[Neoselachii] Compagno, 1977 - modern sharks and rays see Infraclass Elasmobranchii Bonaparte, 1838
   Order Carcharhiniformes Compagno, 1973 - ground sharks
     Family Triakidae Gray, 1851 - houndsharks
       Genus Hemitriakis Herre, 1923
         1 Hemitriakis japanica (Müller & Henle, 1839) - Japanese topeshark
         2 Hemitriakis leucoperiptera Herre, 1923 - whitefin topeshark