Aristoptilon M.H.Hommersand & W.A.Nelson, 2006 genus accepted

Heteroptilon M.H.Hommersand, 2006 genus doubtful

Carpothamnium genus synonym

Gaillona Bonnemaison, 1828 genus accepted

Dorythamnion Nägeli, 1861 genus synonym

Leptothamnion Kützing, 1849 genus synonym

Ceratothamnion J.Agardh, 1892 genus synonym

Nwynea R.B.Searles, 1989 genus doubtful

Carpothamnion Kützing, 1849 genus doubtful

Seirospora Harvey, 1846 genus accepted

Rhodocallis Kützing, 1847 genus doubtful

Gattya Harvey, 1855 genus doubtful

Aglaothamnion G.Feldman-Mazoyer, 1941 genus accepted

Hirsutithallia E.M.Wollaston & H.B.S.Womersley, 1998 genus doubtful

Crouaniella A.Athanasiadis, 1996 genus synonym

Crouanophycus A.Athanasiadis, 1998 genus accepted

Falklandiella Kylin, 1956 genus doubtful

Maschalosporium Nägeli, 1862 genus doubtful

Psilothallia F.Schmitz, 1896 genus doubtful

Ptilocladia Sonder, 1845 genus accepted

Crouania J.Agardh, 1842 genus accepted

Euptilota (Kützing) Kützing, 1849 genus accepted

Thamnocarpus Harvey, 1844 genus synonym

Pseudocrouania Funk, 1955 genus synonym

Aristothamnion J.Agardh, 1892 genus synonym

Crouaniopsis J.Feldmann & G.Feldmann, 1940 genus synonym

Diapse Kylin, 1956 genus doubtful

Callithamnion Lyngbye, 1819 genus accepted

Gulsonia Harvey, 1855 genus accepted

Euptilocladia Wollaston, 1968 genus doubtful

Phlebothamnion Kützing, 1843 genus synonym

Pseudospora Schiffner, 1931 genus doubtful

Grateloupia Bonnemaison, 1822 genus synonym

Microthamnion J.Agardh, 1892 genus synonym

Dasythamnion Nägeli, 1862 genus synonym