Vertebrata Cuvier, 1812 - vertebrates Gnathostomata Class Chondrichthyes Huxley, 1880 - cartilaginous fishes Subclass Holocephali Bonaparte, 1832 Order Chimaeriformes Obruchev, 1953 - chimaeras Suborder Chimaeroidei Patterson, 1965 1 Family Chimaeridae Rafinesque, 1815 - shortnose chimaeras 2 Family Rhinochimaeridae Garman, 1901 - longnose chimaeras 3 Family Callorhinchidae Garman, 1901 - plownose chimaeras