Abrocomidae Miller & Gidley, 1918 (taxonomy source)
Abrocomidae Miller & Gidley, 1918 (current name source)
Acanthobdellidae Livanow, 1905 (taxonomy source)
Acanthobdellidae Livanow, 1905 (current name source)
Acrobatidae Aplin, 1987 (current name source)
Acrobatidae Aplin, 1987 (taxonomy source)
Actaletidae (current name source)
Actaletidae (taxonomy source)
Acytosteliaceae Raper ex Raper & Quinlan (additional source)
Ailuridae Gray, 1843 (current name source)
Ailuridae Gray, 1843 (taxonomy source)
Allisoniaceae (taxonomy source)
Allisoniaceae (current name source)
Ambuchananiaceae A.J. Shaw, 2010 (current name source)
Ambuchananiaceae A.J. Shaw, 2010 (taxonomy source)
Andreaeales (taxonomy source)
Andreaeales (extant flag source)
Andreaeales (current name source)
Andreaeobryaceae (current name source)
Andreaeobryaceae (taxonomy source)
Andreaeopsida (current name source)
Andreaeopsida (extant flag source)
Andreaeopsida (basis of record)
Anomaluridae Gervais, 1849 (taxonomy source)
Anomaluridae Gervais, 1849 (current name source)
Antilocapridae Owen, 1841 (taxonomy source)
Antilocapridae Owen, 1841 (current name source)
Aotidae Elliot, 1913 (current name source)
Aotidae Elliot, 1913 (taxonomy source)
Aphelidiidae Gromov, 2000 accepted as Aphelidiaceae L. Tedersoo, S. Sanchez-Ramirez, U. Kõljalg, M. Bahram, M. Döring, D. Schigel, T.W. May, M. Ryberg & K. Abarenkov, 2018 (basis of record)
Aphelidiidae Gromov, 2000 accepted as Aphelidiaceae L. Tedersoo, S. Sanchez-Ramirez, U. Kõljalg, M. Bahram, M. Döring, D. Schigel, T.W. May, M. Ryberg & K. Abarenkov, 2018 (extant flag source)
Aplodontiidae Brandt, 1855 (current name source)
Aplodontiidae Brandt, 1855 (taxonomy source)
Arrhopalitidae Stach, 1956 (taxonomy source)
Arrhopalitidae Stach, 1956 (current name source)
Astracanthidae Haeckel, 1887 (current name source)
Astracanthidae Haeckel, 1887 (taxonomy source)
Atelidae Gray, 1825 (taxonomy source)
Atelidae Gray, 1825 (current name source)
Atlanticellidae Cachon-Enjumet, 1961 (taxonomy source)
Atlanticellidae Cachon-Enjumet, 1961 (current name source)
Aulacanthidae Haeckel, 1887 (current name source)
Aulacanthidae Haeckel, 1887 (taxonomy source)
Aulosphaeridae Haeckel, 1887 (current name source)
Aulosphaeridae Haeckel, 1887 (taxonomy source)
Balaenidae Gray, 1821 (taxonomy source)
Balaenidae Gray, 1821 (current name source)
Balaenopteridae Gray, 1864 (current name source)
Balaenopteridae Gray, 1864 (taxonomy source)
Balbianiaceae R.G. Sheath & K.M. Müller, 1999 (taxonomy source)
Balbianiaceae R.G. Sheath & K.M. Müller, 1999 (current name source)
Balliaceae H.-G. Choi, G.T. Kraft & G.W. Saunders, 2000 (current name source)
Balliaceae H.-G. Choi, G.T. Kraft & G.W. Saunders, 2000 (taxonomy source)
Bathyergidae Waterhouse, 1841 (current name source)
Bathyergidae Waterhouse, 1841 (taxonomy source)
Batrachospermaceae C.A. Agardh, 1824 (current name source)
Batrachospermaceae C.A. Agardh, 1824 (taxonomy source)
Blasiaceae (taxonomy source)
Blasiaceae (current name source)
Boldiaceae W.R. Herndon, 1964 (current name source)
Boldiaceae W.R. Herndon, 1964 (taxonomy source)
Borokaceae Cavalier-Smith in Cavalier-Smith & Chao, 2006 accepted as Borokidae Cavalier-Smith, 2006 (source of synonymy)
Borokidae Cavalier-Smith, 2006 (extant flag source)
Borokidae Cavalier-Smith, 2006 (current name source)
Borokidae Cavalier-Smith, 2006 (basis of record)
Bourletiellidae Börner, 1913 (current name source)
Bourletiellidae Börner, 1913 (taxonomy source)
Bovidae Gray, 1821 (taxonomy source)
Bovidae Gray, 1821 (current name source)
Brachystomellidae (current name source)
Brachystomellidae (taxonomy source)
Bradypodidae Gray, 1825 (current name source)
Bradypodidae Gray, 1825 (taxonomy source)
Burramyidae Broom, 1898 (current name source)
Burramyidae Broom, 1898 (taxonomy source)
Caenolestidae Trouessart, 1898 (taxonomy source)
Caenolestidae Trouessart, 1898 (current name source)
Calomyscidae Vorontsov & Potapova, 1979 (taxonomy source)
Calomyscidae Vorontsov & Potapova, 1979 (current name source)
Calycularia Mitten, 1861 (verified source for family)
Calyculariaceae He-Nygrén, Juslén, Ahonen, Glenny & Piippo, 2006 (taxonomy source)
Calyculariaceae He-Nygrén, Juslén, Ahonen, Glenny & Piippo, 2006 (basis of record)
Calyculariaceae He-Nygrén, Juslén, Ahonen, Glenny & Piippo, 2006 (current name source)
Calyculariaceae He-Nygrén, Juslén, Ahonen, Glenny & Piippo, 2006 (extant flag source)
Camelidae Gray, 1821 (taxonomy source)
Camelidae Gray, 1821 (current name source)
Canidae Fischer, 1817 (current name source)
Canidae Fischer, 1817 (taxonomy source)
Cannosphaeridae Haeckel, 1887 (taxonomy source)
Cannosphaeridae Haeckel, 1887 (current name source)
Capilloventrida (basis of record)
Capilloventrida (current name source)
Capilloventrida (extant flag source)
Capilloventridae Harman & Loden, 1984 (taxonomy source)
Capromyidae Smith, 1842 (taxonomy source)
Capromyidae Smith, 1842 (current name source)
Castanellidae Haeckel, 1887 (taxonomy source)
Castanellidae Haeckel, 1887 (current name source)
Castoridae Gray, 1821 (taxonomy source)
Castoridae Gray, 1821 (current name source)

 Descriptive info

 for Dasyporella norvegica Høeg, 1932 †

Fossil: Upper Ordovician (Fossilid.info) [details]

 Taxonomic remark

 for Capilloventrida

This order appears in Ruggiero (2014) and WoRMS but may not have been formally published. Family Capilloventridae ... [details]

 Taxonomic remark

 for Cthulhu James & Keeling, 2012

Family placement is tentative, refer original description. [details]

 Taxonomic remark

 for Cthylla James & Keeling, 2012

Family placement is tentative, refer original description. [details]

 Taxonomic remark

 for Endemosarcidae Erdos & Olive, 1971

Listed as Endosarcaceae in Ruggiero, 2014, but treated under zoological nomenclature in IRMNG as per other ... [details]

 Taxonomic remark

 for Enteridiidae Farr, 1982

The correct name of this family is confused at the present time. Being an ambiregnal taxon, it has been named in ... [details]

 Taxonomic remark

 for Lamprodermidae

Maintained as a distinct family by Cavalier-Smith, 2013 and Ruggiero, 2014, although Lado & Eliasson, 2017, include ... [details]

 Taxonomic remark

 for Mephitidae Bonaparte, 1845

As subfamily Mephinae (in Mustelidae) in McKenna & Bell, 1997, family in Wilson & Reeder, 1995 and Ruggiero, 2014. [details]

 Taxonomic remark

 for Neobalaenidae Gray, 1873

Included in Balaenidae in McKenna & Bell, 1997, but as accepted family in Wilson & Reeder, 2005 and in Ruggiero, ... [details]

 Taxonomic remark

 for Physeteridae Gray, 1821

Use in IRMNG follows Ruggiero, 2014 and WoRMS (2009-current) in excluding Kogiidae, the latter included in ... [details]

 Taxonomic remark

 for Plasmodiophoridae Zopf, 1884

Listed as Plasmodiophoraceae in Ruggiero, 2014, but treated under zoological nomenclature in IRMNG as per other ... [details]

 Taxonomic remark

 for Pontoporiidae Gray, 1870

Included within Iniidae (as per type genus) in Wilson & Reeder, 2005, but as accepted family in McKenna & Bell, ... [details]

 Taxonomic remark

 for Prionodontidae Pocock, 1933

Listed as valid family in Ruggiero, 2014, as subfamily (Prionodontinae) of Viverridae in Wilson & Reeder, 2005, and ... [details]

 Taxonomic remark

 for Reticulariaceae Chevallier, 1826 ex Corda, 1842

The correct name of this family is confused at the present time. Being an ambiregnal taxon, it has been named in ... [details]

 Taxonomic remark

 for Tantulocarida

Originally proposed as a new class of Crustacea, presently treated as a subclass of Maxillopoda, refer Ruggiero, 2014; ... [details]

 Taxonomic remark

 for Tubiferidae Poche, 1913

Nomen novum for Tubulinidae Doflein, 1909, however preoccupied in zoology by Tubiferidae Cossmann, 1895 (fossil ... [details]