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

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

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

Exilicrusta Chamberlain, 1992 genus accepted

Phymatolithon Foslie, 1898 genus accepted

Lithothamnion Heydrich, 1897 genus accepted

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

Mastophoropsis Woelkerling, 1978 genus accepted

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

Choreonema F.Schmitz, 1889 genus accepted

Sphaeranthera Heydrich, 1900 genus provisionally accepted

Synarthrophyton R.A. Townsend, 1979 genus accepted

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