[Kingdom] Animalia Linnaeus, 1758 - animals
   Grade Enterozoa
     Grade Cœlomata
       Phylum Vertebrata Lamarck, 1801 see Infraphylum Vertebrata Lamarck, 1801
         Branch Urochorda
           Class Saccata
             Order Thaliacea
               Genus Doliolum Quoy & Gaimard, 1834