Crustaphytum L.-C.Liu & S.-M.Lin, 2018 genus accepted

Tectolithon Bahia, Jesionek & Amado-Filho genus accepted

Synarthropyton genus synonym

Agardhina Nardo, 1834 genus synonym

Melobesia J.V.F.Lamouroux, 1812 genus accepted

Apora Gunnerus, 1768 genus synonym

Boreolithon A.S.Harvey & W.J.Woelkerling, 1995 genus accepted

Epilithon Heydrich, 1897 genus synonym

Exilicrusta Chamberlain, 1992 genus accepted

Phymatolithon Foslie, 1898 genus accepted

Chaetolithon Foslie, 1898 genus synonym

Austrolithon A.S.Harvey & Woelkerling, 1995 genus doubtful

Sphaeranthera Heydrich, 1900 genus doubtful

Hapalidium Kützing, 1843 genus synonym

Synarthrophyton R.A.Townsend, 1979 genus accepted

Eleutherospora Heydrich, 1900 genus synonym

Squamolithon Heydrich, 1911 genus synonym

Choreonema F.Schmitz, 1889 genus accepted

Mastophoropsis Woelkerling, 1978 genus accepted

Nullipora J.B.de Lamarck, 1801 genus synonym

Phymatholithon genus synonym

Juergensia Reichenbach, 1841 genus doubtful

Endosiphonia Ardissone, 1883 genus synonym

Agardhia Meneghini, 1838 genus synonym

Epulo R.A.Townsend & J.M Huisman, 2004 genus doubtful

Lithothamnion Heydrich, 1897 genus accepted

Callilithophytum P.W.Gabrielson, W.H.Adey, G.P.Johnson & J.J.Hernandez-Kantun, 2015 genus accepted