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 Euteleosteomorpha (Greenwood et al., 1966)
                                                                   Subcohort Neoteleostei Nelson, 1969
                                                                     Infracohort Eurypterygia (Rosen, 1973)
                                                                       Section Ctenosquamata Rosen, 1973
                                                                         Subsection Acanthomorphata (Rosen, 1973)
                                                                           Euacanthomorpha (Johnson & Patterson, 1993)
                                                                             Holacanthopterygii Johnson & Patterson, 1993
                                                                               Acanthopterygii Rosen & Patterson, 1969
                                                                                 Euacanthopterygii
                                                                                   Division Percomorphacea Wiley & Johnson, 2010
                                                                                     Series Smegmamorpharia Johnson & Patterson, 1993
                                                                                       Order Synbranchiformes incertae sedis - swamp eels
                                                                                         Suborder Mastacembeloidei
                                                                                           Family Mastacembelidaeᵀ - spiny-eels
                                                                                             Genus Mastacembelusᵀ
                                                                                               Mastacembelus armatus (Lacépède, 1800) - tiretrack eel