Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Craniata Linnaeus, 1758 see Subphylum Craniata auct.
     Pisces
       Class Elasmobranchii Bonaparte, 1838 see Infraclass Elasmobranchii Bonaparte, 1838
         Order Carcharhiniformes Compagno, 1973 - ground sharks
           1 Family Scyliorhinidae Gill, 1862 - catsharks
           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, 1878 - weasel sharks
           7 Family Carcharhinidae Jordan & Evermann, 1896 - requiem sharks
           8 Family Sphyrnidae Bonaparte, 1840 - hammerhead sharks