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 Sarcomonadea Cavalier-Smith, 1993 1 Genus Metopion Larsen & Patterson, 1990 2 Genus Cercomonas F. Dujardin, 1841 3 Family Heteromitidae Kent, 1880