Class Chondrichthyes Huxley, 1880 - cartilaginous fishes Subclass Elasmobranchii Bonaparte, 1838 - shark-like fishes Cohort Euselachii Hay, 1902 - spined sharks and relatives see Infraclass Euselachii Hay, 1902 Subcohort Neoselachii Compagno, 1977 - modern sharks and rays see Cohort Neoselachii Compagno, 1977 Superorder Squalomorphii (Compagno, 1973) see Division Squalea (Shirai, 1996) Order Pristiophoriformes Compagno, 1973 - saw sharks