Fishes Class Myxini (Jaekel, 1911) see Subclass Myxinoidea Order Myxiniformes - hagfishes Family Myxinidae Rafinesque, 1815 - hagfishes Subfamily Eptatretinae Genus Heptatrema Duméril, 1832, nom. van. see Genus Eptatretus Cloquet, 1819