Vertebrata Cuvier, 1812 - vertebrates Gnathostomata Class Chondrichthyes Huxley, 1880 - cartilaginous fishes Subclass Elasmobranchii Bonaparte, 1838 - shark-like fishes Order †Eugeneodontida see Order Eugeneodontiformes Zangerl, 1981 1 Superfamily †Caseodontoidea Zangerl, 1981 2 Superfamily †Edestoidea Jaekel, 1899