[Phylum] Chordata Bateson, 1885 - chordates Subphylum Craniata auct. Infraphylum Vertebrata Lamarck, 1801 - vertebrates Superclass Gnathostomata Gegenbaur, 1874 - jawed vertebrates Class †Acanthodii Owen, 1846 - acanthodians Order †Acanthodiformes Berg, 1940 Family †Acanthodidae Agassiz, 1844 Genus †Acanthoessus Agassiz, 1832, nom. nud. see Genus Acanthodes Agassiz, 1833