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 Gnathifera Ahlrichs, 1995
                                             Phylum Chaetognatha Leuckart, 1854 - chaetognaths
                                               Class Sagittoidea
                                                 Order Biphragmophora Casanova, 1985
                                                   Family Eukrohniidae Tokioka, 1965 [monotypic]
                                                     Genus Eukrohniaᵀ Ritter-Záhony, 1909
                                                       [Eukrohnia subtilis (Grassi, 1881) Michael, 1911] see Krohnitta subtilis (Grassi, 1881)
                                                       01 ?Eukrohnia sinica Zhang & Chen, 1983
                                                       02 Eukrohnia bathyantarctica David, 1958
                                                       03 Eukrohnia bathypelagica Alvariño, 1962
                                                       04 Eukrohnia calliops McLelland, 1989
                                                       05 Eukrohnia flaccicoeca Casanova, 1986
                                                       06 Eukrohnia fowleri Ritter-Záhony, 1909
                                                       06.0 [Eukrohnia richardi Burfield & Harvey, 1926] see Eukrohnia fowleri Ritter-Záhony, 1909
                                                       07 Eukrohnia hamataᵀ (Möbius, 1875)
                                                       07.0 [Eukrohnia richardi Germain & Joubin, 1912] see Eukrohnia hamata (Möbius, 1875)
                                                       08 Eukrohnia kitoui Kuroda, 1981
                                                       09 Eukrohnia macroneura Casanova, 1986
                                                       10 Eukrohnia minuta Silas & Srinivasan, 1968
                                                       11 Eukrohnia proboscidea Furnestin & Ducret, 1965