Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Craniata Linnaeus, 1758 see Subphylum Vertebrata Cuvier, 1812
     Pisces
       Class Elasmobranchii Bonaparte, 1838 see Subclass Elasmobranchii Bonaparte, 1838
         Order Lamniformes Berg, 1958 - mackerel sharks
           Family Megachasmidae Taylor, Compagno & Struhsaker, 1983 - megamouth sharks