Phylum Chordata Bateson, 1885 - chordates
   Subphylum Vertebrata Cuvier, 1812 - vertebrates see Infraphylum Vertebrata Lamarck, 1801
     Pisces
       Class Chondrichthyes Huxley, 1880 - cartilaginous fishes
         Subclass Elasmobranchii Bonaparte, 1838 - shark-like fishes see Infraclass Elasmobranchii Bonaparte, 1838
           Order Carcharhiniformes Compagno, 1973 - ground sharks
             Family Carcharhinidae Jordan & Evermann, 1896 - requiem sharks
             Family Hemigaleidae Hasse, 1878 - weasel sharks
             Family Leptochariidae Gray, 1851 - barbeled houndsharks
             Family Proscylliidae Fowler, 1941 - finback catsharks
             Family Pseudotriakidae Gill, 1893 - false catsharks
             Family Scyliorhinidae Gill, 1862 - catsharks
             Family Sphyrnidae Bonaparte, 1840 - hammerhead sharks
             Family Triakidae Gray, 1851 - houndsharks