[Phylum] Chordata Bateson, 1885 - chordates Subphylum Craniata auct. Infraphylum Vertebrata Lamarck, 1801 - vertebrates Superclass Gnathostomata Gegenbaur, 1874 - jawed vertebrates Class Chondrichthyes Huxley, 1880 - cartilaginous fishes Superorder †Ctenacanthimorpha Order †Squatinactiformes Zangerl, 1981 [monotypic] Family †Squatinactidae Lund & Zangerl, 1974 1 Genus †Squatinactis Lund & Zangerl, 1974