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
- Class Mammalia
- Subclass Prototheria
- Subclass Theria
- Infraclass Eutheria
- Order Afrosoricida
- Order Amphitheriida †
- Order Anagalida †
- Order Arctostylopida †
- Order Artiodactyla
- Order Asioryctitheria †
- Order Astrapotheria †
- Order Bellua accepted as Perissodactyla
- Order Bibymalagasia †
- Order Carnivora
- Order Carnivoramorpha incertae sedis †
- Order Cetacea
- Order Chiroptera
- Family Aegyptonycteridae Simmons, Seiffert & Gunnell, 2016 †
- Family Archaeonycteridae †
- Family Archaeonycterididae Revilliod, 1917 † accepted as Archaeonycteridae †
- Family Chiroptera (awaiting allocation)
- Family Chiroptera incertae sedis †
- Family Cistugidae Lack et al., 2010
- Family Craseonycteridae Hill, 1974
- Family Emballonuridae Dobson, 1875
- Family Furipteridae Gray, 1866
- Family Hassianycterididae Habersetzer & Storch, 1987 †
- Family Hipposideridae Lydekker, 1891
- Family Icaronycteridae Jepsen, 1966 †
- Family Macroglossidae Gray, 1866 accepted as Pteropodidae Gray, 1821
- Family Megadermatidae Allen, 1864
- Family Miniopteridae Dobson, 1875
- Family Mixopterygidae Maitre, 2008 †
- Family Molossidae Gervais, 1856
- Family Mormoopidae de Saussure, 1860
- Family Mystacinidae Dobson, 1875
- Family Myzopodidae Milne-Edwards & Grandidier, 1878
- Family Natalidae Gray, 1866
- Family Noctilionidae Gray, 1821
- Family Noctilionoidea incertae sedis
- Family Nycteridae Van der Hoeven, 1855
- Family Onychonycteridae Simmons, Seymour, Habersetzer & Gunnell, 2008 †
- Family Palaeochiropterygidae Revilliod, 1917 †
- Family Philisidae †
- Family Phyllostomatidae Coues & Yarrow, 1875 accepted as Phyllostomidae Gray, 1825
- Family Phyllostomidae Gray, 1825
- Family Pteropidae Gray, 1821 accepted as Pteropodidae Gray, 1821
- Family Pteropodidae Gray, 1821
- Family Rhinolophidae Gray, 1825
- Family Rhinopomatidae Bonaparte, 1838
- Family Tanzanycterididae †
- Family Thyropteridae Miller, 1907
- Family Vespertilionidae Gray, 1821
- Genus Adelonycteris Allen, 1892 accepted as Eptesicus Rafinesque, 1820
- Genus Aeorestes Fitzinger, 1870 accepted as Myotis Kaup, 1829
- Genus Afronycteris Monadjem, Patterson & Demos in Monadjem et al., 2021
- Genus Afropipistrellus Thorn, Kock & Cusin, 2007 accepted as Pipistrellus Kaup, 1829
- Genus Alionoctula Kruskop, Solovyeva & Kaznadzey, 2018 accepted as Pipistrellus Kaup, 1829
- Genus Alobus Peters, 1867 accepted as Pipistrellus Kaup, 1829
- Genus Amblyotis Kolenati, 1858 accepted as Eptesicus Rafinesque, 1820
- Genus Anamygdon Troughton, 1929 accepted as Myotis Kaup, 1829
- Genus Ancenycteris Sutton & Genoways, 1974 †
- Genus Antrozous Allen, 1862
- Genus Anzanycteris White, 1969 †
- Genus Arielulus Hill & Harrison, 1986
- Genus Aristippe Kolenati, 1863 accepted as Vespertilio Linnaeus, 1758
- Genus Artrozous Gray, 1866 accepted as Antrozous Allen, 1862
- Genus Atalapha Rafinesque, 1814
- Genus Atalapha Peters, 1871 accepted as Lasiurus Gray, 1831
- Genus Atalepha Burnett, 1829
- Genus Atelapha Leach, 1820
- Genus Attalepharca Menu, 1987 accepted as Pipistrellus Kaup, 1829
- Genus Aussipterus Kretzoi & Kretzoi, 2000 † accepted as Scoteanax Troughton, 1943
- Genus Baeodon Miller, 1906 accepted as Rhogeessa Allen, 1866
- Genus Barbastella Gray, 1821
- Genus Barbastellus Gray, 1825 accepted as Nyctophilus Leach, 1821
- Genus Bauerus Van Gelder, 1959
- Genus Brachyotis Kolenati, 1856 accepted as Myotis Kaup, 1829
- Genus Brachyotus Kolenati, 1856 accepted as Myotis Kaup, 1829
- Genus Caelano Leach in Gray, 1825
- Genus Capaccinus Bonaparte, 1841 accepted as Myotis Kaup, 1829
- Genus Cassistrellus Ruedi, Eger, Lim & Csorba, 2018
- Genus Cateorus Kolenati, 1856 accepted as Eptesicus Rafinesque, 1820
- Genus Cerivoula Blanford, 1891 accepted as Kerivoula Gray, 1842
- Genus Chalinolobus Peters, 1866
- Genus Chamtwaria Butler, 1984 †
- Genus Chrysopteron Jentink, 1910 accepted as Myotis Kaup, 1829
- Genus Cnephaeus Kaup, 1829 accepted as Eptesicus Rafinesque, 1820
- Genus Comastes Fitzinger, 1870 accepted as Myotis Kaup, 1829
- Genus Corinorhinus Dobson, 1876 accepted as Corynorhinus Allen, 1865
- Genus Corynorhinus Allen, 1865
- Genus Dasypterus Peters, 1871
- Genus Dasypterus H. Allen, 1894 accepted as Lasiurus Gray, 1831
- Genus Dichromyotis Bianchi, 1924 accepted as Myotis Kaup, 1829
- Genus Discopus Osgood, 1932 accepted as Eudiscopus Conisbee, 1953
- Genus Eptenonnus Rosina & Semenov, 2012 †
- Genus Eptesicops Roberts, 1926 accepted as Pipistrellus Kaup, 1829
- Genus Eptesicus Rafinesque, 1820
- Genus Eptesius
- Genus Euderma Allen, 1892
- Genus Eudiscopus Conisbee, 1953
- Genus Eudmna accepted as Euderma Allen, 1892
- Genus Euvespertilio Acloque, 1899 accepted as Myotis Kaup, 1829
- Genus Euvesperugo Acloque, 1899 accepted as Pipistrellus Kaup, 1829
- Genus Exochurus Fitzinger, 1870 accepted as Myotis Kaup, 1829
- Genus Falsistrellus Troughton, 1943
- Genus Glauconycteris Dobson, 1875
- Genus Glischropus Dobson, 1875
- Genus Hanakia Horáček, 2001 †
- Genus Harpiocephalus Gray, 1842
- Genus Harpiola Thomas, 1915 accepted as Murina Gray, 1842
- Genus Harpyiocephalus Agassiz, 1846 accepted as Harpiocephalus Gray, 1842
- Genus Hesperomyotis Cabrera, 1958 accepted as Myotis Kaup, 1829
- Genus Hesperoptenus Peters, 1869
- Genus Histiotus Gervais in Laporte, 1855
- Genus Hypsugo Kolenati, 1856
- Genus Ia Thomas, 1902
- Genus Idionycteris Anthony, 1923
- Species Idionycteris phyllotis (G.M. Allen, 1916)
- Genus Isotus Kolenati, 1856 accepted as Myotis Kaup, 1829
- Genus Karstala Czaplewski & Morgan, 2001 †
- Genus Kehelvoulha Jentink, 1904 accepted as Kerivoula Gray, 1842
- Genus Kerivoula Gray, 1842
- Genus Kerivoulha Kelaart, 1852 accepted as Kerivoula Gray, 1842
- Genus Khonsunycteris Gunnell, Simons & Seiffert, 2008 †
- Genus Kirivoula Gervais, 1849 accepted as Kerivoula Gray, 1842
- Genus Laephotis Thomas, 1901
- Genus Lamingtona McKean & Calaby, 1968 accepted as Nyctophilus Leach, 1821
- Genus Lasionycteris Peters, 1865
- Genus Lasiurus Gray, 1831
- Genus Leuconoe Boie, 1830 accepted as Myotis Kaup, 1829
- Genus Macrotus Leach, 1816 accepted as Plecotus É. Geoffroy Saint-Hilaire, 1818
- Genus Madaeteus Burnett, 1829
- Genus Madataeus Leach, 1821
- Genus Marsipolaemus Peters, 1872 accepted as Vespertilio Linnaeus, 1758
- Genus Medateus Gray, 1825
- Genus Megapipistrellus Bianchi, 1924 accepted as Myotis Kaup, 1829
- Genus Meteorus Kolenati, 1856 accepted as Vespertilio Linnaeus, 1758
- Genus Milithronycteris Hill, 1976 accepted as Hesperoptenus Peters, 1869
- Genus Mimetillus Thomas, 1904
- Genus Miomyotis Lawrence, 1943 †
- Genus Mirostrellus Görföl, Kruskop, Vuong, Estók, Nguyen & Csorba, 2020
- Genus Murina Gray, 1842
- Genus Myotis Kaup, 1829
- Genus Myotus Kolenati, 1856 accepted as Myotis Kaup, 1829
- Genus Nannugo Kolenati, 1856 accepted as Pipistrellus Kaup, 1829
- Genus Neoromicia Roberts, 1926
- Genus Nicticeius Pöppig, 1830 accepted as Nycticeius Rafinesque, 1819
- Genus Nicticejus Rüppell, 1842 accepted as Nycticeius Rafinesque, 1819
- Genus Niumbaha Reeder, Helgen, Vodzak, Lunde & Ejotre, 2013
- Genus Noctilinia Hodgson, 1847 accepted as Nyctalus Bowdich, 1825
- Genus Noctula Bonaparte, 1837 accepted as Eptesicus Rafinesque, 1820
- Genus Noctulina Gray, 1843 accepted as Nyctalus Bowdich, 1825
- Genus Noctulinia Gray, 1842 accepted as Nyctalus Bowdich, 1825
- Genus Nyctactes Kaup, 1829 accepted as Myotis Kaup, 1829
- Genus Nyctalus Bowdich, 1825
- Genus Nyctalus Lesson, 1842
- Genus Nycterikaupius Menu, 1987
- Genus Nycteris Borkhausen, 1797 accepted as Lasiurus Gray, 1831
- Genus Nycterobius Revilliod, 1926 † accepted as Stehlinia Revilliod, 1919 †
- Genus Nycticea Le Conte, 1831 accepted as Nycticeius Rafinesque, 1819
- Genus Nycticeinops Hill & Harrison, 1986
- Genus Nycticeius Rafinesque, 1819
- Genus Nycticejus Temminck, 1827 accepted as Nycticeius Rafinesque, 1819
- Genus Nycticeus Lesson, 1827 accepted as Nycticeius Rafinesque, 1819
- Genus Nycticeyx Wagler, 1830 accepted as Nycticeius Rafinesque, 1819
- Genus Nyctiptenus Fitzinger, 1870 accepted as Eptesicus Rafinesque, 1820
- Genus Nyctolophus Brookes, 1828 accepted as Nyctophilus Leach, 1821
- Genus Nyctophilus Leach, 1821
- Genus Nyctophylax Fitzinger, 1860 accepted as Kerivoula Gray, 1842
- Genus Nyctophyllus Cuvier, 1829 accepted as Nyctophilus Leach, 1821
- Genus Nystactes Kaup, 1829 accepted as Myotis Kaup, 1829
- Genus Ocypetes Lesson, 1842 accepted as Murina Gray, 1842
- Genus Oligomyotis Galbreath, 1962 †
- Genus Oligotomus Iredale, 1937 † accepted as Scoteanax Troughton, 1943
- Genus Otonycteris Peters, 1859
- Genus Pachyomus Gray, 1866 accepted as Eptesicus Rafinesque, 1820
- Genus Pachyotus Gray, 1831 accepted as Scotophilus Leach, 1821
- Genus Paleptesicus Zapfe, 1970 †
- Genus Panugo Kolenati, 1856 accepted as Nyctalus Bowdich, 1825
- Genus Parahypsugo Hutterer, Decher, Monadjem & Astrin, 2019
- Genus Paramyotis Bianchi, 1924 accepted as Myotis Kaup, 1829
- Genus Parascotomanes Bourret, 1942 accepted as Ia Thomas, 1902
- Genus Parastrellus Hoofer, Van Den Bussche & Horacek, 2006 accepted as Hypsugo Kolenati, 1856
- Genus Pareptesicus Bianchi, 1924 accepted as Eptesicus Rafinesque, 1820
- Genus Perimyotis Menu, 1984 accepted as Pipistrellus Kaup, 1829
- Genus Pharotis Thomas, 1914
- Genus Philetor Thomas, 1902
- Genus Phoniscus Miller, 1905
- Genus Pipistrellus Kaup, 1829
- Genus Pizonyx Miller, 1906 accepted as Myotis Kaup, 1829
- Genus Plecotus É. Geoffroy Saint-Hilaire, 1818
- Genus Pleistomyotis Kuramoto & Yoon in Yoon, Kuramoto & Uchida, 1984 †
- Genus Plionycteris Lindsay & Jacobs, 1985 †
- Genus Potamonycteris Czaplewski, 1991 †
- Genus Premonycteris Hand, Sigé, Archer & Black, 2016 †
- Genus Pseudoromicia Monadjem, Patterson, Webala & Demos in Monadjem et al., 2021
- Genus Pternopterus Peters, 1867 accepted as Myotis Kaup, 1829
- Genus Pterygistes Kaup, 1829 accepted as Nyctalus Bowdich, 1825
- Genus Quinetia Horáček, 2001 †
- Genus Registrellus Troughton, 1943 accepted as Vespadelus Troughton, 1943
- Genus Rhinopterus Miller, 1906 accepted as Eptesicus Rafinesque, 1820
- Genus Rhogeessa Allen, 1866
- Genus Rhogeëssa Allen, 1866 accepted as Rhogeessa Allen, 1866
- Genus Rhogoesa Alston, 1879 accepted as Rhogeessa Allen, 1866
- Genus Rhogoësa Alston, 1879 accepted as Rhogeessa Allen, 1866
- Genus Rhyneptesicus Bianchi, 1924 accepted as Eptesicus Rafinesque, 1820
- Genus Rickettia Bianchi, 1924 accepted as Myotis Kaup, 1829
- Genus Romicia Gray, 1838 accepted as Pipistrellus Kaup, 1829
- Genus Romicius Blyth, 1840 accepted as Pipistrellus Kaup, 1829
- Genus Samonycteris Revilliod, 1919 †
- Genus Scabrifer Allen, 1908 accepted as Eptesicus Rafinesque, 1820
- Genus Scotaecus Thomas, 1909 accepted as Scotoecus Thomas, 1901
- Genus Scoteanax Troughton, 1943
- Genus Scoteinus Dobson, 1875 accepted as Scotomanes Dobson, 1875
- Genus Scotoecus Thomas, 1901
- Genus Scotomanes Dobson, 1875
- Genus Scotophilisis Horacek, Fejfar & Hulva, 2006 †
- Genus Scotophillus Cuvier, 1829 accepted as Scotophilus Leach, 1821
- Genus Scotophilus Leach, 1821
- Genus Scotophylus Gray, 1825 accepted as Scotophilus Leach, 1821
- Genus Scotorepens Troughton, 1943
- Genus Scotozous Dobson, 1875
- Genus Scutophilus Tubangin, 1928 accepted as Scotophilus Leach, 1821
- Genus Selysius Bonaparte, 1841 accepted as Myotis Kaup, 1829
- Genus Shanwangia Yang, 1977 †
- Genus Simonycteris Stirton, 1931 †
- Genus Sonor Czaplewski, Morgan, Emry, Gignac & O'Brien, 2022 †
- Genus Stehlinia Revilliod, 1919 †
- Genus Suaptenos Lawrence, 1943 †
- Genus Submyotodon Ziegler, 2003
- Genus Synotis Gloger, 1841 accepted as Barbastella Gray, 1821
- Genus Synotus Keyserling & Blasius, 1839 accepted as Barbastella Gray, 1821
- Genus Thainycteris Kock & Storch, 1996 accepted as Arielulus Hill & Harrison, 1986
- Genus Tralatitius Gray, 1866 accepted as Myotis Kaup, 1829
- Genus Tralatitus Gervais, 1849 accepted as Myotis Kaup, 1829
- Genus Trilatitus Gray, 1842 accepted as Myotis Kaup, 1829
- Genus Tuitatus Kishida & Mori, 1931 accepted as Eptesicus Rafinesque, 1820
- Genus Tylonycteris Peters, 1872
- Genus Vansonia Roberts, 1946 accepted as Pipistrellus Kaup, 1829
- Genus Vespadelus Iredale & Troughton, 1934 accepted as Vespadelus Troughton, 1943
- Genus Vespadelus Troughton, 1943
- Genus Vesperides Coues, 1875 accepted as Lasionycteris Peters, 1865
- Genus Vespertilio Linnaeus, 1758
- Genus Vesperugo Keyserling & Blasius, 1830 accepted as Vespertilio Linnaeus, 1758
- Genus Vesperus Keyserling & Blasius, 1839 accepted as Vespertilio Linnaeus, 1758
- Genus Australonycteris Hand, Novacek, Godthelp & Archer, 1994 †
- Genus Chadronycteris Ostrander, 1983 †
- Order Cimolesta †
- Order Cingulata
- Order Condylarthra †
- Order Creodonta †
- Order Dermoptera
- Order Desmostylia †
- Order Dinocerata †
- Order Edentata accepted as Eutheria
- Order Embrithopoda †
- Order Erinaceomorpha
- Order Eulipotyphla
- Order Eutheria (awaiting allocation)
- Order Hyracoidea
- Order Insectivora accepted as Eutheria
- Order Lagomorpha
- Order Leptictida †
- Order Lipotyphla † accepted as Eulipotyphla
- Order Litopterna †
- Order Macroscelidea
- Order Mesonychia † accepted as Mesonychia †
- Order Mesonychia †
- Order Mimotonida †
- Order Mixodontia †
- Order Notopterna † accepted as Litopterna †
- Order Notoungulata †
- Order Pantodonta † accepted as Cimolesta †
- Order Pantolesta † accepted as Cimolesta †
- Order Perissodactyla
- Order Pholidota
- Order Pilosa
- Order Primates
- Order Proboscidea
- Order Procreodi †
- Order Proteutheria † accepted as Eutheria
- Order Ptolemaiida †
- Order Pyrotheria †
- Order Rodentia
- Order Scandentia
- Order Simplicidentata incertae sedis †
- Order Sirenia
- Order Soricomorpha
- Order Taeniodonta † accepted as Cimolesta †
- Order Tillodontia † accepted as Cimolesta †
- Order Tubulidentata
- Order Xenungulata †
- Family Acreodi incertae sedis †
- Family Endotheriidae Shikama, 1947 †
- Family Heterosoricidae Viret & Zapfe, 1951 †
- Family Horolodectidae Scott, 2019 †
- Family Miacidae Cope, 1880 †
- Family Nesophontidae
- Family Ocepeiidae Gheerbrant in Gheerbrant et al., 2014 †
- Family Otlestidae Nessov, 1985 † accepted as Eutheria
- Family Soricomorpha incertae sedis
- Family Sororyctidae Gingerich, Arif, Hussain & Abbas, 1998 †
- Family Tenrecoidea incertae sedis
- Family Tenrecomorpha incertae sedis
- Family Vastanidae Bajpai, Kapur, Das, Tiwari, Saravanan & Sharma, 2005 †
- Family Zhelestidae Nessov, 1990 †
- Genus Acristatherium Hu, Meng, Li & Wang, 2010 †
- Genus Adrastotherium Ameghino, 1887 †
- Genus Akenodon Aymard, 1856 †
- Genus Bayshinoryctes Lopatin & Averianov, 2023 †
- Genus Beleutinus Bazhanov, 1972 †
- Genus Bobolestes Nessov, 1985 †
- Genus Ceruttia Tomiya, 2013 †
- Genus Cokotherium Wang, Hoffmann, Wang & Wang, 2022 †
- Genus Dehnaripus Abbassi, Salehi Tinooni, Ghorbani Dehnavi, Shakeri & Eshaghi, 2024 †
- Genus Durlstodon Sweetman, Smith & Martill, 2017 †
- Genus Durlstotherium Sweetman, Smith & Martill, 2017 †
- Genus Eutrochodon Roth, 1903 †
- Genus Ganungulatum Ting, Meng, Li, Wang, Tong, Schiebout, Koch, Clyde & Bowen, 2007 †
- Genus Hyotheridium Gregory & Simpson, 1926 †
- Genus Idiogenomys Ostrander, 1983 †
- Genus Indoclemensia Wilson Mantilla et al., 2022 †
- Genus Juramaia Luo, Yuan, Meng & Ji, 2011 †
- Genus Microtherulum Wang & Wang, 2023 †
- Genus Montanalestes Cifelli, 1999 †
- Genus Moropopus Abbassi, Salehi Tinooni, Ghorbani Dehnavi, Shakeri & Eshaghi, 2024 †
- Genus Murtoilestes Averianov & Skutschus, 2001 †
- Genus Ndamathaia Jacobs, Anyonge & Barry, 1987 †
- Genus Nosella Peláez-Campomanes in Lopez-Martinez & Pelaez-Campomanes, 1999 †
- Genus Obtususdon Xu, 1977 †
- Genus Otlestes Nessov, 1985 † accepted as Bobolestes Nessov, 1985 †
- Genus Pahelia Zack, Rose, Holbrook, Kumar, Rana & Smith, 2021 †
- Genus Prokennalestes Kielan-Jaworowska & Dashzeveg, 1989 †
- Genus Prozalambdalestes Trofimov in Belyaeva, Trofimov & Reshetov, 1974 † accepted as Prokennalestes Kielan-Jaworowska & Dashzeveg, 1989 †
- Genus Radinskya McKenna, Minchen, Ting & Luo, 1989 †
- Genus Sazlestes Nessov, 1997 †
- Genus Sinomylus McKenna & Meng, 2001 †
- Genus Talquinodus Kramarz, Bellosi, Bond, Forasiepi, Gaillard & Krause, 2024 †
- Genus Thoracotherion Gray, 1869 †
- Genus Veratalpa Ameghino, 1905 †
- Genus Walshius Tomiya, 2013 †
- Genus Wania Wang, 1995 †
- Genus Wanotherium Tang & Yan, 1976 †
- Infraclass Marsupialia accepted as Metatheria
- Infraclass Metatheria
- Infraclass Placentalia accepted as Eutheria
- Order Dryolestida †
- Order Eupantotheria † accepted as Dryolestida †
- Order Spalacotherioidea † accepted as Symmetrodonta †
- Order Symmetrodonta †
- Order Uranotheria accepted as Eutheria
- Family Holoclemensiidae Aplin & Archer, 1987 †
- Family Kermackiidae Butler, 1978 †
- Family Picopsidae Fox, 1980 †
- Family Plicatodontidae Ameghino, 1904 †
- Family Potamotelsidae Nessov, 1987 †
- Genus Anisorhizus Ameghino, 1902 †
- Genus Chunnelodon Ensom & Sigogneau-Russell, 1998 †
- Genus Dakotadens Eaton, 1993 †
- Genus Magnimus Sigogneau-Russell, 1999 †
- Genus Minimus Sigogneau-Russell, 1999 †
- Genus Paleomolops Cifelli, 1994 †
- Genus Patagomaia Chimento, Agnolín, García-Marsà, Manabe, Tsuihiji & Novas, 2024 †
- Subclass Theriiformes †
- Order Mammalia (awaiting allocation)
- Order Mammalia incertae sedis
- Family Meridiolestida incertae sedis †
- Genus Bulatia Gabunia & Shevyreva, 1994 †
- Genus Eomaia Ji, Luo, Yuan, Wible, Zhang & Georgi, 2002 †
- Genus Florentinoameghinia Simpson, 1932 †
- Genus Hypomylos Sigogneau-Russell, 1992 †
- Genus Tribotherium Sigogneau-Russell, 1991 †
- Genus Zygiocuspis Cifelli, 1990 †
- 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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