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 Nemertea Schultze, 1851 - ribbon worms
           Class Enopla Schultze, 1851
             Order Hoplonemertea Hubrecht, 1879
               Suborder Monostilifera Brinkmann, 1917
                 Family Prosorhochmidae Bürger, 1895
                   01 Genus Prosorhochmusᵀ Keferstein, 1862
                   02 Genus Prosadenoporus Bürger, 1890
                   03 Genus Oerstedia Quatrefages, 1846
                   04 Genus Paroerstedia
                   05 Genus Oerstediella Friedrich, 1935
                   06 Genus Antarctonemertes Friedrich, 1955
                   07 Genus Divanella Gibson, 1974
                   08 Genus Friedrichia Kirsteuer, 1965
                   09 Genus Obürgeria Corrêa, 1954
                   10 Genus Gononemertes Bergendal, 1900
                   11 Genus Leptonemertes Girard, 1893
                   12 Genus Katechonemertes Moore & Gibson, 1981
                   13 Genus Antiponemertes Moore & Gibson, 1981
                   14 Genus Argonemertes Moore & Gibson, 1981
                   15 Genus Acteonemertes Pantin, 1961
                   16 Genus Potamonemertes Moore & Gibson, 1973
                   17 Genus Campbellonemertes Moore & Gibson, 1972
                   18 Genus Pantinonemertes Moore & Gibson, 1981
                   19 Genus Geonemertes Semper, 1863