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 Enoplia Pearse, 1942
               Order Dorylaimida Pearse, 1942
                 Suborder Diphtherophorina Coomans & Loof, 1970
                   Superfamily Trichodoroidea Thorne, 1935
                     Family Trichodoridae Thorne, 1935
                       Genus Trichodorus Cobb, 1913
                         1 Trichodorus primativus see Trichodorus primitivus (De Man, 1880)
                         2 Trichodorus pachydermus Seinhorst, 1954 see Paratrichodorus pachydermus (Seinhorst, 1954)