Phylum Chordata Bateson, 1885 - chordates Subphylum Vertebrata Cuvier, 1812 - vertebrates Class Chondrichthyes Huxley, 1880 - cartilaginous fishes Order Squaliformes Compagno, 1973 - dogfish sharks 1 Family Dalatiidae Gray, 1851 - kitefin sharks 2 Family Centrophoridae Bleeker, 1859 - gulper sharks 3 Family Squalidae Blainville, 1816 - dogfish sharks 4 Family Echinorhinidae Gill, 1862 - bramble sharks