Phylum Bigyra Cavalier-Smith, 1998 Subphylum Sagenista Cavalier-Smith, 1995 Class Labyrinthulea Olive ex Cavalier-Smith, 1986 1 Order Thraustochytrida Sparrow, 1973 - thraustochytrids 2 Superfamily Amphifiloidea Cavalier-Smith, 2012 3 Order Labyrinthulida Lankester, 1877 - labyrinthulids