[Neoselachii] Compagno, 1977 - modern sharks and rays see Infraclass Elasmobranchii Bonaparte, 1838
   Order Carcharhiniformes Compagno, 1973 - ground sharks
     Family Sphyrnidae Bonaparte, 1840 - hammerhead sharks
       1 Genus Eusphyra Gill, 1862 [monotypic]
       2 Genus Sphyrna Rafinesque, 1810