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