Deuterostomia Grobben, 1908 - deuterostomes see Infrakingdom Deuterostomia Grobben, 1908
   Chordata Bateson, 1885 - chordates
     Craniata auct. see Subphylum Vertebrata Cuvier, 1812
       Vertebrata (Lamarck, 1801) - vertebrates see Subphylum Vertebrata Cuvier, 1812
         Myopterygii - myopterygians
           Gnathostomata Gegenbaur, 1874 - jawed vertebrates
             Chondrichthiomorphi
               Chondrichthyes Huxley, 1880 - cartilaginous fishes
                 Elasmobranchii Bonaparte, 1838 - shark-like fishes
                   Euselachii Hay, 1902 - sharks and rays, and related fossils
                     Neoselachii Compagno, 1977
                       Selachii - sharks
                         Squalomorphi
                           Squaliformes Compagno, 1973 - dogfish sharks
                             Dalatiidae Gray, 1851 - kitefin sharks
                               Squaliolus Smith & Radcliffe, 1912
                                 Squaliolus laticaudus Smith & Radcliffe, 1912 - spined pigmy shark