Phylum Bigyra Cavalier-Smith, 1998 Subphylum Sagenista Cavalier-Smith, 1995 Class Labyrinthulea Olive ex Cavalier-Smith, 1986 Superfamily Amphifiloidea Cavalier-Smith, 2012 Family Amphifilidae Cavalier-Smith, 2012 [monotypic] 1 Genus Amphifilaᵀ Cavalier-Smith, 2012 [monotypic]