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 (basis of record)
Adenocystis J.D. Hooker & W.H. Harvey in J.D. Hooker, 1845 (extant flag source)
Agarum Bory de Saint-Vincent, 1826 accepted as Agarum Dumortier, 1822 (basis of record)
Agarum Bory de Saint-Vincent, 1826 accepted as Agarum Dumortier, 1822 (extant flag source)
Akkesiphycus Y. Yamada & T. Tanaka, 1944 (extant flag source)
Akkesiphycus Y. Yamada & T. Tanaka, 1944 (basis of record)
Alaria Greville, 1830 (extant flag source)
Alaria Greville, 1830 (basis of record)
Alethocladus Sauvageau, 1903 accepted as Halopteris Kützing, 1843 (extant flag source)
Alethocladus Sauvageau, 1903 accepted as Halopteris Kützing, 1843 (basis of record)
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 (basis of record)
Ascophyllum Stackhouse, 1809 (extant flag source)
Ascoseira Skottsberg, 1907 (extant flag source)
Ascoseira Skottsberg, 1907 (basis of record)
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 (extant flag source)
Basispora D.M. John & G.W. Lawson, 1974 (basis of record)
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 (basis of record)
Bodanella Zimmermann, 1927 (extant flag source)
Carpoglossum Kützing, 1843 (basis of record)
Carpoglossum Kützing, 1843 (extant flag source)
Carpomitra Kützing, 1843 (basis of record)
Carpomitra Kützing, 1843 (extant flag source)
Carpophyllum Greville, 1830 (extant flag source)
Carpophyllum Greville, 1830 (basis of record)
Caulocystis J.E. Areschoug, 1854 (basis of record)
Caulocystis J.E. Areschoug, 1854 (extant flag source)
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 (extant flag source)
Cladochroa Skottsberg, 1921 (basis of record)
Cladostephus C.A. Agardh, 1817 (extant flag source)
Cladostephus C.A. Agardh, 1817 (basis of record)
Cladothele J.D. Hooker & W.H. Harvey, 1845 (extant flag source)
Cladothele J.D. Hooker & W.H. Harvey, 1845 (basis of record)
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 (extant flag source)
Colpomenia (Endlicher) Derbès & Solier, 1851 (basis of record)
Corycus Kjellman, 1889 (extant flag source)
Corycus Kjellman, 1889 (basis of record)
Costaria Greville, 1830 (basis of record)
Costaria Greville, 1830 (extant flag source)
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 (basis of record)
Cymathaere J.G. Agardh, 1868 (extant flag source)
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 (extant flag source)
Desmarestia J.V.F. Lamouroux, 1813 (basis of record)
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 (extant flag source)
Dictyosiphon Greville, 1830 (basis of record)
Dipleura [misspelling] accepted as Diplura Hollenberg, 1969 (basis of record)
Dipleura [misspelling] accepted as Diplura Hollenberg, 1969 (extant flag source)
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 (extant flag source)
Disphacella Sauvageau, 1903 accepted as Sphacelaria H.C. Lyngbye in J.W. Hornemann, 1818 (basis of record)