[Neoselachii] Compagno, 1977 - modern sharks and rays see Infraclass Elasmobranchii Bonaparte, 1838 Order Carcharhiniformes Compagno, 1973 - ground sharks Family Sphyrnidae Bonaparte, 1840 - hammerhead sharks Genus Eusphyra Gill, 1862 [monotypic] 1 Eusphyra blochii (Cuvier, 1817) - arrowhead