[Kingdom] Animalia Linnaeus, 1758 - animals
   Grade Enterozoa
     Grade Cœlomata
       Phylum Vertebrata (Lamarck, 1801)
         Branch Urochorda
           Class Saccata
             Order Ascidiæ
               Genus Clavellina Savigny, 1816 see Genus Clavelina Savigny, 1816