Between brackets is the number of accepted species
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2 Shows the number of accepted species within the taxon
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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
- Class Bryozoa (awaiting allocation)
- Class Bryozoa incertae sedis
- Class Gymnolaemata
- Order Cheilostomata accepted as Cheilostomatida
- Order Cheilostomatida
- Family Acoraniidae López-Fé, 2006
- Family Actisecidae Harmer, 1957
- Family Adeonellidae Gregory, 1893 accepted as Adeonidae Jullien, 1903
- Family Adeonidae Jullien, 1903
- Family Aeteidae Smitt, 1867
- Family Akatoporidae Vigneaux, 1949
- Family Alysidiidae Levinsen, 1909
- Family Andrioporidae Lang, 1916 †
- Family Antroporidae Vigneaux, 1949
- Family Arachnopusiidae Jullien, 1888
- Family Ascophora incertae sedis
- Family Ascosiidae Jullien, 1883
- Family Aspidostomatidae Jullien, 1888
- Family Batoporidae Neviani, 1901
- Family Beaniidae Canu & Bassler, 1927
- Family Belluloporidae Ostrovsky, 2013
- Family Bicellariellidae Levinsen, 1909 accepted as Bugulidae Gray, 1848
- Family Bicellariidae accepted as Bugulidae Gray, 1848
- Family Bicorniferidae Keij, 1977 †
- Family Bifaxariidae Busk, 1884
- Family Biporidae accepted as Conescharellinidae Levinsen, 1909
- Family Bitectiporidae MacGillivray, 1895
- Family Borioplebidae Gordon, 2021
- Family Brydonellidae Taylor, Casadío & Gordon, 2008 †
- Family Bryobaculidae †
- Family Bryocryptellidae Vigneaux, 1949
- Family Bryopastoridae d'Hondt & Gordon, 1999
- Family Buchneriidae
- Family Buffonellodidae Gordon & d'Hondt, 1997
- Family Bugulidae Gray, 1848
- Family Cabereidae Busk, 1852 accepted as Candidae d'Orbigny, 1851
- Family Calescharidae Cook & Bock, 2001
- Family Calloporidae Norman, 1903
- Family Calpensiidae Canu & Bassler, 1923 accepted as Microporidae Gray, 1848
- Family Calpidoporidae Lang, 1916 † accepted as Cribrilinidae Hincks, 1879
- Family Calwelliidae MacGillivray, 1887
- Family Candidae d'Orbigny, 1851
- Family Catenicellidae Busk, 1852
- Family Cellariidae Hincks, 1880
- Family Celleporaridae Harmer, 1957 accepted as Celleporariidae Harmer, 1957
- Family Celleporariidae Harmer, 1957 accepted as Lepraliellidae Vigneaux, 1949
- Family Celleporidae Busk, 1852
- Family Chaperiellidae
- Family Chaperiidae Jullien, 1888
- Family Cheilhorneropsidae Annoscia, Braga & Finotti, 1984 †
- Family Cheilohorneropsidae Annoscia, Braga & Finotti, 1984 † accepted as Cheilhorneropsidae Annoscia, Braga & Finotti, 1984 †
- Family Cheiloporinidae Bassler, 1936
- Family Cheilostomatida (awaiting allocation)
- Family Cheilostomatida incertae sedis
- Family Chiplonkarinidae Taylor & Gordon, 2007 †
- Family Chlidoniidae Busk, 1884
- Family Chlidoniopsidae Harmer, 1957
- Family Chorizoporidae Vigneaux, 1949
- Family Cleidochasmatidae Cheetham & Sandberg, 1964
- Family Colatooeciidae Winston, 2005
- Family Concatenellidae †
- Family Conescharellinidae Levinsen, 1909
- Family Corynostylidae †
- Family Coscinopleuridae Canu, 1913 †
- Family Cothurnicellidae
- Family Crepidacanthidae Levinsen, 1909
- Family Cribrilinidae Hincks, 1879
- Family Cribrilinoidea incertae sedis
- Family Cryptosulidae Vigneaux, 1949
- Family Ctenoporidae Lang, 1916 † accepted as Cribrilinidae Hincks, 1879
- Family Cupuladriidae Lagaaij, 1952
- Family Cuverillieridae Annoscia, 1965 † accepted as Cuvillieridae Annoscia, 1965 †
- Family Cuvillieridae Annoscia, 1965 †
- Family Cyclicoporidae Hincks, 1884
- Family Cymuloporidae Winston & Vieira, 2013
- Family Desmacystidae
- Family Dhondtiscidae Gordon, 1989
- Family Didymosellidae Brown, 1952
- Family Diedroporidae Gordon & Taylor, 2015 †
- Family Disheloporidae Lang, 1916 † accepted as Cribrilinidae Hincks, 1879
- Family Ditaxiporidae accepted as Catenicellidae Busk, 1852
- Family Ditaxiporinidae Cheetham, 1963 † accepted as Catenicellidae Busk, 1852
- Family Doryporellidae Grischenko, Taylor & Mawatari, 2004
- Family Duvergieriidae †
- Family Dysnoetoporidae Voigt, 1971 †
- Family Echinovadomidae Tilbrook, Hayward & Gordon, 2001
- Family Electridae Stach, 1937
- Family Elementellidae Gordon, 2021
- Family Ellisinidae Vigneaux, 1949
- Family Eminooeciidae Hayward & Thorpe, 1988
- Family Epistomiidae Gregory, 1903
- Family Escharellidae Levinsen, 1909
- Family Eucrateidae Hincks, 1880
- Family Euoplozoidae Harmer, 1926
- Family Eurystomellidae Levinsen, 1909
- Family Euthyrisellidae Bassler, 1953
- Family Euthyroididae Levinsen, 1909
- Family Exechonellidae Harmer, 1957
- Family Exochellidae Bassler, 1935
- Family Farciminariidae Busk, 1852
- Family Flustridae Fleming, 1828
- Family Foveolariidae Gordon & Winston, 2005
- Family Fusicellariidae Canu, 1990 †
- Family Gemelliporellidae Vigneaux, 1949 †
- Family Gigantoporidae Bassler, 1935
- Family Granomuridae Gordon, 2021
- Family Haplopomidae Gordon, 2011 (?)
- Family Heliodomidae Vigneaux, 1949
- Family Hiantoporidae Gregory, 1893
- Family Hincksinidae Canu & Bassler, 1925 accepted as Flustridae Fleming, 1828
- Family Hincksiporidae Powell, 1968
- Family Hippaliosinidae Winston, 2005
- Family Hippopodinidae Levinsen, 1909
- Family Hippoponellidae accepted as Hippoporidridae Vigneaux, 1949
- Family Hippoporidridae Vigneaux, 1949
- Family Hippoporinidae Bassler, 1935
- Family Hippothoidae Busk, 1859
- Family Inversiscaphidae Winston & Jackson, 2021
- Family Inversiulidae Vigneaux, 1949
- Family Jaculinidae Zabala, 1986
- Family Jubellidae Reverter-Gil & Fernández-Pulpeiro, 2001
- Family Kleidionellidae Vigneaux, 1949 † accepted as Lepraliellidae Vigneaux, 1949
- Family Labioporellidae accepted as Steginoporellidae Hincks, 1884
- Family Labiostomellidae Silén, 1942
- Family Lacernidae Jullien, 1888
- Family Lagynoporidae Lang, 1916 † accepted as Cribrilinidae Hincks, 1879
- Family Lanceoporidae Harmer, 1957
- Family Leiosalpingidae d'Hondt & Gordon, 1996
- Family Lekythoglenidae †
- Family Lekythoporidae Levinsen, 1909
- Family Lepraliellidae Vigneaux, 1949
- Family Lunulariidae Levinsen, 1909
- Family Lunulitidae Lagaaij, 1952 †
- Family Macroporidae Uttley, 1949
- Family Mamilloporidae Canu & Bassler, 1927
- Family Marcusadoreidae Winston, Vieira & Woollacott, 2014
- Family Margarettidae Harmer, 1957
- Family Mawatariidae Gordon, 1990
- Family Membranicellariidae Levinsen, 1909
- Family Membraniporidae Busk, 1854
- Family Metrabdotosidae accepted as Metrarabdotosidae Vigneaux, 1949
- Family Metrarabdotosidae Vigneaux, 1949
- Family Microporellidae Hincks, 1879
- Family Microporidae Gray, 1848
- Family Mixtopeltidae Gordon, 1994
- Family Monoporellidae Hincks, 1882
- Family Mourellinidae Reverter-Gil, Souto & Fernández-Pulpeiro, 2011
- Family Mucronellidae Levinson, 1902 accepted as Romancheinidae Jullien, 1888
- Family Myriaporidae Gray, 1849
- Family Myrioporidae
- Family Myriozoidae Smitt, 1868 accepted as Myriaporidae Gray, 1849
- Family Neoeuthyridae Cook, 2011 (?)
- Family Nephroporidae Marsson, 1887 †
- Family Onchoporidae
- Family Onychocellidae Jullien, 1881
- Family Orbituliporidae Canu & Bassler, 1923
- Family Orbituloporidae
- Family Otionellidae Bock & Cook, 1998
- Family Otoporidae Lang, 1916 † accepted as Cribrilinidae Hincks, 1879
- Family Pacificincolidae Liu & Liu, 1999
- Family Parmulariidae accepted as Lanceoporidae Harmer, 1957
- Family Pasytheidae Davis, 1934
- Family Peedeesellidae Taylor & McKinney, 2006 †
- Family Pelmatoporidae Lang, 1916
- Family Peristomellidae
- Family Petalostegidae Gordon, 1984
- Family Petraliellidae Harmer, 1957
- Family Petraliidae Levinsen, 1909
- Family Phidoloporidae Gabb & Horn, 1862
- Family Phoceanidae Vigneaux, 1949
- Family Phorioppniidae Gordon & d'Hondt, 1997
- Family Phylactellidae
- Family Platyglenidae Marsson, 1887 †
- Family Polliciporidae Moyano, 2000
- Family Poricellariidae Harmer, 1926
- Family Porinidae d'Orbigny, 1852
- Family Powellithecidae Di Martino, Taylor, Gordon & Liow, 2016
- Family Prostomariidae MacGillivray, 1895 †
- Family Pseudolepraliidae Silén, 1942
- Family Pyrisinellidae di Martino & Taylor, 2012
- Family Quadricellariidae Gordon, 1984
- Family Reteporidae Smitt, 1868 accepted as Phidoloporidae Gabb & Horn, 1862
- Family Rhabdozoidae MacGillivray, 1887
- Family Rhacheoporidae Lang, 1916 †
- Family Rhamphostomellidae
- Family Robertsonidridae Rosso, 2010
- Family Romancheinidae Jullien, 1888
- Family Sadkoidae
- Family Savignyellidae Levinsen, 1909
- Family Schismoporidae
- Family Schizoporellidae Jullien, 1883
- Family Sclerodomidae Levinsen, 1909
- Family Scorioporidae †
- Family Scrupariidae Busk, 1852
- Family Scrupocellariidae Levinsen, 1909 accepted as Candidae d'Orbigny, 1851
- Family Selenariidae Busk, 1854
- Family Sertellidae Jullien in Jullien & Calvet, 1903 accepted as Phidoloporidae Gabb & Horn, 1862
- Family Setosellidae Levinsen, 1909
- Family Setosellinidae Hayward & Cook, 1979 accepted as Heliodomidae Vigneaux, 1949
- Family Sfeniellidae Gordon, 2006 †
- Family Sinoflustridae Gordon, 2009
- Family Siphonicytaridae Hanner, 1957
- Family Skyloniidae Sandberg, 1963 †
- Family Smittinidae Levinsen, 1909
- Genus Alismittina Soule & Soule, 1964 accepted as Parasmittina Osburn, 1952
- Genus Amynaskolia Figuerola, Gordon & Cristobo, 2018
- Genus Aspericreta Hayward & Thorpe, 1990
- Genus Bostrychophora Hayward & Thorpe, 1988 accepted as Bostrychopora Hayward & Thorpe, 1988
- Genus Breoganipora Souto, Berning & Ostrovsky, 2016
- Genus Dakariella Moyano, 1966
- Genus Dengordonia Soule, Soule & Chaney, 1995
- Genus Dittomesia Gordon, 1989
- Genus Grayporella Annoscia, 1969 † accepted as Porella Gray, 1848
- Genus Hemismittoidea Soule & Soule, 1973
- Genus Houzeauina Pergens, 1889 †
- Genus Parasmittina Osburn, 1952
- Genus Pemmatoporella Hayward & Taylor, 1984
- Species Pemmatoporella marginata (Calvet, 1909)
- Genus Phylactella Hincks, 1879
- Genus Platychelyna Hayward & Thorpe, 1990
- Genus Pleurocodonellina Soule & Soule, 1973
- Genus Prenantia Gautier, 1962
- Genus Pseudoflustra Bidenkap, 1897
- Genus Raymondcia Soule, Soule & Chaney, 1995
- Genus Rimulostoma Vigneaux, 1949 †
- Genus Schismoporella Gregory, 1893 †
- Genus Smittia Hincks, 1879 accepted as Smittina Norman, 1903
- Genus Smittina Norman, 1903
- Genus Smittinella Canu & Bassler in Bassler, 1934
- Genus Smittoidea Osburn, 1952
- Genus Thrypticocirrus Hayward & Thorpe, 1988
- Genus Tracheloptyx Hayward, 1993
- Family Steginoporellidae Hincks, 1884
- Family Stomachetosellidae Canu & Bassler, 1917
- Family Taenioporinidae Gordon, 2011 (?) †
- Family Taractoporidae Lang, 1916 † accepted as Cribrilinidae Hincks, 1879
- Family Tendridae Vigneaux, 1949
- Family Tessaradomidae Jullien, 1903
- Family Tetraplariidae Harmer, 1957
- Family Teuchoporidae Neviani, 1895
- Family Thalamoporellidae Levinsen, 1902
- Family Thoracoporidae Lang, 1916 †
- Family Torquatellidae Tilbrook, 2006
- Family Tremoschizodinidae Vigneaux, 1949 accepted as Stomachetosellidae Canu & Bassler, 1917
- Family Trypostegidae Gordon, Tilbrook & Winston in Winston, 2005
- Family Tubucellariidae Busk, 1884 accepted as Margarettidae Harmer, 1957
- Family Umbonulidae Canu, 1904
- Family Urceoliporidae Bassler, 1936
- Family Vicidae Gordon, 1988
- Family Vinculariidae Busk, 1852 †
- Family Vitrimurellidae Winston, Vieira & Woollacott, 2014
- Family Vittaticellidae
- Family Watersiporidae Vigneaux, 1949
- Family Wawaliidae †
- Genus Spirocoleopora Winston & Jackson, 2021
- Order Ctenostomata accepted as Ctenostomatida
- Order Ctenostomatida
- Order Gymnolaemata (awaiting allocation)
- Order Lepraliomorpha
- Class Phylactolaemata
- Class Stenolaemata
- Phylum Cephalorhyncha incertae sedis
- Phylum Chaetognatha
- Phylum Chitinozoa †
- Phylum Chordata
- Phylum Cnidaria
- Phylum Ctenophora
- Phylum Cycliophora
- Phylum Cycloneuralia 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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