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 Secernentea Von Linstow, 1905
             Subclass Rhabditia see Superorder Rhabditica Hodda, 2007
               Order Rhabditida Chitwood, 1933
                 Suborder Cephalobina Andrassy, 1974
                   Superfamily Panagrolaimoidea Thorne, 1937
                     1 Family Panagrolaimidae Thorne, 1937
                     1 Family Pangrolaimidae see Family Panagrolaimidae Thorne, 1937
                     2 Family Alirhabditidae Suryawanshi, 1971
                     3 Family Brevibuccidae Paramonov, 1956