Phylum Chordata Bateson, 1885 - chordates Subphylum Vertebrata Cuvier, 1812 - vertebrates Pisces Class Chondrichthyes Huxley, 1880 - cartilaginous fishes Subclass Elasmobranchii Bonaparte, 1838 - shark-like fishes Order Lamniformes Berg, 1958 - mackerel sharks Family Megachasmidae Taylor, Compagno & Struhsaker, 1983 - megamouth sharks