Abasia Wilson, 1908 (habitat flag source)
Abasia Wilson, 1908 (extant flag source)
Abergasilus Hewitt, 1978 (habitat flag source)
Abergasilus Hewitt, 1978 (extant flag source)
Abscondicola Fiers, 1990 (extant flag source)
Abscondicola Fiers, 1990 (habitat flag source)
Abyssopontius Stock, 1985 (extant flag source)
Abyssopontius Stock, 1985 (habitat flag source)
Acaenomolgus Humes & Stock, 1972 (extant flag source)
Acaenomolgus Humes & Stock, 1972 (habitat flag source)
Acanthocanthopsis Heegaard, 1945 (habitat flag source)
Acanthocanthopsis Heegaard, 1945 (extant flag source)
Acanthochondria Oakley, 1930 (extant flag source)
Acanthochondria Oakley, 1930 (habitat flag source)
Acanthochondrites Oakley, 1930 (habitat flag source)
Acanthochondrites Oakley, 1930 (extant flag source)
Acanthocolax Vervoort, 1969 (habitat flag source)
Acanthocolax Vervoort, 1969 (extant flag source)
Acanthocyclops Kiefer, 1927 (extant flag source)
Acanthocyclops Kiefer, 1927 (habitat flag source)
Acanthodiaptomus Kiefer, 1932 (extant flag source)
Acanthodiaptomus Kiefer, 1932 (habitat flag source)
Acantholochus Cressey, 1984 (habitat flag source)
Acantholochus Cressey, 1984 (extant flag source)
Acanthomolgus Humes & Stock, 1972 (extant flag source)
Acanthomolgus Humes & Stock, 1972 (habitat flag source)
Acartia Dana, 1846 (extant flag source)
Acartiella Sewell, 1914 (extant flag source)
Acartiella Sewell, 1914 (habitat flag source)
Acespadia Leigh-Sharpe, 1933 (extant flag source)
Acespadia Leigh-Sharpe, 1933 (habitat flag source)
Achelidelphys Lafargue & Laubier, 1977 (extant flag source)
Achelidelphys Lafargue & Laubier, 1977 (habitat flag source)
Achtheres Nordmann, 1832 (habitat flag source)
Achtheres Nordmann, 1832 (extant flag source)
Acontiophorus Brady, 1880 (extant flag source)
Acontiophorus Brady, 1880 (habitat flag source)
Acrenhydrosoma Lang, 1944 (habitat flag source)
Acrenhydrosoma Lang, 1944 (extant flag source)
Acrenhydrosoma Lang, 1948 accepted as Acrenhydrosoma Lang, 1944 (habitat flag source)
Acrenhydrosoma Lang, 1948 accepted as Acrenhydrosoma Lang, 1944 (extant flag source)
Acrocalanus Giesbrecht, 1888 (habitat flag source)
Acrocalanus Giesbrecht, 1888 (extant flag source)
Actinocletodes Fiers, 1986 (habitat flag source)
Actinocletodes Fiers, 1986 (extant flag source)
Actopsyllus Wells, 1967 (extant flag source)
Actopsyllus Wells, 1967 (habitat flag source)
Aculeopsis Huys & Willems, 1989 (extant flag source)
Aculeopsis Huys & Willems, 1989 (habitat flag source)
Acusicola Cressey, 1970 (habitat flag source)
Acusicola Cressey, 1970 (extant flag source)
Adenaplostoma Stock, 1993 (extant flag source)
Adenaplostoma Stock, 1993 (habitat flag source)
Adenopleurella Huys, 1990 (extant flag source)
Adenopleurella Huys, 1990 (habitat flag source)
Advena Kabata, 1979 accepted as Kabatazus Özdikmen, 2008 (extant flag source)
Advena Kabata, 1979 accepted as Kabatazus Özdikmen, 2008 (habitat flag source)
Aegisthus Giesbrecht, 1891 (extant flag source)
Aegisthus Giesbrecht, 1891 (habitat flag source)
Aethon Krøyer, 1837 (habitat flag source)
Aethon Krøyer, 1837 (extant flag source)
Aetideopsis G.O. Sars, 1903 (extant flag source)
Aetideopsis G.O. Sars, 1903 (habitat flag source)
Aetideus Brady, 1883 (habitat flag source)
Aetideus Brady, 1883 (extant flag source)
Afrocamptus Chappuis, 1932 (habitat flag source)
Afrocamptus Chappuis, 1932 (extant flag source)
Afrocyclopina Wells, 1967 (extant flag source)
Afrocyclopina Wells, 1967 (habitat flag source)
Afrocyclops G.O. Sars, 1927 (habitat flag source)
Afrocyclops G.O. Sars, 1927 (extant flag source)
Afrolaophonte Chappuis, 1960 (habitat flag source)
Afrolaophonte Chappuis, 1960 (extant flag source)
Afroleptastacus Huys, 1992 (habitat flag source)
Afroleptastacus Huys, 1992 (extant flag source)
Afrolernaea Fryer, 1956 (habitat flag source)
Afrolernaea Fryer, 1956 (extant flag source)
Afrosenia Huys & Gee, 1996 (extant flag source)
Afrosenia Huys & Gee, 1996 (habitat flag source)
Agetus Krøyer, 1849 (extant flag source)
Agetus Krøyer, 1849 (habitat flag source)
Aglaodiaptomus Light, 1938 (habitat flag source)
Aglaodiaptomus Light, 1938 (extant flag source)
Agnathaner Canu, 1892 accepted as Pachypygus G.O. Sars, 1921 (habitat flag source)
Agnathaner Canu, 1892 accepted as Pachypygus G.O. Sars, 1921 (extant flag source)
Aigondiceps Fiers, 1995 (habitat flag source)
Aigondiceps Fiers, 1995 (extant flag source)
Akessonia Bresciani & Lützen, 1962 (extant flag source)
Akessonia Bresciani & Lützen, 1962 (habitat flag source)
Albionella Kabata, 1979 accepted as Neoalbionella Özdikmen, 2008 (habitat flag source)
Albionella Kabata, 1979 accepted as Neoalbionella Özdikmen, 2008 (extant flag source)
Alcyonomolgus Humes, 1990 (extant flag source)
Alcyonomolgus Humes, 1990 (habitat flag source)
Alebion Krøyer, 1863 (habitat flag source)
Alebion Krøyer, 1863 (extant flag source)
Alella Leigh-Sharpe, 1925 (extant flag source)
Alella Leigh-Sharpe, 1925 (habitat flag source)
Algensiella Cottarelli & Baldari, 1987 (habitat flag source)
Algensiella Cottarelli & Baldari, 1987 (extant flag source)
Allantogynus Changeux, 1960 (extant flag source)