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
- 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
- Genus Acrobatornis Pacheco, Whitney & Gonzaga, 1996
- Genus Anabacerthia Lafresnaye, 1841
- Genus Anabates Temminck, 1820
- Genus Anabatozenops Burmeister, 1856 accepted as Anabazenops d'Orbigny & Lafresnaye, 1841
- Genus Anabaxenops Bonaparte, 1854 accepted as Anabazenops d'Orbigny & Lafresnaye, 1841
- Genus Anabazenops d'Orbigny & Lafresnaye, 1841
- Genus Anachilus Chapman, 1928 accepted as Simoxenops Chapman, 1937
- Genus Ancistrops Sclater, 1862
- Genus Annumbius Lafresnaye, 1841 accepted as Anumbius d'Orbigny & Lafresnaye, 1838
- Genus Antomolus Gray, 1869 accepted as Automolus Reichenbach, 1853
- Genus Anumbius d'Orbigny & Lafresnaye, 1838
- Genus Aphrastura Oberholser, 1899
- Genus Asthenes Reichenbach, 1853
- Genus Astheres Bonaparte, 1854 accepted as Asthenes Reichenbach, 1853
- Genus Automoliana Strand, 1928 accepted as Automolus Reichenbach, 1853
- Genus Automolus Reichenbach, 1853
- Genus Berlepschia Ridgway, 1887
- Genus Campylorhamphus Bertoni, 1901
- Species Campylorhamphus falcularius (Vieillot, 1823)
- Species Campylorhamphus procurvoides (Lafresnaye, 1850)
- Species Campylorhamphus pucherani (DesMurs, 1849)
- Species Campylorhamphus pusillus (Sclater, 1860)
- Species Campylorhamphus trochilirostris (Lichtenstein, 1820)
- Genus Certhiaxis Lesson, 1844
- Genus Chilia Salvadori, 1908
- Genus Cichlocolaptes Reichenbach, 1853
- Genus Cillurus Cabanis, 1844
- Genus Cinclodes Gray, 1840
- Genus Clibanornis Sclater & Salvin, 1873
- Genus Copotretis Giebel, 1872 accepted as Upucerthia Geoffroy, 1832
- Genus Coprotretis Cabanis & Heine, 1860 accepted as Upucerthia Geoffroy, 1832
- Genus Coryphistera Burmeister, 1860
- Genus Cranioleuca Reichenbach, 1853
- Genus Dacryophorus Bonaparte, 1854 accepted as Lepidocolaptes Reichenbach, 1853
- Genus Dacryophorus Bonaparte, 1854, nom. nud. accepted as Lepidocolaptes Reichenbach, 1853
- Genus Deconychra accepted as Deconychura Cherrie, 1891
- Genus Deconychura Cherrie, 1891
- Genus Dendrexetastes Eyton in Jardine, 1851
- Genus Dendrocalaptes Boie, 1822 accepted as Dendrocolaptes Hermann, 1804
- Genus Dendrocaleptes Schinz, 1832 accepted as Dendrocolaptes Hermann, 1804
- Genus Dendrocichla Sharpe, 1901 accepted as Dendrocincla Gray, 1840
- Genus Dendrocincla Gray, 1840
- Genus Dendrocolaptes Hermann, 1804
- Genus Dendroxetastes Bonaparte, 1854 accepted as Dendrexetastes Eyton in Jardine, 1851
- Genus Drymornis Eyton in Jardine, 1853
- Genus Enicornis Gray, 1840
- Genus Eremobius Gould, 1839
- Genus Ericornis Giebel, 1874 accepted as Eremobius Gould, 1839
- Genus Figulus Spix, 1824
- Genus Furnaris accepted as Furnarius Vieillot, 1816
- Genus Furnarius Vieillot, 1816
- Genus Geobama Sclater, 1866
- Genus Geobamon Burmeister, 1860
- Genus Geobates Swainson, 1837
- Genus Geocerthia Chesser & Claramunt in Chesser, Claramunt, Derryberry & Brumfield, 2009
- Genus Geocitta Sclater, 1862 accepted as Geositta Swainson, 1837
- Genus Geositta Swainson, 1837
- Genus Glyphorhynchus Anon., 1832 accepted as Glyphorynchus Wied, 1831
- Genus Glyphorhynphus Fitzinger, 1863 accepted as Glyphorynchus Wied, 1831
- Genus Glyphorynchus Wied, 1831
- Genus Gyalophylax Peters, 1950
- Genus Heliobletus Reichenbach, 1853
- Genus Hellmayrea Sztolcman, 1926
- Genus Henicornis Agassiz, 1846 accepted as Eremobius Gould, 1839
- Genus Huppucerthia Agassiz, 1845 accepted as Upucerthia Geoffroy, 1832
- Genus Hylexetastes Sclater, 1889
- Genus Hylocryptus Chapman, 1919
- Genus Hyloctistes Ridgway, 1909
- Genus Ipoborus Cabanis & Heine, 1860 accepted as Automolus Reichenbach, 1853
- Genus Lepidocolaptes Reichenbach, 1853
- Genus Leptastenura Philippi, 1896 accepted as Leptasthenura Reichenbach, 1853
- Genus Leptasthenura Reichenbach, 1853
- Genus Leptostenura Bonaparte, 1854 accepted as Leptasthenura Reichenbach, 1853
- Genus Leptoxyura Reichenbach, 1853
- Genus Limnoctites Hellmayr, 1925
- Genus Limnornis Gould, 1839
- Genus Lochmia Swainson, 1837 accepted as Lochmias Swainson, 1827
- Genus Lochmias Swainson, 1827
- Genus Lymnornis Gray, 1871 accepted as Limnornis Gould, 1839
- Genus Margarornis Reichenbach, 1853
- Genus Megaxenops Reiser, 1905
- Genus Metopothrix Sclater & Salvin, 1866
- Genus Nasica Lesson, 1830
- Genus Neohellmayria Richmond, 1927
- Genus Neophilydor Sangster, Harvey, Gaudin & Claramunt, 2023
- Genus Ochethiorhynchus Cabanis in Tschudi, 1846
- Genus Ochetorhynchus Meyen, 1834
- Genus Oreophylax Hellmayr, 1925
- Genus Oripne Gray, 1869 accepted as Pseudocolaptes Reichenbach, 1853
- Genus Otipne Cabanis & Heine, 1860 accepted as Pseudocolaptes Reichenbach, 1853
- Genus Oxiurus Lesson, 1842 accepted as Aphrastura Oberholser, 1899
- Genus Oxyurus Swainson, 1827 accepted as Aphrastura Oberholser, 1899
- Genus Phacellodomus Reichenbach, 1853
- Genus Phacellodromus Bonaparte, 1854 accepted as Phacellodomus Reichenbach, 1853
- Genus Phacelodomus Salvin, 1882 accepted as Phacellodomus Reichenbach, 1853
- Genus Philydor Spix, 1824
- Genus Phleocryptes Cabanis & Heine, 1860
- Genus Phloeocryptes Sclater & Salvin, 1873 accepted as Phleocryptes Cabanis & Heine, 1860
- Genus Phylidor Lesson, 1830 accepted as Philydor Spix, 1824
- Genus Pigarrhicus Des Murs in Chenu, 1853 accepted as Pygarrhichas Burmeister, 1837
- Genus Placellodomus Sclater & Salvin, 1868 accepted as Phacellodomus Reichenbach, 1853
- Genus Poecilurus Todd, 1917
- Genus Premnoplex Cherrie, 1891
- Genus Premnornis Ridgway, 1909
- Genus Pseudasthenes Derryberry, Claramunt, O'Quin, Aleixo, Chesser, Remsen & Brumfield, 2010
- Genus Pseudocolaptes Reichenbach, 1853
- Genus Pseudoscisura Fitzinger, 1863 accepted as Pseudoseisura Reichenbach, 1853
- Genus Pseudoseisura Reichenbach, 1853
- Genus Pseudoseisuropsis Noriega, 1991
- Genus Pseudosizura Sharpe, 1901 accepted as Pseudoseisura Reichenbach, 1853
- Genus Pygarhicus Hartlaub, 1853 accepted as Pygarrhichas Burmeister, 1837
- Genus Pygarrhichas Burmeister, 1837
- Genus Pygarrhichus Cabanis, 1847 accepted as Pygarrhichas Burmeister, 1837
- Genus Pygarrhicus Bonaparte, 1850 accepted as Pygarrhichas Burmeister, 1837
- Genus Pygarrichus Lichtenstein, 1854 accepted as Pygarrhichas Burmeister, 1837
- Genus Roraimia Chapman, 1929
- Genus Scelurus Burmeister, 1856 accepted as Sclerurus Swainson, 1827
- Genus Schizoeaca Cabanis, 1873
- Genus Schizura Cabanis, 1847 accepted as Sylviorthorhynchus Gay, 1845
- Genus Schoeniophylax Ridgway, 1909
- Genus Sclerurus Swainson, 1827
- Genus Simoxenops Chapman, 1937
- Genus Siptornis Reichenbach, 1853
- Genus Siptornopsis Cory, 1919
- Genus Sittamosus Lesson, 1831 accepted as Sittasomus Swainson, 1827
- Genus Sittasomus Swainson, 1827
- Genus Sittosomus Cabanis & Heine, 1860 accepted as Sittasomus Swainson, 1827
- Genus Spartonoica Peters, 1950
- Genus Sphenopyga Cabanis, 1847
- Genus Sylviorthorhynchus Gay, 1845
- Genus Synalaxis Boie, 1826 accepted as Synallaxis Vieillot, 1819
- Genus Synallaxis Vieillot, 1819
- Genus Syndactyla Reichenbach, 1853
- Genus Synnalaxis Kittlitz, 1830 accepted as Synallaxis Vieillot, 1819
- Genus Tarphonomus Chesser & Brumfield, 2007
- Genus Thripadectes Sclater, 1862
- Genus Thripophaga Cabanis, 1847
- Genus Tinactor Wied, 1831
- Genus Tripophaga Gray, 1849 accepted as Thripophaga Cabanis, 1847
- Genus Uppucerthia Geoffroy & d'Orbigny in d'Orbigny & Lafresnaye, 1838 accepted as Upucerthia Geoffroy, 1832
- Genus Upucerthia Geoffroy, 1832
- Genus Upupicerthia Agassiz, 1846 accepted as Upucerthia Geoffroy, 1832
- Genus Upupucerthia Selys, 1842 accepted as Upucerthia Geoffroy, 1832
- Genus Xenerpestes Berlepsch, 1886
- Genus Xenopis Troschel, Stein & Wiegmann, 1839 accepted as Xenops Illiger, 1811
- Genus Xenops Illiger, 1811
- Genus Xiphocolaptes Lesson, 1840
- Genus Xithocolaptes Gray, 1849 accepted as Xiphocolaptes Lesson, 1840
- Genus Zenops Swainson, 1836 accepted as Xenops Illiger, 1811
- 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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