Aaroniella Mockford, 1952 (basis of record)
Aaroniella Mockford, 1952 (extant flag source)
Abachrysa Banks, 1938 (basis of record)
Abachrysa Banks, 1938 (extant flag source)
Abacionidae Shelley, 1979 (basis of record)
Abacionidae Shelley, 1979 (extant flag source)
Abacola Edwards, 1891 accepted as Metis Philippi, 1843 (basis of record)
Abasia Wilson, 1908 (basis of record)
Abatoleon Banks, 1924 (extant flag source)
Abatoleon Banks, 1924 (basis of record)
Aberia Hochstetter, 1844 accepted as Dovyalis E.H.F. Meyer ex Arnott, 1841 (basis of record)
Aberrantidae Wolf, 1987 (extant flag source)
Aberrantidae Wolf, 1987 (basis of record)
Abludomelita Karaman, 1981 (basis of record)
Abyssopontius Stock, 1985 (basis of record)
Acanthametropodidae (basis of record)
Acanthametropodidae (extant flag source)
Acanthaxius Sakai & de Saint Laurent, 1989 (basis of record)
Acanthia Fabricius, 1775 accepted as Cimex Linnaeus, 1758 (basis of record)
Acanthisittidae Sundevall, 1872 (basis of record)
Acanthocephala de Laporte, 1832 (extant flag source)
Acanthocephala de Laporte, 1832 (basis of record)
Acanthochondrites Oakley, 1930 (basis of record)
Acanthocistidae accepted as Acanthocystidae Claus, 1874 (basis of record)
Acanthocistidae accepted as Acanthocystidae Claus, 1874 (extant flag source)
Acanthocolax Vervoort, 1969 (basis of record)
Acanthogonum J. Torrey, 1857 accepted as Chorizanthe R. Brown ex Bentham, 1836 (basis of record)
Acanthogyrys (basis of record)
Acantholochus Cressey, 1984 (basis of record)
Acanthomolgus Humes & Stock, 1972 (basis of record)
Acanthomysis Czerniavsky, 1882 (basis of record)
Acanthomysis Czerniavsky, 1882 (extant flag source)
Acanthonotozomellidae Coleman & Barnard, 1991 accepted as Iphimediidae Boeck, 1871 (basis of record)
Acanthonotozomellidae Coleman & Barnard, 1991 accepted as Iphimediidae Boeck, 1871 (extant flag source)
Acanthonotus Ross in Ross, 1835 accepted as Acanthonotozoma Boeck, 1876 (basis of record)
Acanthonotus Ross in Ross, 1835 accepted as Acanthonotozoma Boeck, 1876 (extant flag source)
Acanthophyra A. Milne-Edwards, 1881 accepted as Acanthephyra A. Milne-Edwards, 1881 (basis of record)
Acanthosaccus Schulze, 1899 (extant flag source)
Acanthosaccus Schulze, 1899 (basis of record)
Acanthoscelis Dietz, 1897 accepted as Acanthoscelidius (basis of record)
Acanthostomum Looss, 1899 (basis of record)
Acanthotanais Kussakin, 1967 accepted as Paratanais Dana, 1853 (basis of record)
Acanthoxanthium (A.P. de Candolle) Fourreau, 1869 (status source)
Acanthoxanthium (A.P. de Candolle) Fourreau, 1869 (extant flag source)
Acanthoxanthium (A.P. de Candolle) Fourreau, 1869 (basis of record)
Acanthozone Boeck, 1871 accepted as Paramphithoe Bruzelius, 1859 (basis of record)
Acarnidae Dendy, 1922 (basis of record)
Acartiella Sewell, 1914 (basis of record)
Acerates S. Elliott, 1817 accepted as Asclepias Linnaeus, 1753 (basis of record)
Acetosa P. Miller, 1754 accepted as Rumex Linnaeus, 1753 (basis of record)
Acetosella (Meisner) Fourreau, 1869 accepted as Rumex Linnaeus, 1753 (basis of record)
Achelidelphys Lafargue & Laubier, 1977 (basis of record)
Achorutes Templeton, 1835 accepted as Neanura Macgillivray, 1893 (basis of record)
Achorutes Templeton, 1835 accepted as Neanura Macgillivray, 1893 (extant flag source)
Achramorphidae Borojevic, Boury-Esnault, Manuel & Vacelet, 2002 (basis of record)
Achramorphidae Borojevic, Boury-Esnault, Manuel & Vacelet, 2002 (extant flag source)
Achroschizocarpus accepted as Smelowskia C.A. Meyer ex Ledebour, 1830 (extant flag source)
Achroschizocarpus accepted as Smelowskia C.A. Meyer ex Ledebour, 1830 (basis of record)
Achyrophorus Adanson, 1763 accepted as Hypochaeris Linnaeus, 1753 (basis of record)
Acoma Steiner, 1920 accepted as Nemacoma Hope & Murphy, 1972 (basis of record)
Acrenhydrosoma Lang, 1944 (basis of record)
Acrobatidae Aplin, 1987 (basis of record)
Acrocentropus Betten, 1934 (basis of record)
Acrocnida Gislén, 1926 (extant flag source)
Acrocnida Gislén, 1926 (basis of record)
Acrodiclidium C.G.D. Nees & C.F.P. Martius in C.G.D. Nees, 1833 accepted as Licaria Aublet, 1775 (basis of record)
Acrolasia K.B. Presl, 1831 accepted as Mentzelia Linnaeus, 1753 (extant flag source)
Acrolasia K.B. Presl, 1831 accepted as Mentzelia Linnaeus, 1753 (basis of record)
Acromia accepted as Acrocomia C.F.P. Martius, 1824 (basis of record)
Acromia accepted as Acrocomia C.F.P. Martius, 1824 (extant flag source)
Acronopsyche Banks, 1930 (basis of record)
Acrophyton accepted as Acrophytum Hickson, 1900 (basis of record)
Acrophyton accepted as Acrophytum Hickson, 1900 (extant flag source)
Actaea De Haan in Siebold, 1833 (basis of record)
Actaeomorpha Miers, 1877 (basis of record)
Actinocletodes Fiers, 1986 (basis of record)
Actinocoris Reuter, 1878 (basis of record)
Actinomeris Nuttall, 1818 accepted as Verbesina Linnaeus, 1753 (basis of record)
Actumnus Dana, 1851 (basis of record)
Acysta Champion, 1898 (basis of record)
Addisoniidae Dall, 1882 (extant flag source)
Addisoniidae Dall, 1882 (basis of record)
Adelina Wollaston, 1858 accepted as Adelina Dejean, 1835 (basis of record)
Adelina Wollaston, 1858 accepted as Adelina Dejean, 1835 (extant flag source)
Adenaplostoma Stock, 1993 (basis of record)
Adenolinum H.G.L. Reichenbach, 1837 accepted as Linum Linnaeus, 1753 (basis of record)
Adenolinum H.G.L. Reichenbach, 1837 accepted as Linum Linnaeus, 1753 (extant flag source)
Adenoplea Radlkofer, 1883 accepted as Buddleja Linnaeus, 1753 (basis of record)
Adicea Rafinesque ex N.L. Britton & A. Brown, 1896 (extant flag source)
Adicea Rafinesque ex N.L. Britton & A. Brown, 1896 (basis of record)
Adicea Rafinesque ex N.L. Britton & A. Brown, 1896 (status source)
Adicophasma Engel & Grimaldi, 2004 † (basis of record)
Adventina Rafinesque, 1836 accepted as Galinsoga Ruiz & Pavon, 1794 (basis of record)
Aegaeon Agassiz, 1846 [in Agassiz, 1842-1846] (basis of record)
Aegithalidae (extant flag source)
Aegithalidae (basis of record)
Aeria O.F. Cook, 1901 accepted as Gaussia H. Wendland, 1865 (basis of record)
Aerope Jeffreys, 1876 (basis of record)
Aeschrion Vellozo, 1829 accepted as Picrasma Blume, 1825 (basis of record)
Aethon Krøyer, 1837 (basis of record)