Superphylum Deuterostomia Grobben, 1908 - deuterostomes see Infrakingdom Deuterostomia Grobben, 1908 Phylum Chordata Bateson, 1885 - chordates Subphylum Craniata auct. Infraphylum Myxinomorphi [monotypic] Class Myxini Jaekel, 1911 [monotypic] Order Myxiniformes [monotypic] - hagfishes Family Myxinidae Rafinesque, 1815 - hagfishes