living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
     Kingdom Animalia Linnaeus, 1758 - animals
       Subkingdom Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
         Phylum Nemata Cobb, 1919 see Phylum Nematoda Gegenbaur, 1859
           Class Adenophorea
             Subclass Chromadoria Adamson, 1987
               Order Desmoscolecida Filipjev, 1929
                 Suborder Desmoscolecina Chitwood, 1933
                   Superfamily Greeffielloidea
                     Family Greeffiellidae
                       Genus Greeffiellopsis Schrage & Gerlach, 1975