Kingdom Fungi R.T.Moore (1980) - fungi
   Phylum Olpidiomycota Doweld (2013) [monotypic]
     Class Olpidiomycetes Doweld (2013) [monotypic]
       Order Olpidiales Caval.-Sm. (2012) [monotypic]
         Family Olpidiaceae J.Schröt. (1886)
           1 Genus Chytridhaema Moniez (1887) [monotypic]
           2 Genus Cibdelia Juel (1925) [monotypic]
           3 Genus Leiolpidium Doweld (2014)
           4 Genus Olpidium (A.Braun) Rabenh. (1868)