Subclass Elasmobranchii Bonaparte, 1838 - shark-like fishes Count: - Cohort Euselachii Hay, 1902 - spined sharks and relatives see Infraclass Euselachii Hay, 1902 Count: - Subcohort Neoselachii Compagno, 1977 - modern sharks and rays see Cohort Neoselachii Compagno, 1977 Count: - Order Lamniformes Berg, 1958 - mackerel sharks Count: - Family Odontaspididae Müller & Henle, 1839 - sand tiger sharks Count: -