Kingdom Protozoa Goldfuss, 1818 - protozoa Subkingdom Gymnomyxa (Lankester, 1878) Cavalier-Smith, 2002 see Kingdom Protozoa Goldfuss, 1818 Infrakingdom Rhizaria Cavalier-Smith, 2002 Phylum Heliozoa Haeckel, 1866 see Subphylum Heliozoa Haeckel (1866) 1 Class Centrohelea Kühn, 1926 2 ?Class Nucleohelea Cavalier-Smith, 1993 see Class Raphidophyceae Chadef. ex P.C.Silva (1980)