Acrocarpia J.E. Areschoug, 1854 (basis of record)
Acrocarpia J.E. Areschoug, 1854 (extant flag source)
Acrothrix Kylin, 1907 (extant flag source)
Acrothrix Kylin, 1907 (basis of record)
Acystis Schiffner, 1934 (extant flag source)
Acystis Schiffner, 1934 (basis of record)
Adenocystis J.D. Hooker & W.H. Harvey in J.D. Hooker, 1845 (extant flag source)
Adenocystis J.D. Hooker & W.H. Harvey in J.D. Hooker, 1845 (basis of record)
Agarum Bory de Saint-Vincent, 1826 accepted as Agarum Dumortier, 1822 (extant flag source)
Agarum Bory de Saint-Vincent, 1826 accepted as Agarum Dumortier, 1822 (basis of record)
Akkesiphycus Y. Yamada & T. Tanaka, 1944 (basis of record)
Akkesiphycus Y. Yamada & T. Tanaka, 1944 (extant flag source)
Alaria Greville, 1830 (extant flag source)
Alaria Greville, 1830 (basis of record)
Alethocladus Sauvageau, 1903 accepted as Halopteris Kützing, 1843 (basis of record)
Alethocladus Sauvageau, 1903 accepted as Halopteris Kützing, 1843 (extant flag source)
Analipus Kjellman, 1889 (extant flag source)
Analipus Kjellman, 1889 (basis of record)
Anthophycus Kützing, 1849 (basis of record)
Anthophycus Kützing, 1849 (extant flag source)
Arthrocladia Duby, 1830 (extant flag source)
Arthrocladia Duby, 1830 (basis of record)
Arthrothamnus Ruprecht, 1848 (extant flag source)
Arthrothamnus Ruprecht, 1848 (basis of record)
Ascophyllum Stackhouse, 1809 (extant flag source)
Ascophyllum Stackhouse, 1809 (basis of record)
Ascoseira Skottsberg, 1907 (basis of record)
Ascoseira Skottsberg, 1907 (extant flag source)
Asteronema Delépine & Asensi, 1975 (extant flag source)
Asteronema Delépine & Asensi, 1975 (basis of record)
Axillariella P.C. Silva, 1959 (extant flag source)
Axillariella P.C. Silva, 1959 (basis of record)
Basispora D.M. John & G.W. Lawson, 1974 (basis of record)
Basispora D.M. John & G.W. Lawson, 1974 (extant flag source)
Battersia Reinke ex Batters, 1890 (extant flag source)
Battersia Reinke ex Batters, 1890 (basis of record)
Bellotia Harvey, 1855 (extant flag source)
Bellotia Harvey, 1855 (basis of record)
Bifurcariopsis Papenfuss, 1940 (basis of record)
Bifurcariopsis Papenfuss, 1940 (extant flag source)
Bodanella Zimmermann, 1927 (extant flag source)
Bodanella Zimmermann, 1927 (basis of record)
Carpoglossum Kützing, 1843 (extant flag source)
Carpoglossum Kützing, 1843 (basis of record)
Carpomitra Kützing, 1843 (basis of record)
Carpomitra Kützing, 1843 (extant flag source)
Carpophyllum Greville, 1830 (basis of record)
Carpophyllum Greville, 1830 (extant flag source)
Caulocystis J.E. Areschoug, 1854 (extant flag source)
Caulocystis J.E. Areschoug, 1854 (basis of record)
Chnoospora J.G. Agardh, 1847 (extant flag source)
Chnoospora J.G. Agardh, 1847 (basis of record)
Chorda Stackhouse, 1797 (basis of record)
Chorda Stackhouse, 1797 (extant flag source)
Chordariopsis Kylin, 1940 (basis of record)
Chordariopsis Kylin, 1940 (extant flag source)
Choristocarpus Zanardini, 1860 (basis of record)
Choristocarpus Zanardini, 1860 (extant flag source)
Cladochroa Skottsberg, 1921 (basis of record)
Cladochroa Skottsberg, 1921 (extant flag source)
Cladostephus C.A. Agardh, 1817 (extant flag source)
Cladostephus C.A. Agardh, 1817 (basis of record)
Cladothele J.D. Hooker & W.H. Harvey, 1845 (basis of record)
Cladothele J.D. Hooker & W.H. Harvey, 1845 (extant flag source)
Climacosorus Sauvageau, 1933 (basis of record)
Climacosorus Sauvageau, 1933 (extant flag source)
Coccophora Greville, 1830 (extant flag source)
Coccophora Greville, 1830 (basis of record)
Colpomenia (Endlicher) Derbès & Solier, 1851 (basis of record)
Colpomenia (Endlicher) Derbès & Solier, 1851 (extant flag source)
Corycus Kjellman, 1889 (extant flag source)
Corycus Kjellman, 1889 (basis of record)
Costaria Greville, 1830 (extant flag source)
Costaria Greville, 1830 (basis of record)
Costularia Y. Petrov & I. Gusarova in I. Gusarova & Y. Petrov, 1971 accepted as Costulariella N.G. Kloczcova & T.A. Kloczcova, 2010 (basis of record)
Costularia Y. Petrov & I. Gusarova in I. Gusarova & Y. Petrov, 1971 accepted as Costulariella N.G. Kloczcova & T.A. Kloczcova, 2010 (extant flag source)
Cutleria Greville, 1830 (basis of record)
Cutleria Greville, 1830 (extant flag source)
Cymathaere J.G. Agardh, 1868 (extant flag source)
Cymathaere J.G. Agardh, 1868 (basis of record)
Cystophora J.G. Agardh, 1841 (basis of record)
Cystophora J.G. Agardh, 1841 (extant flag source)
Cystoseira C.A. Agardh, 1820 (extant flag source)
Cystoseira C.A. Agardh, 1820 (basis of record)
Delamarea Hariot, 1889 (basis of record)
Delamarea Hariot, 1889 (extant flag source)
Desmarestia J.V.F. Lamouroux, 1813 (basis of record)
Desmarestia J.V.F. Lamouroux, 1813 (extant flag source)
Dictyoneuropsis G.M. Smith, 1942 accepted as Dictyoneurum Ruprecht, 1852 (basis of record)
Dictyoneuropsis G.M. Smith, 1942 accepted as Dictyoneurum Ruprecht, 1852 (extant flag source)
Dictyoneurum Ruprecht, 1852 (basis of record)
Dictyoneurum Ruprecht, 1852 (extant flag source)
Dictyosiphon Greville, 1830 (basis of record)
Dictyosiphon Greville, 1830 (extant flag source)
Dipleura [misspelling] accepted as Diplura Hollenberg, 1969 (extant flag source)
Dipleura [misspelling] accepted as Diplura Hollenberg, 1969 (basis of record)
Discosporangium Falkenberg, 1878 (basis of record)
Discosporangium Falkenberg, 1878 (extant flag source)
Disphacella Sauvageau, 1903 accepted as Sphacelaria H.C. Lyngbye in J.W. Hornemann, 1818 (basis of record)
Disphacella Sauvageau, 1903 accepted as Sphacelaria H.C. Lyngbye in J.W. Hornemann, 1818 (extant flag source)