Bigyra Cavalier-Smith, 1998 Subphylum Opalozoa Cavalier-Smith, 1992 Infraphylum Bikosia Cavalier-Smith, 2013 [monotypic] Class Bikosea Cavalier-Smith, 2013 Subclass Bicosidia Cavalier-Smith, 2006 Superorder Cyathobodoniae Cavalier-Smith, 1993 Order Bicoecida Grassé, 1926 1 Family Bicosoecidae Stein, 1878 2 Family Labromonadidae Cavalier-Smith, 2006 [monotypic]