Derbesiaceae Hauck, 1884 family accepted

Codiaceae Kützing, 1843 family accepted

Halimedaceae Link, 1832 family accepted

Pseudoudoteaceae Dragastan et al., 1997 family accepted

Ampullipora V.P. Shuysky, 1987 genus accepted

Rotella V.P. Shuysky, 1987 genus accepted

Semilancicula V.P. Shuysky, 1987 genus accepted

Kamaenella B.L. Mamet & A. Roux, 1975 genus provisionally accepted

Litanaella V.P. Shuysky & D.I. Schirschova in V.P. Shuysky, 1987 genus accepted

Courvoisiella K.J. Niklas, 1976 genus accepted

Cummingsella B. Mamet & A. Roux, 1980 genus accepted

Octaviona F.W. Sommer in F.W. Lange, 1954 genus accepted

Parabacella V.P. Shuysky & D.I. Schirschova in V.N. Dubatolov & T.A. Moskalenko, 1988 genus accepted

Parakamaena B.L. Mamet & A. Roux, 1975 genus accepted

Globosiphonia V.P. Shuysky in V.P. Shuysky & D.I. Schirschova in V.N. Dubatolov & T.A. Moskalenko, 1988 genus accepted

Patrunovia V.P. Shuysky in V.P. Shuysky & D.I. Schirschova in V.N. Dubatolov & T.A. Moskalenko, 1988 genus accepted

Taldykites B.I. Tchuvashov in B.I. Tchuvashov & A.L. Anfimov in V.N. Dubatolov & T.A. Moskalenko, 1988 genus accepted

Praelitanaia V.P. Shuysky, 1987 genus accepted

Caulerpaceae Kützing, 1843 family accepted

Chaetosiphonaceae Blackman & Tansley, 1902 family accepted

Uraloclibeca V.P. Shuysky & D.I. Schirschova in V.N. Dubatolov & T.A. Moskalenko, 1988 genus accepted

Dichotomosiphonaceae family accepted

Bryopsidaceae Bory de Saint-Vincent, 1829 family accepted

Smithsoniella J.R. Sears & S.H. Brawley, 1982 genus accepted

Sphaeroporella I.A. Antropov in A.P. Jousé, 1967 genus accepted

Spongioporella V.P. Shuysky & D.I. Schirschova in V.N. Dubatolov & T.A. Moskalenko, 1988 genus accepted

Ostreobiaceae P.C. Silva, 2007 family accepted

Protohalimedaceae Dragastan, Littler & Littler, 2002 family accepted

Pseudocodiaceae L. Hillis-Colinvaux family accepted

Rhipiliaceae family accepted

Udoteaceae J. Agardh, 1887 family accepted

Lanciculaceae Shuysky, 1987 family accepted