[Kingdom] Animalia Linnaeus, 1758 - animals
   Grade Enterozoa
     Grade Cœlomata
       1 Phylum Echinoderma
       2 Phylum Platyelmia
       3 Phylum Appendiculata {Lankester}
       4 Phylum Gephyræa
       5 Phylum Mollusca Linnaeus, 1758 - molluscs
       6 Phylum Enteropneusta Gegenbaur, 1870 see Class Enteropneusta Gegenbaur, 1870
       7 Phylum Vertebrata (Lamarck, 1801)
       8 Phylum Nematoidea
       9 Phylum Chætognatha Leuckart, 1854 - chaetognaths