Phylum Bigyra Cavalier-Smith, 1998 Subphylum Sagenista Cavalier-Smith, 1995 Class Labyrinthulea Olive ex Cavalier-Smith, 1986 Order Labyrinthulida Lankester, 1877 - labyrinthulids 1 Family Labyrinthulidae Cienkowski, 1867 [monotypic] 2 Family Aplanochytriidae Leander ex Cavalier-Smith, 2012 [monotypic]