[Class] Cestoda - tapeworms see Infraclass Cestoda
   Order Trypanorhyncha Diesing, 1863
     Suborder Trypanoselachoida Olson, Caira, Jensen, Overstreet, Palm & Beveridge, 2010
       Superfamily Gymnorhynchoidea Dollfus, 1935
         Family Sphyriocephalidae Pintner, 1913
           Genus Hepatoxylon Bosc, 1811
             1 Hepatoxylon trichiuriᵀ (Holten, 1802)
             2 Hepatoxylon megacephalum (Rudolphi, 1819)