ARMS Taxon list
Abludomelita Karaman, 1981
Abludomelita valida (Shoemaker, 1955) accepted as Melitoides valida (Shoemaker, 1955)
Acanthephyridae Spence Bate, 1888
Acanthocyclops Kiefer, 1927
Acanthocyclops vernalis (Fischer, 1853) represented as Acanthocyclops vernalis vernalis (Fischer, 1853)
Acanthocyclops vernalis vernalis (Fischer, 1853)
Acanthocythereis Howe, 1963
Acanthocythereis agapensis Lev, 1983
Acanthocythereis dunelmensis (Norman, 1865) accepted as Actinocythereis dunelmensis (Norman, 1865)
Acanthomysis Czerniavsky, 1882
Acanthomysis dybowskii (Derzhavin, 1913) accepted as Disacanthomysis dybowskii (Derzhavin, 1913)
Acanthomysis stelleri (Derzhavin, 1913)
Acanthonotozoma Boeck, 1876
Acanthonotozoma cristatum (Ross, 1835)
Acanthonotozoma dunbari Just, 1978
Acanthonotozoma gurjanovae Just, 1978
Acanthonotozoma inflatum (Krøyer, 1842)
Acanthonotozoma magnum Just, 1978
Acanthonotozoma monodentatum Kudrjaschov, 1965
Acanthonotozoma rusanovae Bryazgin, 1974
Acanthonotozoma serratum (O. Fabricius, 1780)
Acanthonotozoma sinuatum Just, 1978
Acanthonotozomatidae Stebbing, 1906
Acanthostepheia Boeck, 1871
Acanthostepheia behringiensis (Lockington, 1877)
Acanthostepheia incarinata Gurjanova, 1929
Acanthostepheia malmgreni (Goës, 1866)
Acanthozone Boeck, 1871 accepted as Paramphithoe Bruzelius, 1859
Acanthozone polyacantha Murdoch, 1885 accepted as Paramphithoe polyacantha (Murdoch, 1885)
Acari
Acariformes
Acarina accepted as Acari
Acartia Dana, 1846
Acartia (Acanthacartia) Steuer, 1915
Acartia (Acanthacartia) bifilosa (Giesbrecht, 1881)
Acartia (Acanthacartia) tumida Willey, 1920
Acartia (Acartiura) Steuer, 1915
Acartia (Acartiura) clausi Giesbrecht, 1889
Acartia (Acartiura) hudsonica Pinhey, 1926
Acartia (Acartiura) longiremis (Lilljeborg, 1853)
Acartiidae Sars G.O., 1903
Aceroides G.O. Sars, 1892
Aceroides (Aceroides) G.O. Sars, 1892
Aceroides (Aceroides) latipes (G.O. Sars, 1883)
Aceroides (Aceroides) latipes latipes (G.O. Sars, 1883) represented as Aceroides (Aceroides) latipes (G.O. Sars, 1883)
Aceroides (Aceroides) latipes robusta Gurjanova, 1933
Aceroides (Aceroides) sedovi Gurjanova, 1946
Acetabulastoma Schornikov, 1970
Acetabulastoma arcticum Schornikov, 1970
Acetabulastoma hyperboreum (Scott, 1899)
Acetabulastoma rostratum (Sars, 1866)
Achelia Hodge, 1864
Achelia alaskensis (Cole, 1904)
Achelia borealis (Schimkewitsch, 1895)
Achelia echinata Hodge, 1864
Achelia laevis Hodge, 1864
Achelia lavrentii (Losina-Losinsky, L.K., 1933) accepted as Achelia spinosa (Stimpson, 1853)
Achelia litke (Losina-Losinsky, L.K., 1933) accepted as Achelia spinosa (Stimpson, 1853)
Achelia salebrosa Losina-Losinsky, 1961
Achelia spinosa (Stimpson, 1853)
Achelia uschakovi Losina-Losinsky L.K., 1933 accepted as Achelia spinosa (Stimpson, 1853)
Achelinae Wilson, 1881
Acidostoma Lilljeborg, 1865
Acidostoma laticorne G.O. Sars, 1879
Acidostoma laticornis G. O. Sars, 1879 accepted as Acidostoma laticorne G.O. Sars, 1879
Acidostoma molariferum Margulis, 1963
Acidostoma obesum (Spence Bate & Westwood, 1861)
Acidostoma pectinata Gurjanova, 1962
Acidostomatidae Stoddart & Lowry, 2012
Actinocythereis Puri, 1953
Actinocythereis dunelmensis (Norman, 1865)
Adenopleurellidae Huys, 1990
Aega Leach, 1816
Aega psora (Linnaeus, 1758)
Aega ventrosa M. Sars, 1859 accepted as Aegiochus ventrosa (M. Sars, 1859)
Aegidae White, 1850
Aeginella Boeck, 1861
Aeginella longicornis (Krøyer, 1843) accepted as Aeginina longicornis (Krøyer, 1843)
Aeginella spinosa Boeck, 1861
Aeginina Norman, 1905
Aeginina longicornis (Krøyer, 1843)
Aegiochus Bovallius, 1885
Aegiochus ventrosa (M. Sars, 1859)
Aegisthidae Giesbrecht, 1893
Aetideidae Giesbrecht, 1892-1893
Aetideopsis Sars G.O., 1903
Aetideopsis armata (Boeck, 1873)
Aetideopsis armatus (Boeck, 1873) accepted as Aetideopsis armata (Boeck, 1873)
Aetideopsis minor (Wolfenden, 1911)
Aetideopsis rostrata Sars G.O., 1903
Aetideus Brady, 1883
Aetideus armatus (Boeck, 1873)
Aetideus pacificus Brodsky, 1950 accepted as Pseudochirella pacifica (Brodsky, 1950)
Afrogitanopsis G. Karaman, 1980
Afrogitanopsis paguri (Myers, 1974)
Afromysini Wittmann, Ariani & Lagardère, 2014
Agaue Lohmann, 1889
Agaue alberti (Trouessart, 1902) accepted as Bradyagaue alberti (Trouessart, 1902)
Agaue alberti var. caraensis Sokolov, 1952 accepted as Bradyagaue caraensis (Sokolov, 1952)
Akanthophoreidae Sieg, 1986