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 dorsates Cavalier-Smith, 2021
                   Clade podiates Cavalier-Smith, 2012
                     [crown] Clade Amorphea Adl et al. 2012 [Simpson, Medina & Adl 2020]
                       [crown] Clade Obazoa Brown, Sharpe, Silberman, Heiss, Lang, Simpson & Roger 2013
                         [crown] Clade Opisthokonta Cavalier-Smith 1987 [Simpson & Medina 2020] - animal-fungal clade
                           Superkingdom Holozoa Lang, O'Kelly, Nerad, Gray & Burger, 2002
                             Class Ichthyosporea Cavalier-Smith, 1998 [coordinate rank]
                               Order Ichthyophonidaᵀ Cavalier-Smith, 1998
                                 [Genus Psorospermium Hilgendorf, 1883, nom. illeg. [monotypic]] see Genus Psorospermis Cavalier-Smith, 2012
                                   [Psorospermium haeckelii Hilgendorf, 1883] see Psorospermis haeckeli (Hilgendorf, 1883), orth. inval.