Bigyra Cavalier-Smith, 1998 Subphylum Opalozoa Cavalier-Smith, 1992 1 Infraphylum Bikosia Cavalier-Smith, 2013 [monotypic] 2 Infraphylum Placidozoa Cavalier-Smith, 2013 3 Genus Pendulomonas Tong, 1997, incertae sedis 4 Family Bordnamonadidae Cavalier-Smith, 2013, incertae sedis [monotypic]