Chordata Bateson, 1885 - chordates Class Elasmobranchii Bonaparte, 1838 see Subclass Elasmobranchii Bonaparte, 1838 Subclass Selachii see Subdivision Selachii Order Euselachii Hay, 1902 see Infraclass Euselachii Hay, 1902 Suborder Galei see Superorder Galeomorphi (Compagno, 1973) Series Galeoidei see Order Carcharhiniformes Compagno, 1973 Family Pliotremidae [monotypic] see Family Pristiophoridae Bleeker, 1859 Genus Pliotrema Regan, 1906