IRMNG Taxon list
"Merodermid clade" accepted as Meridermatales
Abaciidae † accepted as Arbaciidae Gray, 1855
Abacionidae Shelley, 1979
Abadehellidae Loeblich & Tappan, 1984 †
Abadiellidae Hupé, 1953 †
Abagnostidae Yang & Liu, 1991 † accepted as Peronopsidae Westergard, 1936 †
Abathomphalidae Pessagno, 1967 †
Abderitidae Ameghino, 1889 †
Abelisauria incertae sedis †
Abelisauridae Bonaparte & Novas, 1985 †
Abelisauroidea incertae sedis †
Abelsporidae Azevedo, 1987
Aberrantidae Wolf, 1987
Aberrapecidae Jensen, Caira, Cielocha, Littlewood & Waeschenbach, 2016
Abertellidae Durham, 1955 †
Ablechroiulidae Andrássy, 1976
Abolliferidae Cavalier-Smith in Cavalier-Smith, Chao & Lewis, 2018
Abrocomidae Miller & Gidley, 1918
Abrocomophagidae Emerson & Price, 1976
Abrograptidae Mu, 1958 †
Abrophyllaceae Nakai, 1943 accepted as Rousseaceae de Candolle, 1839
Abrothallaceae S. Pérez-Ortega & A. Suija in Pérez-Ortega, Suija, Crespo & de los Ríos, 2014 accepted as Lichenoconiaceae P. Diederich & J.D. Lawrey in Hyde et al., 2013
Abrothallales
Abrsiidae Karanovic, 2008
Abylidae L. Agassiz, 1862
Abyssoanthidae Reimer & Fujiwara in Reimer, Sinniger, Fujiwara, Hirano & Maruyama, 2007
Abyssochitonidae dell'Angelo & Palazzi, 1989
Abyssochrysidae Tomlin, 1927
Abyssochrysoidea incertae sedis
Abyssocottidae
Acadelytridae Durden, 1972 †
Acadiocarididae Schram, 1974 †
Acalyptonotidae Walter, 1911
Acanaloniidae
Acanthaceae de Jussieu, 1789
Acanthametropodidae
Acanthamoebidae Sawyer & Griffin, 1975
Acantharea
Acantharea (awaiting allocation) (temporary name )
Acantharea (awaiting allocation) (temporary name )
Acantharia accepted as Acantharea
Acanthaspidiidae Menzies, 1962
Acanthasteridae Sladen, 1889
Acanthastrellidae Schrammen, 1924 †
Acanthephyridae Bate, 1888
Acanthinaceae †
Acanthinocyathida †
Acanthinocyathidae Bedford & Bedford, 1936 †
Acanthinulidae Steenberg, 1917 accepted as Valloniidae
Acanthisittidae Sundevall, 1872
Acanthizidae Bonaparte, 1854
Acanthoaxiidae van Ofwegen & McFadden, 2010
Acanthobatididae Steyskal, 1980 accepted as Anacanthobatidae von Bonde & Swart, 1923
Acanthobdellida
Acanthobdellidae Livanow, 1905
Acanthocephala
Acanthocephala (awaiting allocation) (temporary name )
Acanthocephala (awaiting allocation) (temporary name )
Acanthocephala (awaiting allocation) (temporary name )
Acanthoceramoporellidae †
Acanthocerataceae Round, Crawford & Mann, 1990 accepted as Chaetocerotaceae Ralfs, 1861
Acanthoceratidae Hyatt, 1900 †
Acanthochaetetidae Fischer, 1970
Acanthocheilidae Wülker, 1929 accepted as Anisakidae Railliet & Henry, 1912
Acanthochiasmidae Haeckel, 1862
Acanthochitidae Pilsbry, 1893 accepted as Acanthochitonidae Pilsbry, 1893
Acanthochitonida
Acanthochitonidae Pilsbry, 1893
Acanthocistidae accepted as Acanthocystidae Claus, 1874
Acanthocladiidae Zittel, 1880 †
Acanthoclinidae Gunther, 1861 accepted as Plesiopidae Gunther, 1861
Acanthoclymeniidae Schindewolf, 1955 †
Acanthocnemidae Crowson, 1964
Acanthocollaritrematidae
Acanthocollidae Schewiakoff, 1926
Acanthocolpidae Lühe, 1906
Acanthocotylidae Price, 1936
Acanthoctenidae Simon, 1892 accepted as Ctenidae Keyserling, 1877
Acanthocystida
Acanthocystidae Claus, 1874
Acanthodesmiidae Hertwig, 1879 accepted as Trissocyclidae Haeckel, 1881
Acanthodidae Huxley, 1861 †
Acanthodiformes †
Acanthodiformes (awaiting allocation) † (temporary name )
Acanthodii †
Acanthodii (awaiting allocation) † (temporary name )
Acanthodii (awaiting allocation) † (temporary name )
Acanthodontidae Lindström, 1970 †
Acanthodrilidae Claus, 1990
Acanthoecaceae accepted as Acanthoecidae Norris, 1965
Acanthoecida
Acanthoecidae Norris, 1965
Acanthogammaridae Garjajewia, 1901
Acanthogorgiidae Gray, 1859
Acanthograptidae †
Acanthogyridae Thapar, 1927 accepted as Quadrigyridae Van Cleave, 1920
Acanthomeniidae Salvini-Plawen, 1978
Acanthometridae Haeckel, 1887
Acanthomorpha
Acanthomorpha (awaiting allocation) (temporary name )