[Kingdom] Animalia Linnaeus, 1758 - animals
   Grade Enterozoa
     Grade Cœlomata
       Phylum Platyelmia
         Branch Suctoria
           Class Cestoidea - cestodes, tapeworms
             Order Tetraphyllidea Lankester, 1877
               1 Genus Tetrarhynchus Rudolphi, 1809, nom. inq.
               2 Genus Phyllobothrium van Beneden, 1849