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]
           [Phycobionta]
             3 [Division Pyrrhophyta Pascher (1914) [monotypic]]
             4 [Division "Chromophyta" T.A.Chr. (1962), nom. nud.] see Division Chromophyta T.A.Chr. (1990)