1 Natura - nature
2.1 actualia - actual entities
2 Mundus Plinius - physical world
3 naturalia - natural bodies
2 Biota
3.2 Domain Eukaryota Chatton, 1925 - eukaryotes
1 Amorphea Adl et al., 2012
3.2 Opisthokonta Cavalier-Smith, 1987
1 Holozoa
2.2.2 Kingdom Animalia Linnaeus, 1758 - animals
3 Epitheliozoa Ax, 1996
2 Eumetazoa Bütschli, 1910 - eumetazoans
2 Bilateria Hatschek, 1888 - bilaterians
7 Eubilateria Ax, 1987
2 Superphylum Deuterostomia Grobben, 1908 - deuterostomes
2.2 [crown] Phylum Chordata Bateson, 1885 - chordates
3.2 Subphylum Vertebrata Cuvier, 1812 - vertebrates
3.2.2 [crown] Myopterygii - myopterygians
2.2.2 [crown] Superclass Gnathostomata Zittel, 1879 - jawed vertebrates
2.2 Grade Teleostomi Bonaparte, 1836
2 Euteleostomi - bony vertebrates
2.2.2 Sarcopterygii Romer, 1955
2.2.2.2.2 [crown] Rhipidistia Cope, 1887
2 Tetrapodomorpha Ahlberg, 1991
2.2 [crown] Osteolepidimorpha
2.1.2.n.2 Superclass Tetrapoda Goodrich, 1930 - tetrapods
2.2.2.2.2.2.2.2.2.2 Reptiliomorpha Säve-Söderbergh, 1934
1.n Batrachosauria
2.2 Amniota Haeckel, 1866 - amniotes
2.1 Synapsida Osborn, 1903
1.n Therapsida Broom, 1905
2.2.2 Theriodontia
2 Eutheriodontia
2 Cynodontia Owen, 1861
2.2.2 Eucynodontia Kemp, 1982
2.2.2.3 Mammaliamorpha Rowe, 1988
2.2 Mammaliaformes Rowe, 1988
5.2.2.2.2 Holotheria
3 Class Mammalia Linnaeus, 1758 - mammals
1.2 Subclass Australosphenida Luo, Cifelli & Kielan-Jaworowska, 2001
2.2.1 ?Order Monotremata C.L. Bonaparte, 1837 - monotremes
3 Family Tachyglossidae Gill, 1872 - spiny anteaters
1 Genus Zaglossus Gill, 1877 - long-nosed echidna
3 Zaglossus bruijniᵀ (Peters & Doria, 1876) - western long-beaked echidna