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]
           [Kingdom Protista (Haeckel, 1866) - protists]
             [Phylum Protozoa (Goldfuss, 1818) C.T. von Siebold, 1854] see Kingdom Protozoa Goldfuss, 1818
               [Class Sarkodina] see Class Sarcodina
                 [Subclass Heliozoa E.H.P.A. Haeckel, 1886 stat. nov. L. Margulis, 1974 emend.] see [unranked] Heliozoa