Phylum Cercozoa Cavalier-Smith, 1998 Subphylum Filosa T. Cavalier-Smith & E.E.-Y. Chao, 2003 Superclass Monadofilosa Cavalier-Smith, 1997 see Subphylum Monadofilosa Cavalier-Smith, 1997 Class Thecofilosea T. Cavalier-Smith & E.E.-Y. Chao, 2003 Order Cryomonadida Cavalier-Smith, 1993