Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [crown] Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Clade neomura Cavalier-Smith, 1987
             Domain Eukaryota Chatton, 1925 - eukaryotes
               Clade discaria Cavalier-Smith, 2021
                 Clade dorsates Cavalier-Smith, 2021
                   Clade podiates Cavalier-Smith, 2012
                     [crown] Clade Amorphea Adl et al. 2012 [Simpson, Medina & Adl 2020]
                       [crown] Clade Obazoa Brown, Sharpe, Silberman, Heiss, Lang, Simpson & Roger 2013
                         [crown] Clade Opisthokonta Cavalier-Smith 1987 [Simpson & Medina 2020] - animal-fungal clade
                           Superkingdom Holozoa Lang, O'Kelly, Nerad, Gray & Burger, 2002
                             Clade filozoa Shalchian-Tabrizi, Minge, Espelund, Orr, Ruden, Jakobsen & Cavalier-Smith, 2008
                               Kingdom Animalia Linnaeus, 1758 - animals
                                 Clade Planulozoa Wallberg, Thollesson, Farris & Jondelius 2004
                                   Subkingdom Bilateria Hatschek, 1888 - bilaterians
                                     Clade Nephrozoa Jondelius, Ruiz-Trillo, Baguñà & Riutort 2002
                                       Infrakingdom Protostomia Grobben, 1908
                                         Superphylum Spiralia Schleip, 1929
                                           Clade Platytrochozoa Struck, Wey-Fabrizius, Golombek, Hering, Weigert, Bleidorn, Klebow, Iakovenko, Hausdorf, Petersen, Kück, Herlyn & Hankeln 2014
                                             Clade Rouphozoa Struck, Wey-Fabrizius, Golombek, Hering, Weigert, Bleidorn, Klebow, Iakovenko, Hausdorf, Petersen, Kück, Herlyn & Hankeln 2014
                                               Phylum Platyhelminthes Gegenbaur, 1859 - flatworms
                                                 Suborder Typhloplanida
                                                   Family Trigonostomidae Graff, 1905 (1882)
                                                     Subfamily Trigonostominaeᵀ (Graff, 1905) Luther, 1948 (1882)
                                                       01 Genus Beklemischeviella Luther, 1943
                                                       02 Genus Ceratopera den Hartog, 1964
                                                       03 Genus Cryptostiopera Ax, 1974 [monotypic]
                                                       04 Genus Feanora De Clerck & Schockaert, 1995 [monotypic]
                                                       05 Genus Lutheriella Hartog, 1966 [monotypic]
                                                       06 Genus Mahurubia Willems et al., 2005 [monotypic]
                                                       07 Genus Messoplana Hartog, 1966
                                                       08 Genus Parapharyngiella Willems et al., 2005 [monotypic]
                                                       09 Genus Petaliella Ehlers, 1974 [monotypic]
                                                       10 Genus Proxenetes Jensen, 1878
                                                       11 Genus Ptychopera Hartog, 1964
                                                       12 Genus Trigonostomumᵀ Schmidt, 1852