Kingdom Protozoa Goldfuss, 1818 - protozoa
Subkingdom Neozoa Cavalier-Smith, 1993
see Kingdom Protozoa Goldfuss, 1818
Infrakingdom Neomonada Cavalier-Smith, 1997
Phylum Neomonada Cavalier-Smith, 1997
Subphylum Mesomycetozoa Herr, Ajello, Taylor, Arseculeratne & Mendoza, 1999
Class Choanoflagellatea Cavalier-Smith, 1998