article: Chondrichthyes
links: Batoidea Chimaera (fish) Torpediniformes Thresher Shark Carcharhiniformes Lamniformes Megalodon Skate (fish) Thomas Henry Huxley Great White Shark Chimaeriformes Silurian Selachimorpha Holocephali Myliobatiformes Elasmobranchii