[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 Sphyrna zygaena (C. Linnaeus, 1758) - common hammerhead