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
- 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
- Family Abrocomidae Miller & Gidley, 1918
- Family Acaremyidae Wood, 1949 †
- Family Adelphomyidae †
- Family Agoutidae Gray, 1821 accepted as Cuniculidae Miller & Gidley, 1918
- Family Alagomyidae Dashzeveg, 1990 †
- Family Allomyidae Marsh, 1877 †
- Family Anomalomyidae Schaub, 1925 †
- Family Anomaluridae Gervais, 1849
- Family Aplodontidae Brandt, 1855 accepted as Aplodontiidae Brandt, 1855
- Family Aplodontiidae Brandt, 1855
- Family Archetypomyidae Meng, Li, Ni, Wang & Beard, 2007 †
- Family Armintomyidae Dawson et al., 1990 †
- Family Arvicolidae Gray, 1821 accepted as Cricetidae Fischer von Waldheim, 1817
- Family Aspalacidae Gray, 1825 accepted as Spalacidae Gray, 1821
- Family Bathyergidae Waterhouse, 1841
- Family Bathyergoididae †
- Family Calomyscidae Vorontsov & Potapova, 1979
- Family Capromyidae Smith, 1842
- Family Castoridae Gray, 1821
- Family Caviidae Waterhouse, 1839
- Family Cavioidea incertae sedis
- Family Caviomorpha (awaiting allocation)
- Family Caviomorpha incertae sedis
- Family Cephalomyidae Ameghino, 1897 †
- Family Chapattimyidae Hussain et al., 1978 †
- Family Chinchillidae Bennett, 1833
- Family Chinchilloidea incertae sedis
- Family Cocomyidae de Bruijn et al., 1982 †
- Family Cricetidae Fischer von Waldheim, 1817
- Family Ctenodactylidae Zittel, 1893
- Family Ctenodactyloidea incertae sedis †
- Family Ctenomyidae Lesson, 1842
- Family Cuniculidae Miller & Gidley, 1918
- Family Cylindrodontidae Miller & Gidley, 1918 †
- Family Dasyproctidae Gray, 1825
- Family Diamantomyidae Schaub, 1958 †
- Family Diatomyidae Mein & Ginsburg, 1997
- Family Dinomyidae Peters, 1873
- Family Dipodidae Waterhouse, 1842
- Family Distylomyidae Wang, 1988 † accepted as Ctenodactylidae Zittel, 1893
- Family Echimyidae Gray, 1825
- Family Echymyidae Gray, 1825 accepted as Echimyidae Gray, 1825
- Family Eocardiidae Ameghino, 1891 †
- Family Eomyidae Winge, 1887 †
- Family Erethizontidae Bonaparte, 1845
- Family Erethizontoidea incertae sedis †
- Family Eutypomyidae Miller & Gidley, 1918 †
- Family Florentiamyidae Wood, 1936 †
- Family Gaudeamuridae Sallam, Seiffert & Simons, 2011 †
- Family Geomorpha incertae sedis †
- Family Geomyidae Bonaparte, 1845
- Genus Akmaiomys Reeder, 1960 † accepted as Proheteromys Wood, 1933 †
- Genus Ascomys Lichtenstein, 1825 accepted as Geomys Rafinesque, 1817
- Genus Craterogeomys Allen, 1895 accepted as Cratogeomys Merriam, 1895
- Genus Cratogeomys Merriam, 1895
- Genus Cupidinimus Wood, 1935 †
- Genus Dikkomys Wood, 1936 †
- Genus Diplolophus Troxell, 1923 †
- Genus Diplostoma Rafinesque, 1817 accepted as Geomys Rafinesque, 1817
- Genus Diprionomys Kellogg, 1910 †
- Genus Endoptychus Dalton, 1882 † accepted as Entoptychus Cope, 1878 †
- Genus Entoptychus Cope, 1878 †
- Genus Eodipodomys Voorhies, 1975 †
- Genus Geomys Rafinesque, 1817
- Genus Gregorymys Wood, 1936 †
- Genus Gygogeomys Allen, 1895 accepted as Zygogeomys Merriam, 1895
- Genus Harrymys Munthe, 1988 †
- Genus Heliscomys Cope, 1873 †
- Genus Heterogeomys Merriam, 1895 accepted as Orthogeomys Merriam, 1895
- Genus Lignimus Storer, 1970 †
- Genus Macrogeomys Merriam, 1895 accepted as Orthogeomys Merriam, 1895
- Genus Mamgeomyscus Herrera, 1899 accepted as Geomys Rafinesque, 1817
- Genus Megascapheus Elliot, 1903 accepted as Thomomys Wied, 1839
- Genus Mojavemys †
- Genus Mookomys Wood, 1931 †
- Genus Nerterogeomys Gazin, 1942 †
- Genus Neterogeomys Gazin, 1942 accepted as Geomys Rafinesque, 1817
- Genus Oregonomys Martin, 1984 †
- Genus Orthogeomys Merriam, 1895
- Genus Pappogeomys Merriam, 1895
- Species Pappogeomys alcorni Russell, 1957
- Species Pappogeomys bulleri (Thomas, 1892)
- Species Pappogeomys castanops (Baird, 1852)
- Species Pappogeomys fumosus (Merriam, 1892)
- Species Pappogeomys gymnurus (Merriam, 1892)
- Species Pappogeomys merriami (Thomas, 1893)
- Species Pappogeomys neglectus (Merriam, 1902)
- Species Pappogeomys tylorhinus (Merriam, 1895)
- Species Pappogeomys zinseri (Goldman, 1939)
- Genus Parageomys Hibbard, 1944 † accepted as Geomys Rafinesque, 1817
- Genus Parapliosaccomys Shotwell, 1967 †
- Genus Peridiomys Matthew, 1924 †
- Genus Phelosaccomys Korth & Reynolds, 1994 †
- Genus Plesiothomomys Gidley & Gazin, 1933 accepted as Thomomys Wied, 1839
- Genus Pleurolicus Cope, 1878 †
- Genus Pliogeomys Hibbard, 1954 †
- Genus Pliosaccomys †
- Genus Prodipodomys Hibbard, 1939 †
- Genus Progeomys Dalquest, 1983 accepted as Geomys Rafinesque, 1817
- Genus Proheteromys Wood, 1933 †
- Genus Prothomomys May, Woodburne, Lindsay, Albright, Sarna-Wojcicki, Wan & Wahl, 2011 †
- Genus Pseudostoma Say in Long, 1823 accepted as Geomys Rafinesque, 1817
- Genus Pseudotoma Gray, 1825 accepted as Geomys Rafinesque, 1817
- Genus Reynoldsomys Albright, 1999 †
- Genus Saccophilus Gray, 1842 accepted as Geomys Rafinesque, 1817
- Genus Saccophorus Kuhl, 1820 accepted as Geomys Rafinesque, 1817
- Genus Schizodontomys Rensberger, 1973 †
- Genus Stratimus Korth, Bailey & Hunt, 1990 †
- Genus Syphyriomys Korth, 1995 † accepted as Heliscomys Cope, 1873 †
- Genus Tenudomys Rensberger, 1973 †
- Genus Thomomys Wied, 1839
- Genus Tomomys Brandt, 1855 accepted as Thomomys Wied, 1839
- Genus Trogomys Reeder, 1960 †
- Genus Yaviichnus Guerrero-Arenas, Jiménez-Hidalgo & Genise, 2020 †
- Genus Ziamys Gawne, 1975 †
- Genus Zygogeomys Merriam, 1895
- Genus Zygogeonys accepted as Zygogeomys Merriam, 1895
- Family Gliridae Muirhead, 1819
- Family Gobiomyidae Wang, 2001 †
- Family Heliscomyidae Korth, Wahlert & Emry, 1991 †
- Family Heptaxodontidae Anthony, 1917 †
- Family Heteromyidae Gray, 1868
- Family Hydrochaeridae Cabrera, 1961 accepted as Caviidae Waterhouse, 1839
- Family Hydrochoeridae Gill, 1872 accepted as Caviidae Waterhouse, 1839
- Family Hystricidae Fischer de Waldheim, 1817
- Family Ischyromyidae Alston, 1876 †
- Family Ivanantoniidae †
- Family Kenyamyidae Lavocat, 1973 †
- Family Laonastidae Jenkins et al., 2005 accepted as Diatomyidae Mein & Ginsburg, 1997
- Family Laredomyidae Wilson & Westgate, 1991 †
- Family Microtidae Cope, 1891 accepted as Cricetidae Fischer von Waldheim, 1817
- Family Muridae Illiger, 1811
- Family Muscardinidae accepted as Gliridae Muirhead, 1819
- Family Mylagaulidae Cope, 1881 †
- Family Myocastoridae Ameghino, 1902
- Family Myodonta incertae sedis
- Family Myophiomyidae Lavocat, 1973 †
- Family Myoxidae Gray, 1821 accepted as Gliridae Muirhead, 1819
- Family Neoepiblemidae †
- Family Nesomyidae Forsyth Major, 1897
- Family Octodontidae Waterhouse, 1839
- Family Octodontoidea incertae sedis
- Family Paramyidae Miller & Gidley, 1918 †
- Family Parapedetidae †
- Family Pedetidae Gray, 1825
- Family Petauristidae Miller, 1912 accepted as Sciuridae Gray, 1821
- Family Petromuridae Tullberg, 1899
- Family Petromyidae Tullberg, 1899 accepted as Petromuridae Tullberg, 1899
- Family Phiomyidae Wood, 1955 †
- Family Pipestoneomyidae Korth & Emry, 2013 †
- Family Platacanthomyidae Alston, 1876
- Family Protoptychidae Schlosser, 1911 †
- Family Pseudosciuridae Zittel, 1893 †
- Family Reithroparamyidae Wood, 1962 †
- Family Rhizomyidae Miller & Gidley, 1918 accepted as Spalacidae Gray, 1821
- Family Rhizospalacidae †
- Family Rodentia (awaiting allocation)
- Family Sciuravidae Miller & Gidley, 1918 †
- Family Sciuridae Gray, 1821
- Family Seleviniidae Bashanov & Belosludov, 1939 accepted as Gliridae Muirhead, 1819
- Family Simimyidae Wood, 1980 †
- Family Spalacidae Gray, 1821
- Family Tamquammyidae †
- Family Theridomyidae Alston, 1876 †
- Family Theridomyoidea incertae sedis †
- Family Thryonomyidae Pocock, 1922
- Family Thryonomyoidea (awaiting allocation)
- Family Thryonomyoidea incertae sedis
- Family Tsaganomyidae Matthew & Granger, 1923 †
- Family Tufamyidae Pickford, 2018 †
- Family Yuomyidae †
- Family Zapodidae Coues, 1875 accepted as Dipodidae Waterhouse, 1842
- Family Zegdoumyidae †
- Family Zelomyidae Dawson, Huang, Li & Wang, 2003 †
- Family Zetamyidae Ferrusquia-Villafranca et al., 2018 †
- Genus Anadianomys Tong, 1997 †
- Genus Borisomys Shevyreva, 1996 †
- Genus Borissomys Shevyreva, 1995 † accepted as Borisomys Shevyreva, 1996 †
- Genus Bugtimys Marivaux, Vianey-Liaud, Welcomme & Jaeger, 2002 †
- Genus Butomys Dashzeveg & Meng, 1998 †
- Genus Chambiramys Boivin, Marivaux, Candela, Orliac, Pujos, Salas-Gismondi, Tejada-Lara & Antoine, 2017 †
- Genus Chenomys Li & Meng, 2015 †
- Genus Chuankueimys Tong, 1997 †
- Genus Ekaterinomys Shevyreva, 1995 † accepted as Ekatherinomys Shevyreva, 1996 †
- Genus Ekatherinomys Shevyreva, 1996 †
- Genus Epeiromys Korth, 1989 †
- Genus Griphomys Wilson, 1940 †
- Genus Hannanomys Guo, Wang & Yang, 2000 †
- Genus Hohomys Hu, 1995 †
- Genus Hydentomys Tong, 1997 †
- Genus Juniperimus Shevyreva, 1996 †
- Genus Juniperusomys Shevyreva, 1995 † accepted as Juniperimus Shevyreva, 1996 †
- Genus Khodzhentia Averianov, 1996 †
- Genus Luribayomys Lavocat, 1976 †
- Genus Marfilomys Ferrusquía-Villafranca, 1989 †
- Genus Meliakrouniomys Harris & Wood, 1969 †
- Genus Monamys Sallam & Seiffert, 2019 †
- Genus Morenella Palmer, 1903 †
- Genus Morenia Ameghino, 1886 † accepted as Morenella Palmer, 1903 †
- Genus Muscides Berthold in Latreille, 1827
- Genus Museides Berthold in Latreille, 1827
- Genus Namaphiomys Pickford, 2020 †
- Genus Oromys Marivaux, 2017 †
- Genus Paracryptomys Lavocat, 1973 †
- Genus Pipestoneomys Donohoe, 1956 †
- Genus Plataeomys Ameghino, 1889 † accepted as Plataeomys Ameghino, 1881 †
- Genus Plataeomys Ameghino, 1881 †
- Genus Plataëomys Ameghino, 1889 † accepted as Plataeomys Ameghino, 1889 †
- Genus Plateomys Ameghino, 1881 † accepted as Plataeomys Ameghino, 1881 †
- Genus Pozomys Boivin, Marivaux, Orliac, Pujos, Salas-Gismondi, Tejada-Lara & Antoine, 2017 †
- Genus Pseudoplataeomys Kraglievich, 1934 † accepted as Plataeomys Ameghino, 1881 †
- Genus Rupestromys Pickford, 2020 †
- Genus Simplicimys Li & Meng, 2015 †
- Genus Stelmomys Tong, 1997 †
- Genus Tacheria Krapovickas & Nasif, 2011 †
- Genus Xueshimys Tong, 1997 †
- Genus Yongshengomys Li & Meng, 2015 †
- Genus Zamoramys Peláez-Campomanes & López-Martínez, 1996 †
- Genus Zodiomys Tong, 1997 †
- Genus Zoyphiomys Tong, 1997 †
- 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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