Monospermella [1 taxon], Monosporascus [3 taxa], Monosporidium [6 taxa], Monosporium [13 taxa], Monostichella [8 taxa], Monotospora [7 taxa], Monotosporella [4 taxa], Monotrichum [2 taxa], Montagnea [1 taxon], Montagnella [33 taxa], Montagnula [10 taxa], Moorella [5 taxa], Morchella [39 taxa], Morenoella [86 taxa], Morenoina [26 taxa], Morfea [12 taxa], Morfea [11 taxa], Morganella [19 taxa], Moristroma [2 taxa], Morrisiella [1 taxon], Morrisographium [3 taxa], Morthiera [2 taxa], Mortierella [92 taxa], Mucedo [1 taxon], Muchmoria [1 taxon], Mucilago [37 taxa], Muciturbo [6 taxa], Mucomassaria [1 taxon], Mucor [490 taxa], Mucor [19 taxa], Mucronella [26 taxa], Mucronoporus [1 taxon], Muellerites [3 taxa], Muelleromyces [1 taxon], Multiclavula [2 taxa], Mundkurella [2 taxa], Munkiella [11 taxa], Munkiodothis [2 taxa], Muribasidiospora [4 taxa], Muricopeltis [1 taxon], Muricularia [4 taxa], Murogenella [5 taxa], Murrilloporus [1 taxon], Muscia [2 taxa], Mutinus [19 taxa], Muyocopron [3 taxa], Myceliophthora [8 taxa], Mycena [1257 taxa], Mycenella [3 taxa], Mycerema [2 taxa], Mycoacia [19 taxa], Mycoamaranthus [1 taxon], Mycoarachis [1 taxon], Mycobilimbia [48 taxa], Mycoblastus [13 taxa], Mycobonia [33 taxa], Mycocalia [4 taxa], Mycocalicium [20 taxa], Mycocentrospora [26 taxa], Mycociferria [1 taxon], Mycocitrus [1 taxon], Mycoenterolobium [43 taxa], Mycofalcella [2 taxa], Mycoglaena [3 taxa], Mycogloea [1 taxon], Mycogone [9 taxa], Mycohypallage [3 taxa], Mycolangloisia [4 taxa], Mycoleptodiscus [38 taxa], Mycoleptodon [24 taxa], Mycoleptodonoides [2 taxa], Mycomicrothelia [16 taxa], Mycopappus [5 taxa], Mycopara [1 taxon], Mycopepon [8 taxa], Mycophaga [3 taxa], Mycoporellum [2 taxa], Mycoporum [10 taxa], Mycorhynchus [2 taxa], Mycorrhaphium [3 taxa], Mycosphaerella [3817 taxa], Mycostevensonia [10 taxa], Mycosyrinx [35 taxa], Mycothyridium [5 taxa], Mycotoruloides [1 taxon], Mycotribulus [15 taxa], Mycotypha [1 taxon], Mycovellosiella [270 taxa], Mycowinteria [3 taxa], Myelochroa [24 taxa], Myelosperma [1 taxon], Myiocopron [45 taxa], Myriangiella [18 taxa], Myriangina [2 taxa], Myrianginella [1 taxon], Myriangium [85 taxa], Myriellina [9 taxa], Myriococcum [2 taxa], Myrioconium [4 taxa], Myriogenospora [67 taxa], Myriophacidium [4 taxa], Myriophysa [1 taxon], Myriosclerotinia [24 taxa], Myriostoma [29 taxa], Myriotrema [101 taxa], Myrmaecium [17 taxa], Myrothecium [424 taxa], Mysia [35 taxa], Mystrosporiella [5 taxa], Mystrosporium [10 taxa], Mytilidion [18 taxa], Mytilinidion [44 taxa], Myxarium [9 taxa], Myxocyclus [1 taxon], Myxofusicoccum [25 taxa], Myxomycidium [8 taxa], Myxormia [1 taxon], Myxosporella [2 taxa], Myxosporium [63 taxa], Myxostomellina [1 taxon], Myxothyriopsis [1 taxon], Myxothyrium [3 taxa], Myxotrichum [22 taxa], Myxozyma [1 taxon], Myzocytiopsis [7 taxa], Myzocytium [9 taxa]