Acanthochloris Pascher, 1930 (extant flag source)
Acanthochloris Pascher, 1930 (basis of record)
Acercopsis Vietz, 1926 accepted as Tiphys Koch, 1837 (extant flag source)
Acercopsis Vietz, 1926 accepted as Tiphys Koch, 1837 (basis of record)
Acercus Koch, 1842 accepted as Tiphys Koch, 1837 (basis of record)
Acercus Koch, 1842 accepted as Tiphys Koch, 1837 (extant flag source)
Alectorolophus Zinn, 1757 accepted as Rhinanthus Linnaeus, 1753 (basis of record)
Aliniella B.V. Skvortzov, 1958 (basis of record)
Aliniella B.V. Skvortzov, 1958 (extant flag source)
Allelogromia De Saedeleer, 1934 accepted as Diplogromia Rhumbler, 1904 (extant flag source)
Allelogromia De Saedeleer, 1934 accepted as Diplogromia Rhumbler, 1904 (basis of record)
Alsine Linnaeus, 1753 accepted as Stellaria Linnaeus, 1753 (basis of record)
Amallocystis Fage, 1936 accepted as Thalassomyces Niezabitowski, 1913 (basis of record)
Amalorrhynchus Reitter, 1913 (extant flag source)
Amalorrhynchus Reitter, 1913 (basis of record)
Amastigamonas accepted as Amastigomonas De Saedeleer, 1931 (basis of record)
Amastigamonas accepted as Amastigomonas De Saedeleer, 1931 (extant flag source)
Amphychrysis accepted as Amphichrysis Korshikov, 1929 (basis of record)
Amphychrysis accepted as Amphichrysis Korshikov, 1929 (extant flag source)
Anisantha K.H.E. Koch, 1848 accepted as Bromus Linnaeus, 1753 (basis of record)
Anthrobathynella accepted as Antrobathynella (extant flag source)
Anthrobathynella accepted as Antrobathynella (basis of record)
Anuraea Ehrenberg, 1830 accepted as Keratella Bory de St. Vincent, 1822 (extant flag source)
Anuraea Ehrenberg, 1830 accepted as Keratella Bory de St. Vincent, 1822 (basis of record)
Arthroglena Bergendal, 1892 accepted as Dicranophorus Nitzsch in Ersch & Gruber, 1827 (extant flag source)
Arthroglena Bergendal, 1892 accepted as Dicranophorus Nitzsch in Ersch & Gruber, 1827 (basis of record)
Astasiopsis J.A.O. Bütschli in Bronn, 1884 (extant flag source)
Astasiopsis J.A.O. Bütschli in Bronn, 1884 (basis of record)
Astramoeba Vejdovsky, 1881 (basis of record)
Astramoeba Vejdovsky, 1881 (extant flag source)
Atractella Printz, 1921 (extant flag source)
Atractella Printz, 1921 (basis of record)
Atractonema S.F.N. von Stein, 1878 (extant flag source)
Atractonema S.F.N. von Stein, 1878 (basis of record)
Atypopthalmus Brunetti, 1911 accepted as Atypophthalmus Brunetti, 1911 (extant flag source)
Atypopthalmus Brunetti, 1911 accepted as Atypophthalmus Brunetti, 1911 (basis of record)
Aulaochtebius accepted as Aulacochthebius Kuwert, 1887 (basis of record)
Aulaochtebius accepted as Aulacochthebius Kuwert, 1887 (extant flag source)
Aurantiella R. Chodat, 1925 (extant flag source)
Aurantiella R. Chodat, 1925 (basis of record)
Barkhausia Moench, 1794 accepted as Crepis Linnaeus, 1753 (basis of record)
Bazarella Vaillant, 1961 (extant flag source)
Bazarella Vaillant, 1961 (basis of record)
Berdeniella Vaillant, 1976 (extant flag source)
Bereodes Eaton, 1867 (basis of record)
Bereodes Eaton, 1867 (extant flag source)
Bikosoeca E.G. Pringsheim (basis of record)
Bikosoeca E.G. Pringsheim (extant flag source)
Bitectatodinium G.J. Wilson, 1973 (basis of record)
Brassicella J. Fourreau ex O.E. Schulz, 1916 accepted as Coincya Rouy, 1891 (basis of record)
Brigantedinium P.C. Reid, 1977 (extant flag source)
Brigantedinium P.C. Reid, 1977 (basis of record)
Bromopsis (Dumortier) Fourreau, 1869 accepted as Bromus Linnaeus, 1753 (basis of record)
Brumptina Carini, 1933 (basis of record)
Brumptina Carini, 1933 (extant flag source)
Bumilleropsis accepted as Bumilleriopsis Printz, 1914 (extant flag source)
Bumilleropsis accepted as Bumilleriopsis Printz, 1914 (basis of record)
Camptothrix W. West & G.S. West, 1897 (extant flag source)
Camptothrix W. West & G.S. West, 1897 (basis of record)
Caribeopsyllus Suárez-Moraless & Castellanos, 1998 (basis of record)
Cathypna Gosse in Hudson & Gosse, 1886 accepted as Lecane Nitzsch in Ersch & Gruber, 1827 (basis of record)
Cathypna Gosse in Hudson & Gosse, 1886 accepted as Lecane Nitzsch in Ersch & Gruber, 1827 (extant flag source)
Cecidochloris Skuja, 1948 (extant flag source)
Cecidochloris Skuja, 1948 (basis of record)
Ceratochloa A.P. de Candolle & Palisot de Beauvois in Palisot de Beauvois, 1812 accepted as Bromus Linnaeus, 1753 (basis of record)
Ceratodinium Conrad, 1926 (extant flag source)
Ceratodinium Conrad, 1926 (basis of record)
Chalubinskia Woloszynska, 1916 (extant flag source)
Chalubinskia Woloszynska, 1916 (basis of record)
Chamagrostis Borkhausen in Wibel, 1799 accepted as Mibora Adanson, 1763 (basis of record)
Changia B.V. Skvortzov, 1960 (extant flag source)
Changia B.V. Skvortzov, 1960 (basis of record)
Characiellopsis M.O.P. Iyengar, 1975 (basis of record)
Characiellopsis M.O.P. Iyengar, 1975 (extant flag source)
Chasmostoma J. Massart, 1920 (extant flag source)
Chasmostoma J. Massart, 1920 (basis of record)
Chasmostomum Massart, 1920 accepted as Chasmostoma J. Massart, 1920 (basis of record)
Chasmostomum Massart, 1920 accepted as Chasmostoma J. Massart, 1920 (extant flag source)
Chilodinium J. Massart, 1920 accepted as Gymnodinium Stein, 1878 (basis of record)
Chilodinium J. Massart, 1920 accepted as Gymnodinium Stein, 1878 (extant flag source)
Chlamydococcus A. Braun, 1850 accepted as Haematococcus J. von Flotow, 1844 (extant flag source)
Chlamydococcus A. Braun, 1850 accepted as Haematococcus J. von Flotow, 1844 (basis of record)
Chlamydomonadopsis B. Fott, 1972 (basis of record)
Chlamydomonadopsis B. Fott, 1972 (extant flag source)
Chlora Adanson, 1763 accepted as Blackstonia Hudson, 1762 (basis of record)
Chlorangiochloris Korshikov, 1932 (extant flag source)
Chlorangiochloris Korshikov, 1932 (basis of record)
Chlorodesmus accepted as Chlorodesmis Harvey & Bailey, 1841 (extant flag source)
Chlorodesmus accepted as Chlorodesmis Harvey & Bailey, 1841 (basis of record)
Chloropteridella P.C. Silva, 1970 (basis of record)
Chloropteridella P.C. Silva, 1970 (extant flag source)
Chlorospira Korshikov, 1939 accepted as Stichococcus Nägeli, 1849 (basis of record)
Chlorospira Korshikov, 1939 accepted as Stichococcus Nägeli, 1849 (extant flag source)
Chlorotetraedron F.J. MacEntee, H.C. Bold & P.A. Archibald, 1978 (extant flag source)
Chlorotetraedron F.J. MacEntee, H.C. Bold & P.A. Archibald, 1978 (basis of record)
Chlorotetraëdron MacEntee, Bold & Archibald, 1978 accepted as Chlorotetraedron F.J. MacEntee, H.C. Bold & P.A. Archibald, 1978 (basis of record)
Chlorotetraëdron MacEntee, Bold & Archibald, 1978 accepted as Chlorotetraedron F.J. MacEntee, H.C. Bold & P.A. Archibald, 1978 (extant flag source)
Chlorotylium Kützing, 1843 (basis of record)
Chlorotylium Kützing, 1843 (extant flag source)
Chondrosphaera Skuja, 1964 (extant flag source)