Kingdom Protozoa Goldfuss, 1818 - protozoa Subkingdom Gymnomyxa (Lankester, 1878) Cavalier-Smith, 2002 see Kingdom Protozoa Goldfuss, 1818 Infrakingdom Rhizaria Cavalier-Smith, 2002 Phylum Cercozoa Cavalier-Smith, 1998 Genus Cercomonas F. Dujardin, 1841 1 ?Cercomonas crassicauda Dujardin, 1841