Subclass Holocephali Bonaparte, 1832 Order Chimaeriformes Obruchev, 1953 - chimaeras 1 Family Callorhinchidae Garman, 1901 - plownose chimaeras 2 Family Chimaeridae Rafinesque, 1815 - shortnose chimaeras 3 Family Rhinochimaeridae Garman, 1901 - longnose chimaeras