[Kingdom] Animalia Linnaeus, 1758 - animals
   Grade Enterozoa
     Grade Cœlomata
       Phylum Appendiculata {Lankester}
         Branch Rotifera
           Class Rotifera
             Order Tubicola Glenn, 1904
               1 Genus Stephanoceras Gistl, 1848, nom. null. see Genus Stephanoceros Ehrenberg, 1832
               2 Genus Melicerta Schrank, 1803 see Genus Floscularia Cuvier, 1798