Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Clade neomura Cavalier-Smith, 1987
             Domain Eukaryota Chatton, 1925 - eukaryotes
               Clade discaria Cavalier-Smith, 2021
                 Clade dorsates Cavalier-Smith, 2021
                   Clade podiates Cavalier-Smith, 2012
                     Clade Amorphea Adl et al. 2012 [Simpson, Medina & Adl 2020]
                       Clade Obazoa Brown, Sharpe, Silberman, Heiss, Lang, Simpson & Roger 2013
                         Clade Opisthokonta Cavalier-Smith 1987 [Simpson & Medina 2020] - animal-fungal clade
                           Superkingdom Holomycota Liu, Steenkamp, Brinkmann, Forget, Philippe & Lang, 2009
                             Kingdom Fungi R.T.Moore (1980) - fungi
                               Subkingdom Olpidiomyceta Tedersoo, Sánchez-Ramírez, Kõljalg, Bahram, M. Döring, Schigel, T.W. May, M. Ryberg & Abarenkov (2018) [monotypic]
                                 Phylum Olpidiomycotaᵀ Doweld (2013) [monotypic]
                                   Class Olpidiomycetesᵀ Doweld (2013) [monotypic]
                                     Order Olpidialesᵀ Caval.-Sm. (2012) [monotypic]
                                       Family Olpidiaceaeᵀ J.Schröt. (1886)
                                         1 ?Genus Morella Pérez Reyes (1964), nom. illeg.
                                         2 Genus Chytridhaema Moniez (1887) [monotypic]
                                         3 Genus Cibdelia Juel (1925) [monotypic]
                                         4 Genus Leiolpidium Doweld (2014)
                                         5 Genus Olpidiumᵀ (A.Braun) Rabenh. (1868)