Ardreanema R.E. Norris & I.A. Abbott, 1992 genus accepted

Ascocladium Nägeli, 1861 genus provisionally accepted

Balliella H. Itono & T. Tanaka, 1973 genus accepted

Boreothamnion M.J. Wynne, 1980 genus accepted

Bornetia Thuret, 1855 genus accepted

Boryna Grateloup ex Bory de Saint-Vincent, 1822 genus accepted

Calliclavula C.W. Schneider in R.B. Searles & C.W. Schneider, 1989 genus accepted

Callithamniella G. Feldman-Mazoyer, 1938 genus accepted

Campylaephora J.Agardh, 1851 genus accepted

Carpoblepharis Kützing, 1843 genus accepted

Centroceras F.T. Kützing, 1841 genus accepted

Centrocerocolax A.B. Joly, 1966 genus accepted

Ceramium Roth, 1797 genus accepted

Chaetoceras Kützing, 1847 genus accepted

Herpochondria F.Schmitz & Falkenberg, 1897 genus accepted

Herpothamnion Nägeli, 1862 genus provisionally accepted

Amasperma Rafinesque, 1814 genus provisionally accepted

Antithamnion Nägeli, 1847 genus accepted

Antithamnionella Lyle, 1922 genus accepted

Microcladia Greville, 1830 genus accepted

Miscosporium Nägeli, 1862 genus accepted

Muellerena F.Schmitz, 1897 genus accepted

Amoenothamnion Wollaston, 1968 genus accepted

Callidictyon J.N. Norris & I.A. Abbott in J.N. Norris, I.A. Abbott & C.R. Agegian, 1995 genus accepted

Delesseriopsis Okamura, 1931 genus accepted

Elisiella Womersley, 1998 genus accepted

Episperma Rafinesque, 1814 genus provisionally accepted

Episporium Möbius, 1885 genus accepted

Elisabethia Trevisan, 1855 genus accepted

Hollenbergia Wollaston, 1972 genus accepted

Heterothamnion J.Agardh, 1892 genus accepted

Microgelidiopsis Ercegovic, 1980 genus provisionally accepted

Morothamnion C. Cramer, 1862 genus accepted

Ossiella A.J.K. Millar & I.A. Abbott, 1997 genus accepted

Perischelia J.Agardh ex Kylin, 1956 genus accepted

Perikladosporon A. Athanasiadis, 1996 genus accepted

Seagriefia Stegenga, Bolton & Anderson, 1997 genus accepted

Tetrathamnion Wollaston, 1968 genus accepted

Sciurothamnion O. De Clecrk & G.T. Kraft in O. De Clerck, G.T. Kraft & E. Coppejans, 2002 genus accepted

Ochmapexus Womersley, 1998 genus accepted

Irtugovia Perestenko, 1994 genus accepted

Lasiothalia Harvey, 1855 genus accepted

Laurenciophila Stegenga, 1986 genus accepted

Leptoklonion A. Athanasiadis, 1996 genus accepted

Corallophila Weber-van Bosse, 1923 genus accepted

Dasyphila Sonder, 1845 genus accepted

Dohrniella Funk, 1922 genus accepted

Macrothamnion Wollaston, 1968 genus accepted

Gayliella T.O. Cho, L.J. McIvor & S.M. Boo in T.O. Cho, S.M. Boo, M.H. Hommersand, C.A. Maggs, L. McIvor et al., 2008 genus accepted

Gulsoniopsis Hommersand, 1963 genus accepted

Gymnothamnion J.Agardh, 1892 genus accepted

Halosia Cormaci & G.Furnari, 1994 genus accepted

Platythamnion J.Agardh, 1892 genus accepted

Plumariella Okamura, 1930 genus accepted

Poecilothamnion Nägeli, 1847 genus provisionally accepted

Pterocladiopsis Ercegovic, 1963 genus accepted

Pterothamnion Nägeli, 1855 genus accepted

Ptilothamniopsis P.S. Dixon, 1971 genus accepted

Radiathamnion E.M. Gordon-Mills & G.T. Kraft, 1981 genus accepted

Reinboldiella De Toni, 1895 genus accepted

Sympodothamnion Itono, 1977 genus accepted

Syringocolax Reinsch, 1875 genus accepted

Trithamnion Wollaston, 1968 genus accepted

Warrenia Harvey ex F.Schmitz & Hauptfleisch, 1897 genus accepted

Zonariophila Stegenga & Kemperman, 1996 genus accepted

Scagelia E.M. Wollaston, 1972 genus accepted

Scageliopsis E.M. Wollaston, 1981 genus accepted

Scagelothamnion A. Athanasiadis, 1996 genus accepted

Skeletonella A.J.K. Millar & O. De Clerck, 2007 genus accepted

Perithamnion J.Agardh, 1892 genus accepted

Sporacanthus Kützing, 1855 genus provisionally accepted

Sporoseira F.J. Ruprecht, 1851 genus accepted

Acrothamnion J.Agardh, 1892 genus accepted

Acrothamniopsis A. Athanasiadis & G.T. Kraft in A. Athanasiadis, 1996 genus accepted