Kingdom Protozoa Goldfuss, 1818 - protozoa Subkingdom Gymnomyxa (Lankester, 1878) Cavalier-Smith, 2002 see Kingdom Protozoa Goldfuss, 1818 Infrakingdom Rhizaria Cavalier-Smith, 2002 Phylum Retaria Cavalier-Smith, 2002 1 Subphylum Foraminifera d'Orbigny, 1826 2 Subphylum Radiolaria Müller, 1858 see Subphylum Radiozoa Cavalier-Smith, 1987