Kingdom Animalia Linnaeus, 1758 - animals Phylum Craniata Linnaeus, 1758 see Subphylum Vertebrata Cuvier, 1812 Pisces Class Elasmobranchii Bonaparte, 1838 see Subclass Elasmobranchii Bonaparte, 1838 Order Hexanchiformes Compagno, 1973 - six-gill sharks Family Chlamydoselachidae Garman, 1884 - frill sharks