Vertebrata Cuvier, 1812 - vertebrates Gnathostomata Class Chondrichthyes Huxley, 1880 - cartilaginous fishes Order †Iniopterygiformes Zangerl & Case, 1973 1 Family †Iniopterygidae Zangerl & Case, 1973 2 Family †Sibyrhynchidae Zangerl & Case, 1973