[Kingdom] Animalia Linnaeus, 1758 - animals
   Grade Enterozoa
     Grade Cœlomata
       Phylum Platyelmia
         Branch Ciliata
           Class Planariæ
             Order Dendrocœla
               1 Genus Polycelis Ehrenberg, 1831
               2 Genus Bipalium Stimpson, 1857