[Neoselachii] Compagno, 1977 - modern sharks and rays see Cohort Neoselachii Compagno, 1977
   Order Carcharhiniformes Compagno, 1973 - ground sharks
     Family Sphyrnidae Gill, 1872 - hammerhead sharks
       Genus Sphyrna Rafinesque, 1810
         1 Sphyrna corona Springer, 1940 - scolloped bonnethead
         2 Sphyrna couardi Cadenat, 1950 - whitefin hammerhead
         3 Sphyrna lewini (Griffith & Smith, 1834) - scalloped hammerhead
         4 Sphyrna media Springer, 1940 - scoophead
         5 Sphyrna mokarran (Rüppell, 1837) - great hammerhead
         6 Sphyrna tiburo (C. Linnaeus, 1758) - bonnet shark
         7 Sphyrna tudes (Valenciennes, 1822) - great hammerhead
         8 Sphyrna zygaena (C. Linnaeus, 1758) - common hammerhead