[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Pisces
     Class Chondrichthyes Huxley, 1880 - cartilaginous fishes
       Order Carcharhiniformes Compagno, 1973 - ground sharks
         1 Family Scyliorhinidae Gill, 1862 - cat sharks
         2 Family Pseudotriakidae Gill, 1893 - false catsharks
         3 Family Leptochariidae Gray, 1851 - barbeled houndsharks
         4 Family Triakidae Gray, 1851 - houndsharks
         5 Family Hemigaleidae Hasse, 1879 - weasel sharks
         6 Family Carcharhinidae Jordan & Evermann, 1896 - requiem sharks
         7 Family Sphyrnidae Gill, 1872 - hammerhead sharks