Fishes Class Elasmobranchii Bonaparte, 1838 see Subclass Elasmobranchii Bonaparte, 1838 Order Carchariniformes Compagno, 1973 see Order Carcharhiniformes Compagno, 1973 Family Proscylliidae Fowler, 1941 - finback catsharks Genus Ctenacis L.J.V. Compagno, 1973