Visheraia K.B.Korde, 1958 genus accepted

Shujana B.S.Sokolov, 1979 genus doubtful

Saranaella V.N.Dubatolov & T.A.Moskalenko, 1988 genus doubtful

Katavellaceae family accepted

Euspiros G.Targioni-Tozzetti ex F.J.Ruprecht, 1849 genus doubtful

Baccacoccum Y.Zhang, 1978 genus doubtful

Coronoides Y.Zhang, 1978 genus doubtful

Oligosiphonia J.Agardh genus doubtful

Stylonematophyceae class accepted

Ceramium Wiggers, 1780 genus doubtful

Buthotrephis Fenton, 1928 genus synonym

Laurentia (J.V.Lamouroux) S.F.Gray genus doubtful

Microsporium Nägeli, 1861 genus doubtful

Bisporium Nägeli genus doubtful

Cliftonea Harvey, 1863 genus doubtful

Vertebralia J.E.Gray genus doubtful

Litholepsis genus doubtful

Helminthostachya genus doubtful

Fuucs genus doubtful

Darvaziella Makhaev genus doubtful

Aspergina Chevallier genus doubtful

Pachydasya J.Agardh, 1890 genus doubtful

Phyllocladia J.Agardh genus doubtful

Trigenia genus doubtful

Buthotrepis Hall, 1847 genus synonym

Zaganolomia N.A.Drosdova, 1980 genus doubtful

Yendoella A.Mazza, 1926 genus doubtful

Thaiporella R.Endô, 1966 genus doubtful

Globulifer Roussel genus doubtful

Cretacicrusta G.F.Elliott, 1972 genus accepted

Lochmophycus M.H.Debey & C.von Ettingshausen, 1859 genus accepted

Getaeia O.Dragastan, 1973 genus accepted

Arthrosira R.Wollny, 1881 genus doubtful

Arthroporella Stolley genus accepted

Gelidinium M.H.Debey & C.von Ettingshausen, 1859 genus accepted

Pseudokomia L.Rácz, 1964 genus accepted

Pseudogelidium Schiffner, 1933 genus doubtful

Californiella J.Poncet, 1987 genus doubtful

Bythotrephis Schimper, 1869 genus synonym

Tomentulaceae family accepted

Valmeyeraphycus R.L.Leary, 1986 genus accepted

Serligiaceae family accepted

Pseudoanthaceae family accepted

Subtifloria V.P.Maslov, 1956 genus accepted

Potentillinaceae family accepted

Pasinia A.Massalongo, 1858 genus accepted

Parachabakoviaceae family accepted

Anomalophycus C.L.Fenton & M.A.Fenton genus accepted

Mucilinaceae family accepted

Menselina I.A.Antropov, 1967 genus accepted

Kundatiaceae family accepted

Kadvoyaceae family accepted

Honanellaceae family accepted

Chenilleophycus R.L.Leary, 1986 genus doubtful

Dasycirriphycus A.G.Vologdin, 1962 genus doubtful

Demidellaceae family accepted

Bassonia M.Kringer & H.Mayr, 2004 genus doubtful

Cornutulaceae family accepted

Chalicostroma Weber-van Bosse, 1911 genus doubtful

Manitobia W.L.Fry, 1983 genus doubtful

Chabakoviaceae family accepted

Cambrinaceae family accepted

Batineviaceae family accepted

Maimonachaetetes P.Cózar & D.Vachard, 2006 genus doubtful

Plectenchymella I.Kraicz, 1939 genus doubtful

Dasythamnion P genus doubtful

Bangiophyceae class accepted

Diademus genus doubtful

Callymenia genus doubtful

Gloiodermis genus doubtful

Desmsia genus doubtful

Desmia J.Agardh, 1852 genus doubtful

Rhodophyceae family synonym

Buthotrephis J.Hall, 1847 genus doubtful

Qataria C.F.Reed, 1969 genus doubtful

Muda M.Adanson, 1763 genus doubtful

Flabellinaceae family accepted

Proauloporaceae family accepted

Heterocladium Nägeli genus doubtful

Acanthinaceae family accepted

Fistulellaceae family accepted

Moniliporellaceae family accepted

Sajaniaceae family accepted

Umbellula K.B.Korde genus accepted

Erbinaceae family accepted

Pustulariaceae family accepted

Cyanidiophyceae class accepted

Compsopogonophyceae class accepted

Florideophyceae class accepted

Rhodellophyceae class accepted

Alga Adanson, 1763 genus doubtful

Guangxilamina Wu, 1991 genus accepted

Paraepiphyton Wray genus doubtful

Rhodophyceae class accepted

Stereocaulon J.D.Hooker & Harvey genus doubtful

Porphyridiophyceae class accepted

Acanthocladia Ardissone, 1886 genus doubtful

Endocricosphaera Y.Zhang, 1978 genus doubtful

Centrocarya Y.Zhang, 1978 genus doubtful

Archaeolithophyllales order accepted

Johnstonia genus doubtful

Erinacea J.V.Lamouroux, 1824 genus doubtful

Dasyclonia Kützing genus doubtful

Polyspermum (G.G.A.Meneghini) V.B.A.Trevisan de Saint-Léon genus doubtful

Stacheinaceae family accepted