Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           "neomura" Cavalier-Smith 1987
             Domain Eukaryota Chatton, 1925 - eukaryotes
               neokaryotes Cavalier-Smith 1993 - mitochondrial eukaryotes
                 neozoa Cavalier-Smith 1993
                   Superkingdom Corticata Lankester, 1878
                     Kingdom Chromista Caval.-Sm. (1981) - chromists
                       Subkingdom Harosa Cavalier-Smith, 2010
                         Infrakingdom Halvaria Cavalier-Smith, 2010
                           Superphylum Heterokonta Caval.-Sm. (1981)
                             Phylum Oomycota Arx (1967)
                               Class Peronosporea
                                 Subclass Peronosporidaeᵀ
                                   Order Peronosporalesᵀ
                                     1 Genus †Peronosporoides E.W. Berry (1916), incertae sedis
                                     2.1 Family Crypticolaceae M.W. Dick (1998) [monotypic]
                                     2.2 Family Myzocytiopsidaceae M.W. Dick (1997)
                                     3 Family Peronosporaceaeᵀ