Kingdom Fungi R.T.Moore (1980) - fungi
   Phylum Rozellomycota Doweld (2013)
     Class Microsporidea Corliss & Levine, 1963
       01 Order Chytridiopsida Weiser, 1974
       02 Order Dissociodihaplophasida Sprague, Becnel & Hazard, 1992
       03 Order Glugeida Issi, 1986
       04 Order Meiodihaplophasida Sprague, Becnel & Hazard, 1992
       05 Family Areosporiidae Stentiford, Bateman, Feist, Oyarzún, Uribe, Palacios & Stone, 2014, incertae sedis [monotypic]
       06 Family Berwaldiidae Simakova, Tokarev & Issi, 2018, incertae sedis
       07 Family Cougourdellidae Poisson, 1953, incertae sedis [monotypic]
       08 Family Facilisporidae Jones, Prosperi-Porta & Kim, 2012, incertae sedis [monotypic]
       09 Family Heterovesiculidae Lange, MacVean, Henry & Streett, 1995, incertae sedis [monotypic]
       10 Family Myosporidae Stentiford, Bateman, Small, Moss, Shields, Reece & Tuck, 2010, incertae sedis [monotypic]
       11 Family Neonosemoidiidae Faye, Toguebaye & Bouix, 1996, incertae sedis [monotypic]
       12 Family Ordosporidae Larsson, Ebert & Vávra, 1997, incertae sedis [monotypic]
       13 Family Pleistosporidiidae Codreanu-Bălcescu & Codreanu, incertae sedis [monotypic]
       14 Family Neopereziidae Voronin, 2001, incertae sedis
       15 Family Telomyxidae Léger & Hesse, 1910, incertae sedis [monotypic]
       16 Family Toxoglugeidae sensu Wijayawardene et al., 2018, incertae sedis [monotypic]
       17 Family Tubulinosematidae Franzen, Fischer, Schroeder, Schölmerich & Schneuwly, 2005, incertae sedis
       18 Genus Alfvenia Larsson, 1983, incertae sedis
       19 Genus Anisofilariata Tokarev, Voronin, Seliverstova, Dolgikh, Pavlova, Ignatieva & Issi, 2010, incertae sedis [monotypic]
       20 Genus Auraspora Weiser & Purrini, 1980, incertae sedis [monotypic]
       21 Genus Baculea Loubès & Akbarieh, 1978, incertae sedis [monotypic]
       22 Genus Campanulospora Issi, Radishcheva & Dolzhenko, 1983, incertae sedis [monotypic]
       23 Genus Caulleryetta Dogiel, 1922, incertae sedis [monotypic]
       24 Genus Chytridioides Trégouboff, 1913, incertae sedis [monotypic]
       25 Genus Ciliatosporidium Foissner & Foissner, 1995, incertae sedis [monotypic]
       26 Genus Crispospora Tokarev, Voronin, Seliverstova, Pavlova & Issi, 2010, incertae sedis [monotypic]
       27 Genus Cryptosporina Hazard & Oldacre, 1975, incertae sedis [monotypic]
       28 Genus Cystosporogenes Canning, Barker, Nicholas & Page, 1985, incertae sedis
       29 Genus Endoreticulatus Brooks, Becnel & Kennedy, 1988, incertae sedis
       30 Genus Enterocytospora Rode, Landes, Lievens, Flaven, Segard, Jabbour-Zahab, Michalakis, Agnew, Vivarés & Lenormand, 2013, incertae sedis [monotypic]
       31 Genus Evlachovaia Voronin & Issi, 1986, incertae sedis [monotypic]
       32 Genus Geusia Rühl & Korn, 1979, incertae sedis [monotypic]
       33 Genus Globulispora Vávra, Hyliš, Fiala & Nebesářová, 2016, incertae sedis [monotypic]
       34 Genus Glugoides Larsson, Ebert, Vávra & Voronin, 1996, incertae sedis [monotypic]
       35 Genus Gurleyides Voronin, 1986, incertae sedis [monotypic]
       36 Genus Hamiltosporidium Haag, Larsson, Refardt & Ebert, 2011, incertae sedis
       37 Genus Hazardia Weiser, 1977, incertae sedis
       38 Genus Hirsutosporos Batson, 1983, incertae sedis [monotypic]
       39 Genus Holobispora Voronin, 1986, incertae sedis [monotypic]
       40 Genus Issia Weiser, 1977, incertae sedis
       41 Genus Janacekia Larsson, 1983, incertae sedis
       42 Genus Kinorhynchospora Adrianov & Rybakov, 1991, incertae sedis [monotypic]
       43 Genus Liebermannia Sokolova, Lange & Fuxa, 2006, incertae sedis
       44 Genus Mariona Stempell, 1909, incertae sedis [monotypic]
       45 Genus Merocinta Pell & Canning, 1993, incertae sedis [monotypic]
       46 Genus Microsporidium Balbiani, 1884, incertae sedis
       47 Genus Multilamina Becnel, Scheffrahn, Vossbrinck & Bahder, 2013, incertae sedis [monotypic]
       48 Genus Myxocystis Mrázek, 1897, incertae sedis [monotypic]
       49 Genus Nematocenator Sapir, Dillman, Connon, Grupe, Ingels, Mundo-Ocampo, Levin, Bladwin, Orphan & Sternberg, 2014, incertae sedis [monotypic]
       50 Genus Nematocida Troemel, Félix, Whiteman, Barrière & Ausubel, 2008, incertae sedis [monotypic]
       51 Genus Nosemoides Vinckier, 1975, incertae sedis
       52 Genus Orthosomella Canning, Wigley & Barker, 1991, incertae sedis
       53 Genus Sheriffia Larsson, 2014, incertae sedis [monotypic]
       54 Genus Spiroglugea Léger & Hesse, 1924, incertae sedis [monotypic]
       55 Genus Sporanauta Ardila-Garcia & Fast, 2012, incertae sedis [monotypic]
       56 Genus Stempellia Léger & Hesse, 1910, incertae sedis
       57 Genus Systenostrema Hazard & Oldacre, 1975, incertae sedis
       58 Genus Takaokaspora Andreadis, Takaoka, Otsuka & Vossbrinck, 2013, incertae sedis [monotypic]
       59 Genus Trichotuzetia Vávra, Larsson & Baker, 1997, incertae sedis [monotypic]
       60 Genus Triwangia Nai, Hsu & Lo, 2013, incertae sedis [monotypic]
       61 Genus Vittaforma Silveira & Canning, 1995, incertae sedis [monotypic]
       62 Genus Wittmannia Czaker, 1997, incertae sedis [monotypic]