Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [[crown] organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           [Domain Eucaryota]
             [Subdomain Chlorota Doweld (2001)]
               [Kingdom Rhodymeniobiota Starobogatov ex Doweld (2001)]
                 [Subkingdom Cryptomonadobiotina Doweld (2001) [monotypic]]
                   [Phylum Cryptomonadophytaᵀ Pascher (1931)]
                     [Class Cryptomonadophyceaeᵀ Pascher ex Schoenichen (1925)]