eukaryotes see Domain Eukaryota Chatton, 1925
   Kingdom Fungi R.T.Moore (1980) - fungi
     Subkingdom Eomycota Caval.-Sm. (1998) see Kingdom Fungi R.T.Moore (1980)
       Phylum Archemycota Caval.-Sm. (1998) [paraphyletic]
         Subphylum Melanomycotina Caval.-Sm. (1998) [paraphyletic]
           Infraphylum Zygomycotina Caval.-Sm. (1998) [paraphyletic]
             Class Zoomycetes Caval.-Sm. (1998)
               Subclass Bolomycetidae Caval.-Sm. (2012)
                 Order Olpidiales Caval.-Sm. (2012) [monotypic]
                   Family Olpidiaceae J.Schröt. (1886) [monotypic]
                     Genus Olpidium (A.Braun) Rabenh. (1868)