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 Rhabditina Chitwood, 1933
                   Superfamily Rhabditoidea Örley, 1880
                     01 Family Rhabditidae Örley, 1880
                     02 Family Rhabditonematidae
                     03 Family Odontorhabditidae
                     04 Family Steinernematidae Chitwood & Chitwood, 1937
                     05 Family Rhabdiasidae Railliet, 1916
                     06 Family Angiostomatidae Blanchard, 1895
                     07 Family Agfidae Dougherty, 1955
                     08 Family Strongyloididae Chitwood & McIntosh, 1934
                     09 Family Syrphonematidae Laumond & Lyon, 1971
                     10 Family Heterorhabditidae Poinar, 1975
                     11 Family Carabonematidae Stammer & Wachek, 1952
                     12 Family Pseudodiplogasteroididae Körner, 1954