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 Carcharhiniformes Compagno, 1973 - ground sharks
           1 Family Scyliorhinidae Gill, 1862 - cat sharks
           2 Family Proscylliidae Fowler, 1941 - finback catsharks
           3 Family Pseudotriakidae Gill, 1893 - false catsharks
           4 Family Leptochariidae Gray, 1851 - barbeled houndsharks
           5 Family Triakidae Gray, 1851 - houndsharks
           6 Family Hemigaleidae Hasse, 1879 - weasel sharks
           7 Family Carcharhinidae Jordan & Evermann, 1896 - requiem sharks
           8 Family Sphyrnidae Gill, 1872 - hammerhead sharks