Between brackets is the number of accepted species
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- Biota
- Kingdom Animalia
- Phylum Acanthocephala
- Phylum Agmata †
- Phylum Animalia (awaiting allocation)
- Phylum Animalia incertae sedis
- Phylum Annelida
- Phylum Arthropoda
- Phylum Brachiopoda
- Phylum Bryozoa
- Phylum Cephalorhyncha incertae sedis
- Phylum Chaetognatha
- Phylum Chitinozoa †
- Phylum Chordata
- Subphylum Cephalochordata
- Subphylum Tunicata accepted as Urochordata
- Subphylum Urochordata
- Subphylum Vertebrata
- Superclass Tetrapoda
- Class Amphibia
- Class Aves
- Order Accipitriformes
- Order Aepyornithiformes †
- Order Alexornithiformes †
- Order Ambiortiformes †
- Order Anseriformes
- Order Apodiformes
- Order Apterygiformes
- Order Archaeopterygiformes †
- Order Ardeiformes
- Order Aves (awaiting allocation)
- Order Aves incertae sedis †
- Order Bucerotiformes
- Order Caprimulgiformes
- Order Cariamiformes
- Order Carinatae (awaiting allocation)
- Order Casuariiformes
- Order Cathartiformes
- Order Cathayornithiformes †
- Order Chaoyangiformes †
- Order Charadriiformes
- Order Charadriimorphae incertae sedis
- Order Ciconiiformes
- Order Coliiformes
- Order Columbiformes
- Order Columbiiformes accepted as Columbiformes
- Order Colymbiformes accepted as Podicipediformes
- Order Confuciusornithiformes †
- Order Coraciiformes
- Order Cuculiformes
- Order Cypselomorphae incertae sedis
- Order Diatrymiformes †
- Order Dinornithiformes †
- Order Enantiornithes incertae sedis †
- Order Enantiornithiformes †
- Order Eoenantiornithiformes †
- Order Euenantiornithes incertae sedis †
- Order Falconiformes
- Order Galliformes
- Order Gansuiformes †
- Order Gastornithiformes †
- Order Gaviiformes
- Order Gobipterygiformes †
- Order Gruiformes
- Order Hesperornithiformes †
- Order Iberomesornithiformes †
- Order Ichthyornithiformes †
- Order Jeholornithiformes †
- Order Liaoningornithiformes †
- Order Limnornithiformes †
- Order Lithornithiformes †
- Order Longipterygiformes †
- Order Mystiornithiformes †
- Order Neognathae incertae sedis
- Order Omnivoropterygiformes †
- Order Opisthocomiformes
- Order Ornithothoraces incertae sedis
- Order Ornithuromorpha incertae sedis †
- Order Palaeocursornithiformes †
- Order Palaeognathae (awaiting allocation)
- Order Pangalliformes incertae sedis
- Order Panpsittaciformes incertae sedis
- Order Passeriformes
- Family Acanthisittidae Sundevall, 1872
- Family Acanthizidae Bonaparte, 1854
- Family Aegithalidae
- Family Alaudidae Vigors, 1825
- Family Alcippeidae Cai et al., 2019
- Family Artamidae
- Family Atrichornithidae Stejneger, 1855
- Family Bombycillidae Swainson, 1831
- Family Callaeatidae Gray, 1841
- Family Callaeidae
- Family Campephagidae
- Family Cardinalidae
- Family Catamblyrhynchidae
- Family Certhiidae
- Genus Auriparus Baird, 1864
- Genus Campilorhynchus Swainson, 1836 accepted as Campylorhynchus Spix, 1824
- Genus Campylorhynchus Spix, 1824
- Genus Campylorhyncus Bonaparte, 1854 accepted as Campylorhynchus Spix, 1824
- Genus Campylorynchus Wied, 1846 accepted as Campylorhynchus Spix, 1824
- Genus Campylus Lafresnaye, 1844 accepted as Campylorhynchus Spix, 1824
- Genus Catherpes Baird, 1858
- Species Catherpes mexicanus (Swainson, 1829)
- Genus Cerithia Perry, 1810 accepted as Certhia Linnaeus, 1758
- Genus Certhia Linnaeus, 1758
- Genus Certhius Olphe-Galliard, 1888 accepted as Certhia Linnaeus, 1758
- Genus Cinnicerthia Hartlaub, 1846 accepted as Cinnycerthia Lesson, 1844
- Genus Cinnycerthia Lesson, 1844
- Genus Cyphorhinus Cabanis, 1844
- Genus Cyphorinus Gray, 1847 accepted as Cyphorhinus Cabanis, 1844
- Genus Dendrobates Morris in Wood, 1837
- Genus Donacobius Swainson, 1831
- Genus Donocobius Swainson, 1831 accepted as Donacobius Swainson, 1831
- Genus Dryocopus Wied, 1831
- Genus Ferminia Barbour, 1926
- Genus Hemiura Ridgway, 1888
- Genus Henicorhina Sclater & Salvin, 1868
- Genus Heterorhina Baird, 1864 accepted as Henicorhina Sclater & Salvin, 1868
- Genus Hylorchilus Nelson, 1897
- Genus Kampilorhynchus Lesson, 1843 accepted as Campylorhynchus Spix, 1824
- Genus Kampylorhynchus Spix, 1824 accepted as Campylorhynchus Spix, 1824
- Genus Microbates Sclater & Salvin, 1873
- Genus Microcerculus Salvin, 1861
- Genus Nannorchilus Ridgway, 1904 accepted as Uropsila Sclater & Salvin, 1873
- Genus Odontorchilus Richmond, 1915
- Genus Odontorhynchus Pelzeln, 1868 accepted as Odontorchilus Richmond, 1915
- Genus Polioptila Sclater, 1855
- Genus Ramphocaenus Vieillot, 1819
- Genus Ramphocenus Le Maout, 1853
- Genus Ramphocoenus Vieillot, 1819
- Genus Rhamphocaenus Strickland, 1841
- Genus Rhamphocenes Blyth in Blyth, 1840
- Genus Rhamphocoenus Vieillot, 1819
- Genus Salpinctes Cabanis, 1847
- Genus Salpinctus Sundevall, 1873 accepted as Salpinctes Cabanis, 1847
- Genus Salpornis Gray, 1847
- Genus Thrioterus Giebel, 1877
- Genus Thriotherus Gray, 1855
- Genus Thriothores Lesson, 1840
- Genus Thriothorus Vieillot, 1816
- Genus Thriothyrus Gray, 1841
- Genus Thriotorus Giebel, 1877
- Genus Thryomanes Sclater, 1862
- Genus Thryorchilus Oberholser, 1904
- Genus Thryotherus Agassiz, 1846
- Genus Thryothorus Vieillot, 1816
- Genus Thryothurus Swainson, 1836
- Genus Thryotorus Reichenbach, 1850
- Genus Troglodites Cuvier, 1817 accepted as Troglodytes Vieillot, 1807
- Genus Troglodytes Möhring, 1758 accepted as Troglodytes Vieillot, 1807
- Genus Tryomanes Giebel, 1877 accepted as Thryomanes Sclater, 1862
- Genus Uropsila Sclater & Salvin, 1873
- Family Certhioidea incertae sedis
- Family Chaetopidae Fjeldså, Ericson, Johansson & Zuccon, 2015
- Family Cinclidae Cabanis, 1847
- Family Cisticolidae
- Family Climacteridae
- Family Coerebidae Gray, 1840
- Family Colluricinclidae
- Family Compsothlypidae
- Family Conopophagidae
- Family Corcoracidae
- Family Corvidae Vigors, 1825
- Family Cotingidae
- Family Cracticidae
- Family Dendrocolaptidae
- Family Dicaeidae
- Family Dicruridae Vigors, 1825
- Family Drepanididae accepted as Fringillidae Vigors, 1825
- Family Dulidae ScIater, 1862
- Family Emberizidae Vigors, 1831
- Family Ephthianuridae
- Family Estrildidae
- Family Eupetidae
- Family Eurylaimidae Swainson, 1837
- Family Formicariidae
- Family Fringillidae Vigors, 1825
- Family Furnariidae Gray, 1840
- Family Grallinidae
- Family Hirundinidae Vigors, 1825
- Family Hyliotidae Fjeldså, 2014
- Family Hylocitreidae Fjeldså, Ericson, Johansson & Zuccon, 2015
- Family Hypocolidae
- Family Hypocoliidae
- Family Icteridae Vigors, 1825
- Family Irenidae
- Family Laniidae Swainson, 1824
- Family Locustellidae Bonaparte, 1854
- Family Malaconotidae
- Family Maluridae
- Family Megaluridae Blyth, 1875 accepted as Locustellidae Bonaparte, 1854
- Family Melampittidae Schodde & Christidis, 2014
- Family Melanocharitidae
- Family Meliphagidae Vigors, 1825
- Family Menuridae Gray, 1847
- Family Mimidae
- Family Mniotillidae accepted as Parulidae
- Family Modulatricidae Fjeldså, Ericson, Johansson & Zuccon, 2015
- Family Monarchidae
- Family Motacillidae Vigors, 1825
- Family Muscicapidae Fleming, 1822
- Family Musicapidae Vigors, 1825 accepted as Muscicapidae Fleming, 1822
- Family Nectariniidae Vigors, 1825
- Family Neosittidae
- Family Nicatoridae Cracraft, Beresford & Barker, 2014
- Family Oriolidae Vigors, 1825
- Family Orthonychidae
- Family Oxyrunchidae
- Family Oxyruncidae
- Family Pachycephalidae
- Family Palaeoscinidae Howard, 1957 †
- Family Palaeospizidae Wetmore, 1925 †
- Family Paradisaeidae
- Family Paramythiidae
- Family Pardalotidae
- Family Paridae Vigors, 1825
- Family Parulidae
- Family Passerellidae Cabanis & Heine, 1850-51
- Family Passeres (awaiting allocation)
- Family Passeridae Illiger, 1811
- Family Passeriformes (awaiting allocation)
- Family Passeriformes incertae sedis
- Family Petroicidae
- Family Philepittidae
- Family Phytotomidae
- Family Picathartidae
- Family Pipridae Rafinesque, 1815
- Family Pittidae Swainson, 1831
- Family Pityriaseidae Mayr & Amadon, 1951
- Family Pityriasididae
- Family Platysteiridae
- Family Ploceidae
- Family Pomatostomidae
- Family Primoscenidae Harrison & Walker, 1977 † accepted as Zygodactylidae Brodkorb, 1971 †
- Family Prionopidae
- Family Prunellidae Richmond, 1908
- Family Ptilonorhynchidae Gray, 1846
- Family Pycnonotidae Gray, 1840
- Family Regulidae
- Family Rhinocryptidae
- Family Rhipiduridae
- Family Saxicolidae
- Family Scytalopodidae Müller, 1846
- Family Sittidae Lesson, 1828
- Family Sturnidae Vigors, 1825
- Family Sylviidae Vigors, 1825
- Family Tanagridae Vigors, 1825 accepted as Thraupidae
- Family Tersinidae
- Family Thamnophilidae Vigors, 1825
- Family Thraupidae
- Family Timaliidae Delacour, 1946
- Family Troglodytidae Swainson, 1832
- Family Turdidae
- Family Tyrannidae Vigors, 1825
- Family Vangidae
- Family Vireonidae Swainson, 1837
- Family Xenicidae
- Family Zeledoniidae
- Family Zosteropidae Bonaparte, 1853
- Family Zygodactylidae Brodkorb, 1971 †
- Order Patagopteryformes †
- Order Pelecaniformes
- Order Phaethontiformes
- Order Phoenicopteriformes
- Order Piciformes
- Order Podicipediformes
- Order Praeornithiformes †
- Order Procellariiformes
- Order Psittaciformes
- Order Pygostylia incertae sedis †
- Order Remiornithiformes †
- Order Rheiformes
- Order Sandcoleiformes †
- Order Sphenisciformes
- Order Stereornithes †
- Order Strigiformes
- Order Struthioniformes
- Order Suliformes
- Order Tinamiformes
- Order Trogoniformes
- Order Upupiformes
- Order Vegaviiformes †
- Order Yandangithformes †
- Order Yanornithiformes †
- Family Gobioolithidae Mikhailov, 1996 †
- Family Medioolithidae Kohring & Hirsch, 1996 †
- Family Morsoravidae Mayr, 2023 †
- Family Ornitholithidae Dughi & Sirugue, 1962 †
- Family Xenaviculidae Mayr & Kitchener, 2024 †
- Family Zealandornithidae Worthy, Scofield, Salisbury, Hand, De Pietri & Archer, 2022 †
- Genus Janavis Benito, Kuo, Widrig, Jagt & Field, 2022 †
- Genus Lumbrerornis Bertelli et al., 2024 †
- Genus Lutavis Mayr & Kitchener, 2022 †
- Genus Oculudentavis Xing, O'Connor, Schmitz, Chiappe, McKellar, Yi & Li, 2020 †
- Genus Parvoolithus Mikhailov, 1996 †
- Genus Plagioolithus Imai & Azuma, 2015 †
- Genus Struthiolithus Brandt, 1872 †
- Genus Styloolithus Varricchio & Barta, 2014 †
- Genus Sulcitarsus Mayr & Kitchener, 2024 †
- Genus Tristratioolithus Bravo, Sevilla & Barroso-Barcenilla, 2018 †
- Genus Waltonavis Mayr & Kitchener, 2022 †
- Class Mammalia
- Class Mammaliaformes incertae sedis †
- Class Reptilia
- Genus Archaeoraptor Sloan, 1999 †
- Genus Brittagnathus Ahlberg & Clack, 2020 †
- Genus Diploradus Clack & Smithson in Clack et al., 2017 †
- Genus Mesanerpeton Smithson & Clack, 2018 †
- Genus Ossirarus Clack & Smithson in Clack et al., 2017 †
- Genus Parmastega Beznosov, Clack, Lukševičs, Ruta & Ahlberg, 2019 †
- Genus Perittodus Clack & Smithson in Clack et al., 2017 †
- Genus Sigournea Bolt & Lombard, 2006 †
- Genus Tantallognathus Chen, Alavi, Brazeau, Blom, Millward & Ahlberg, 2017 †
- Genus Tutusius Gess & Ahlberg, 2018 †
- Genus Umzantsia Gess & Ahlberg, 2018 †
- Class Acanthodii †
- Class Actinopterygii
- Class Agnatha (awaiting allocation)
- Class Cephalaspidomorphi
- Class Chondrichthyes
- Class Conodonta †
- Class Dipnoi
- Class Dipnomorpha accepted as Dipnoi
- Class Galeaspida †
- Class Gnathostomata incertae sedis †
- Class Myxini
- Class Osteichthyes (awaiting allocation)
- Class Osteichthyes incertae sedis †
- Class Ostracodermi †
- Class Pisces (awaiting allocation)
- Class Placodermi †
- Class Pteraspidomorphi †
- Class Sarcopterygii
- Class Thelodonti †
- Genus Emmonsaspis Resser & Howell, 1938 †
- Genus Harajicadectes Choo, Holland, Clement, King, Challands, Young & Long, 2024 †
- Genus Kahamachli Malkani, 2019 †
- Genus Nuucichthys Lerosey-Aubril & Ortega-Hernández, 2024 †
- Genus Rhynchocopros Hunt, Lucas & Spielmann, 2013 †
- Genus Santamariacopros Hunt, Lucas & Spielmann, 2013 †
- Genus Squirmarius McCoy, Wittry, Sadabadi & Mayer, 2023 †
- Class Chordata (awaiting allocation)
- Class Eotetrapodiformes incertae sedis
- Phylum Cnidaria
- Phylum Ctenophora
- Phylum Cycliophora
- Phylum Cycloneuralia incertae sedis
- Phylum Ecdysozoa incertae sedis †
- Phylum Echinodermata
- Phylum Entoprocta
- Phylum Gastrotricha
- Phylum Gnathostomulida
- Phylum Hemichordata
- Phylum Hyolitha †
- Phylum Kinorhyncha
- Phylum Lobopoda †
- Phylum Loricifera
- Phylum Micrognathozoa
- Phylum Mollusca
- Phylum Monoblastozoa accepted as Animalia incertae sedis
- Phylum Nematoda
- Phylum Nematomorpha
- Phylum Nemertea
- Phylum Onychophora
- Phylum Orthonectida
- Phylum Phoronida
- Phylum Placozoa
- Phylum Platyhelminthes
- Phylum Pogonophora accepted as Siboglinidae Caullery, 1914
- Phylum Porifera
- Phylum Priapula accepted as Priapulida
- Phylum Priapulida
- Phylum Problematica † accepted as Animalia incertae sedis
- Phylum Rhombozoa
- Phylum Rotifera
- Phylum Scalidophora incertae sedis
- Phylum Sipuncula
- Phylum Tardigrada
- Phylum Trace fossils †
- Phylum Vendobionta †
- Phylum Vestimentifera accepted as Siboglinidae Caullery, 1914
- Phylum Vetulicolia †
- Phylum Vinctiplicata incertae sedis †
- Phylum Xenacoelomorpha
- Genus Trilobocaris Pribyl, 1953 †
- Kingdom Archaea
- Kingdom Bacteria
- Kingdom Chromista
- Kingdom Fungi
- Kingdom Plantae
- Kingdom Protista accepted as Protozoa
- Kingdom Protozoa
- Kingdom Viruses
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