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
                                 1 Genus †Galtierella M. Krings, T.N. Taylor, Dotzler & Decombeix (2009), incertae sedis
                                 2 Genus Ostracoblabe Bornet & Flahault (1891), incertae sedis
                                 3 Genus Halioticida Muraosa & Hatai (2009), incertae sedis
                                 4.1 Genus Haliphthoros Vishniac (1958), incertae sedis [monotypic]
                                 4.2 Genus Halodaphnea M.W. Dick (1998), incertae sedis
                                 5 Family †Combresomycetaceae incertae sedis [monotypic]
                                 6 Family Eurychasmataceae H.E. Petersen (1905), incertae sedis
                                 7 Subclass Eogamia Caval.-Sm. (2013) [paraphyletic]
                                 7.n.1 Subclass Saprolegniidae
                                 7.n.2 Subclass Peronosporidaeᵀ