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 Superfamily †Caseodontoidea Zangerl, 1981 1 Family †Caseodontidae Zangerl, 1981 2 Family †Eugeneodontidae Zangerl, 1981