Domain Eucaryota Subdomain Chlorota Doweld (2001) Kingdom Euglenobiota Leedale ex Doweld (2001) Subkingdom Percolobiotina Doweld, 2001 Phylum Nucleariozoa Mikrjukov, 2000 [monotypic] Class Nucleariatea Doweld, 2001 [monotypic] Order Nucleariida Cavalier-Smith, 1993 1 Family Nucleariidae Cann & Page, 1979