 Natura - nature |
| Mundus Plinius - physical world |
| Naturalia - natural bodies |
| Biota |
| Domain Eukaryota Chatton, 1925 - eukaryotes |
| Unikonta |
| Opisthokonta Cavalier-Smith, 1987 |
| Holomycota |
| Kingdom Fungi T.L. Jahn & F.F. Jahn, 1949 ex R.T. Moore, 1980 - fungi |
 Phylum Microsporidia (Balbiani, 1882) Weiser, 1977 |
 Genus Abelspora C. Azevedo, 1987 |
| Genus Agglomerata Larsson & Yan, 1988 |
| Genus Alloglugea Paperna & Lainson, 1995 |
| Genus Anncaliia I.V. Issi et al., 1993 |
| Genus Auraspora Weiser & Purrini, 1980 |
| Genus Bacillidium Janda, 1928 |
| Genus Brachiola A. Cali, P.M. Takvorian, S. Lewin, M. Rendel, C.S. Sian, M. Wittner, H.B. Tanowitz, E. Keohane & L. Weiss, 1998 |
| Genus Campanulospora Issi et al., 1983 |
| Genus Canningia Weiser, Wegensteiner & Zizka, 1995 |
| Genus Cylindrospora Issi & Voronin, 1986 |
 ?Order Cylindrosporida |
| Genus Cystosporogenes E.U. Canning, R.J. Barker, J.P. Nicholas & A.M. Page, 1985a |
| Genus Desportesia Issi & Voronin, 1986 |
| Genus Evlachovaia Voronin & Issi, 1986 |
| Genus Flabelliforma E.U. Canning, R. Killick-Kendrick & M. Killick-Kendrick, 1991 |
| Genus Geusia Rühl & Korn, 1979 |
| Genus Glugoides Larsson et al., 1996 |
| Genus Gurleyides Voronin, 1986 |
| Genus Holobispora Voronin, 1986 |
| Genus Hrabeyia Lom & Dykova, 1990 |
| Genus Intexta Larsson, Steiner & Bjornson, 1997 |
| Genus Kinorhynchospora A.V. Adrianov & A.V. Rybakov, 1991 |
| Genus Lanatospora Voronin, 1986 |
| Genus Larssonia Vidtmann & Sokolova, 1994 |
| Genus Larssoniella Weiser & David, 1997 |
| Genus Merocinta Pell & Canning, 1993 |
| Genus Microfilum N. Faye, B.S. Toguebaye & G. Bouix, 1991 |
| Genus Nadelspora Olson, Tiekotter & Reno, 1994 |
| Genus Napamichum Larsson, 1990 |
| Genus Neonosemoides N. Faye & B.S. Togubaye, 1996 |
| Genus Nudispora Larsson, 1990 |
| Genus Octotetraspora Issi, Kadyrova, Pushkar, Khodzhaeva & Krylova, 1990 |
| Genus Ordospora J.I.R. Larsson et al., 1997 |
| Genus Parapleistophora Issi et al., 1990 |
| Genus Parastempellia Khodzhaeva, 1988 |
| Genus Polydispyrenia Canning & Hazard, 1982 |
| Genus Pulicispora Vedmed et al., 1991 |
| Genus Rectispora Larsson, 1990 |
| Genus Resiomeria Larsson, 1986 |
| Genus Semenovaia Voronin & Issi, 1986 |
| Genus Simuliospora Khodzhaeva et al., 1990 |
| Genus Striatospora Issi & Voronin, 1986 |
| Genus Tabanispora H.I. Bykova et al., 1987 |
| Genus Tardivesicula Larsson & Bylén, 1992 |
| Genus Toxospora Voronin, 1993, nom. praeocc. |
| Genus Trachipleistophora W.S. Hollister et al., 1996 |
| Genus Trichoctosporea Larsson, 1994 |
| Genus Trichotuzetia Vávra et al., 1997 |
| Genus Tricornia Pell & Canning, 1992 |
| Genus Vittaforma Silveira & Canning, 1994 |
| Class Minisporea Cavalier-Smith, 1993 |
| Class Microsporea Levine & Corliss, 1963 |
| Class Metchnikovellea Weiser, 1977 |