Phylum Chordata Bateson, 1885 - chordates Subphylum Vertebrata Cuvier, 1812 - vertebrates Class Chondrichthyes Huxley, 1880 - cartilaginous fishes Order Squaliformes Compagno, 1973 - dogfish sharks Family Centrophoridae Bleeker, 1859 - gulper sharks Genus Deania Jordan & Snyder, 1902 - longnose dogfish Deania calcea (Lowe, 1839) - birdbeak dogfish Deania hystricosa (Garman, 1906) Deania profundorum (Smith & Radcliffe, 1912) - arrowhead dogfish