Protozoa Goldfuss, 1818 - protozoa Corticata Lankester, 1878 see Subkingdom Biciliata Excavata T. Cavalier-Smith, 2002 see Supergroup Excavata Cavalier-Smith, 2002 Discicristata Cavalier-Smith, 1998 Percolozoa Cavalier-Smith, 1992 Percolatea Cavalier-Smith, 2003 Percolomonadida Cavalier-Smith, 1993 1 Percolomonas T. Fenchel & D.J. Patterson, 1986