Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         Biota
           [Kingdom Protista (Haeckel, 1866) - protists]
             [Phylum Protozoa (Goldfuss, 1818) C.T. von Siebold, 1854] see Kingdom Protozoa Goldfuss, 1818
               [Subphylum Sarcomastigophora] see Phylum Sarcomastigophora Honigberg & Balamuth, 1963
                 [Class Sarcodina]
                   [Subclass Actinopoda Calkins, 1902] see Phylum Actinopoda Calkins, 1902
                     [Order Proteomyxa] see Class Proteomyxidea Cavalier-Smith, 2002