Phylum Chordata Bateson, 1885 - chordates Subphylum Vertebrata Cuvier, 1812 - vertebrates Class Mixini see Class Myxini (Jaekel, 1911) Order Myxiniformes - hagfishes Family Myxinidae Rafinesque, 1815 - hagfishes Genus Myxine Linnaeus, 1758 Myxine ios Fernholm, 1981 - white-headed hagfish