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 Deuterostomia Grobben, 1908
                                         Phylum Chordata Bateson, 1885 - chordates
                                           Subphylum Vertebrata Cuvier, 1812 - vertebrates
                                             Myopterygii - myopterygians
                                               Superclass Gnathostomata Gegenbaur, 1874 - jawed vertebrates
                                                 Grade Teleostomi Bonaparte, 1836
                                                   Euteleostomi - bony vertebrates
                                                     Class Actinopterygii Woodward, 1891 - ray-finned fishes
                                                       [crown] Actinopteri Cope, 1871
                                                         Subclass Neopterygii Regan, 1923
                                                           Infraclass Teleostei Müller, 1845
                                                             Supercohort Teleocephala de Pinna, 1996
                                                               Clupeocephala
                                                                 Cohort Otomorpha E.O. Wiley & G.D. Johnson, 2010
                                                                   Subcohort Ostariophysi Sagemehl, 1885
                                                                     Section Otophysa (Rosen & Greenwood, 1970)
                                                                       Cypriniphysi
                                                                         Superorder Characiphysae (Fink & Fink, 1981)
                                                                           Siluriphysi Fink & Fink, 1996
                                                                             Order Gymnotiformes Rafinesque, 1810 - American knifefishes
                                                                               Suborder Sternopygoidei
                                                                                 Superfamily Rhamphichthyoidea
                                                                                   Family Rhamphichthyidaeᵀ - sand knifefishes
                                                                                     Genus Rhamphichthysᵀ Müller & Troschel, 1848
                                                                                       Rhamphichthys apurensis (Fernández-Yépez, 1968)
                                                                                       Rhamphichthys atlanticus Triques, 1999
                                                                                       Rhamphichthys drepanium Triques, 1999
                                                                                       Rhamphichthys hahni (Meinken, 1937)
                                                                                       Rhamphichthys lineatus Castelnau, 1855
                                                                                       Rhamphichthys longior Triques, 1999
                                                                                       Rhamphichthys marmoratus Castelnau, 1855
                                                                                       Rhamphichthys pantherinus Castelnau, 1855
                                                                                       Rhamphichthys rostratus (C. Linnaeus, 1766)
                                                                                       Rhamphichthys schomburgki Kaup, 1856