Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [crown] 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 natates Cavalier-Smith, 2021
                   Clade photaria Cavalier-Smith, 2021
                     Clade eucorta Cavalier-Smith, 2021
                       Superkingdom Corticata Lankester, 1878 - corticates
                         Kingdom Chromista Caval.-Sm. (1981) - chromists
                           Subkingdom Harosa Cavalier-Smith, 2010
                             [crown] Clade Sar Adl et al. 2012 [Simpson & Dunthorn 2020]
                               Infrakingdom Halvaria Cavalier-Smith, 2010
                                 Superphylum Heterokonta Caval.-Sm. (1986)
                                   Phylum Oomycota Arx (1967)
                                     [Subphylum Peronosporomycotina] see Phylum Oomycota Arx (1967)
                                       [Class Peronosporomycetesᵀ M.W. Dick (2001)] see Class Peronosporea
                                         [Subclass "Peronosporomycetidae"ᵀ M.W. Dick (1984)] see Subclass Peronosporomycetidae M.W. Dick (2001)
                                           [Family Lagenidiaceaeᵀ] see Family Pythiaceae
                                             ?[Genus Lagenocystis H.F. Copel. (1956)] see Genus Lagena Vanterp. & Ledingham (1930)