Asparagopsis Montagne, 1840 (extant flag source)
Asterocytis (Hansgirg) Gobi ex F. Schmitz, 1896 accepted as Chroodactylon Hansgirg, 1885 (extant flag source)
Audouinella Bory de Saint-Vincent, 1823 (extant flag source)
Blinksia Hollenberg & I.A. Abbott, 1968 (extant flag source)
Boldia W.R. Herndon, 1964 (extant flag source)
Callocolax F. Schmitz ex Batters, 1895 (extant flag source)
Calosiphonia H.M. Crouan & P.L. Crouan, 1852 (extant flag source)
Catenellocolax Weber-van Bosse, 1928 (extant flag source)
Chondriella Levring in Skottsberg, 1941 (extant flag source)
Choreocolax Reinsch, 1875 (extant flag source)
Coeloseira Hollenberg, 1941 accepted as Gastroclonium Kützing, 1843 (extant flag source)
Compsopogon Montagne in Durieu de Maisonneuve, 1846 (extant flag source)
Conchocelis E.A. Batters in G. Murray, 1892 accepted as Porphyra C.A. Agardh, 1824 (extant flag source)
Constantinea Postels & Ruprecht, 1840 (extant flag source)
Corynomorpha J.G. Agardh, 1872 (extant flag source)
Crossocarpus Ruprecht in Middendorff, 1850 (extant flag source)
Cryptosiphonia J.G. Agardh, 1876 (extant flag source)
Cubiculosporum Kraft, 1973 (extant flag source)
Desmia Lyngbye, 1819 accepted as Desmarestia J.V.F. Lamouroux, 1813 (extant flag source)
Dilsea Stackhouse, 1809 (extant flag source)
Dudresnaya P.L. Crouan & H.M. Crouan, 1835 (extant flag source)
Dumontia J.V.F. Lamouroux, 1813 (extant flag source)
Endocladia J.G. Agardh, 1841 (extant flag source)
Farlowia J.G. Agardh, 1876 (extant flag source)
Gardneriella Kylin, 1941 (extant flag source)
Gelidiella Feldmann & G. Hamel, 1934 (extant flag source)
Gloiopeltis J.G. Agardh, 1842 (extant flag source)
Gloiosiphonia Carmichael in Berkeley, 1833 (extant flag source)
Goniotrichum Kützing, 1943 accepted as Stylonema Reinsch, 1875 (extant flag source)
Gracilaria Greville, 1830 (extant flag source)
Halarachnion Kützing, 1843 (extant flag source)
Halosaccion Kützing, 1843 (extant flag source)
Harveyella F. Schmitz & Reinke, 1889 (extant flag source)
Hummbrella S.A. Earle, 1969 (extant flag source)
Iridaea Bory de Saint-Vincent, 1826 (extant flag source)
Kallymeniopsis Perestenko, 1977 (extant flag source)
Kneuckeria Schmidle, 1905 (extant flag source)
Kyliniella Skuja, 1926 (extant flag source)
Lemanea Bory de Saint-Vincent, 1808 (extant flag source)
Neevea Batters, 1900 (extant flag source)
Nemalionopsis Skuja, 1934 (extant flag source)
Neoagardhiella M.J. Wynne & W.R. Taylor, 1973 accepted as Agardhiella F. Schmitz, 1897 (extant flag source)
Ochtodes J.G. Agardh, 1872 (extant flag source)
Palmaria Stackhouse, 1802 (extant flag source)
Peltasta J.G. Agardh, 1892 (extant flag source)
Phragmonema Zopf, 1882 (extant flag source)
Phyllophora Greville, 1830 (extant flag source)
Pikea Harvey, 1853 (extant flag source)
Platoma Schousboe ex F. Schmitz, 1894 (extant flag source)
Polyides C.A. Agardh, 1822 (extant flag source)
Porphyra C.A. Agardh, 1824 (extant flag source)
Porphyridium Nägeli, 1849 (extant flag source)
Pseudoanemonia V.J. Chapman, 1969 accepted as Hummbrella S.A. Earle, 1969 (extant flag source)
Pterocladia J.G. Agardh, 1851 (extant flag source)
Pterocladiophila K.-C. Fan & Papenfuss, 1959 (extant flag source)
Rhizophyllis Kützing, 1845 accepted as Contarinia Zanardini, 1843 (extant flag source)
Rhodochaete Thuret ex Bornet, 1892 (extant flag source)
Rhodochorton Nägeli, 1862 '1861' (extant flag source)
Rhododactylis J.G. Agardh, 1876 accepted as Husseya J.G. Agardh, 1901 (extant flag source)
Rissoella J.G. Agardh, 1849 (extant flag source)
Sphaerococcus Stackhouse, 1797 (extant flag source)
Stenocladia J.G. Agardh, 1872 accepted as Nizymenia Sonder, 1855 (extant flag source)
Thorea Bory de Saint-Vincent, 1808 (extant flag source)
Thuretella F. Schmitz, 1889 (extant flag source)
Tichocarpus Ruprecht, 1850 (extant flag source)
Turnerella F. Schmitz, 1897 (extant flag source)
Weeksia Setchell, 1901 (extant flag source)
Wurdemannia Harvey, 1853 (extant flag source)