Kingdom Protozoa Goldfuss, 1818 - protozoa Subkingdom Corticata Lankester, 1878 see Subkingdom Biciliata Infrakingdom Excavata T. Cavalier-Smith, 2002 see Supergroup Excavata Cavalier-Smith, 2002 Superphylum Discicristata Cavalier-Smith, 1998 Phylum Percolozoa Cavalier-Smith, 1992 Genus Naegleria Aléxéieff, 1912 Naegleria gruberi (Schardinger, 1899)