Arenigiphyllum R. Riding, J.C.W. Cope & P.D. Taylor, 1998 genus accepted

Lasneria J. Poncet & P. Morzadec, 1993 genus accepted

Halysis O.A. Høeg, 1932 genus accepted

Hydrolithaceae (A. Kato & M. Baba) R.A. Townsend & J.M. Huisman, 2018 family accepted

Lithophyllaceae (Setchell, 1943) A. Athanasiadis, 2016 family accepted

Porolithaceae R.A. Townsend & J.M. Huisman, 2018 family accepted

Spongitaceae Kützing, 1843 family accepted

Amphithallia A. Athanasiadis, 2019 genus accepted

Mesophyllumaceae C.W. Schneider & M.J. Wynne, 2019 family accepted

Corallinaceae Lamouroux, 1816 family accepted

Pseudochaetetes Haug, 1883 genus accepted

Solenoporella V.P. Shuysky in V.P. Shuysky & D.K. Patrunov, 1991 genus accepted

Mastophoraceae (Setchell, 1943) R.A. Townsend & J.M. Huisman, 2018 family accepted

Pseudosolenopora B. Mamet & A. Roux, 1977 genus accepted

Archaeolithophyllaceae Chuvashov, 1987 family accepted