Abacella pertusa Maslov, 1956 † (ecology source)
Acinaria coccifera Rafinesque, 1819 accepted as Nitella flexilis (Linnaeus) C.Agardh, 1824 (ecology source)
Acinaria flexuosa Rafinesque, 1819 accepted as Nitella acuminata A.Braun, 1849 (ecology source)
Acinaria latifolia Rafinesque, 1819 accepted as Nitella clavata Kützing, 1849 (ecology source)
Acinaria salicifolia Rafinesque, 1819 accepted as Nitella praelonga A.Braun, 1882 (ecology source)
Aclistochara brevis Shui Wang ex X.G.Zhou, 1983 † (ecology source)
Aclistochara datongheensis Zhenxin Wei, 1983 † (ecology source)
Aclistochara elongata R.E.Peck, 1937 † accepted as Aclistochara bransonii R.E.Peck, 1937 † (ecology source)
Aclistochara faceta Zhenxin Wei, 1983 † (ecology source)
Aclistochara firma Zhenxin Wei, 1983 † (ecology source)
Aclistochara fortis Zhenxin Wei, 1983 † (ecology source)
Aclistochara gulistanica (Kyansep-Romashkina) Feist-Castel & N.Grambast, 1991 † (ecology source)
Aclistochara hongguensis Zhenxin Wei, 1983 † (ecology source)
Aclistochara huangshuiensis G.D.Yang, 1983 † accepted as Aclistochara bransonii R.E.Peck, 1937 † (ecology source)
Aclistochara jimusaerensis J.Liu & X.Wu, 1985 † (ecology source)
Aclistochara lianmuxinensis J.Liu & X.Wu, 1985 † (ecology source)
Aclistochara longiconica Y.C.Hao, 1983 † (ecology source)
Aclistochara longiformis Shui Wang ex G.D.Yang, 1983 † (ecology source)
Aclistochara lufengensis (Zhi Wang, R.J.Huang & Shui Wang) Zhenxin Wei, G.D.Yang & X.G.Zhou, 1983 † accepted as Porochara westerbeckensis (Mädler) Mädler, 1955 (ecology source)
Aclistochara moreyi (R.E.Peck) R.E.Peck, 1937 † accepted as Porochara moreyi (R.E.Peck) Mädler, 1955 † (ecology source)
Aclistochara mundula R.E.Peck, 1941 † accepted as Porochara mundula (R.E.Peck) Shaikin, 1976 † (ecology source)
Aclistochara nana (Lu) Horn af Rantzien † (ecology source)
Aclistochara nuguishanensis (Z.Wang et al.) Y.C.Hao et al., 1983 † (ecology source)
Aclistochara sinkiangensis (Lu) Horn af Rantzien † (ecology source)
Aclistochara torulosa (Dollfus & Fritel) Grambast & Grambast † (ecology source)
Acutochara chinensis L.Ya.Sajdakovskij † (ecology source)
Acutochara gansuensis (Zhen Wang) L.Ya.Sajdakovskij † (ecology source)
Acutochara jimsarensis (H.N.Lu & Q.X.Luo) L.Ya.Sajdakovskij † (ecology source)
Acutochara turpanensis (H.N.Lu & S.Zhang) L.Ya.Sajdakovskij † (ecology source)
Agardhia areolata Ant.Cabrera, 1823 accepted as Codium decorticatum (Woodward) M.A.Howe, 1911 (ecology source)
Agardhia bursa (Linnaeus) Ant.Cabrera, 1823 accepted as Codium bursa (Olivi) C.Agardh, 1817 (ecology source)
Agardhia dichotoma Ant.Cabrera, 1823 accepted as Codium tomentosum Stackhouse, 1797 (ecology source)
Agardhia ramentacea Ant.Cabrera, 1823 accepted as Codium lineare C.Agardh, 1822 (ecology source)
Agardhia textilis Ant.Cabrera, 1823 accepted as Udotea flabelliformis (Desfontaines) P.L.Crouan & H.M.Crouan (ecology source)
Ahnfeldtia domingensis (Sprengel) Trevisan, 1849 (ecology source)
Ahnfeldtia racemosa (Forssk.) Trevisan (ecology source)
Ahnfeldtia sedoides (R.Brown) Trevisan (ecology source)
Ahnfeldtia uvifera (Turner) Trevisan (ecology source)
Amblyochara latifasciata (Peck) Grambast † (ecology source)
Amphikrikos buderi (Heynig) Hindák, 1977 (ecology source)
Amphikrikos variabilis Krienitz, 1998 (ecology source)
Aptogonum diagonum Delponte, 1876 accepted as Aptogonum caelatum var. diagonum (Delponte) Raciborski, 1885 (ecology source)
Arabicodium aegagrapiloides G.F.Elliott, 1957 † (ecology source)
Arabicodium elongatum Dragastan (ecology source)
Arabicodium jurassicum Dragastan (ecology source)
Arabicodium orientale Dragastan (ecology source)
Arabicodium texanum Johnson (ecology source)
Awadhiella indica B.N.Prasad & D.K.Asthana, 1979 (ecology source)
Botryella spinosa Shuysky & Schirschova, 1987 † accepted as Vitinella spinosa (Shuysky & Schirschova) Molinari & Sánchez Ocharan, 2021 † (ecology source)
Cerasterias irregularis G.M.Smith, 1926 (ecology source)
Cerasterias longispina (Perty) Reinsch, 1888 accepted as Asterothrix longispina (Perty) Printz, 1914 (ecology source)
Cerasterias nivalis Bohlin (ecology source)
Cerasterias staurastroides West & G.S.West, 1894 (ecology source)
Chaetosphaeridium minus (Hansgirg) G.S.West, 1904 (ecology source)
Chaetosphaeridium ovalis G.M.Smith, 1916 (ecology source)
Charites columnaria (S.Wang) † (ecology source)
Charites daxiaensis G.D.Yang, 1983 † (ecology source)
Charites hejiapensis Zhen Wang † (ecology source)
Chodatella circumfilata Seligo (ecology source)
Chodatella pilosa Hortobágyi, 1965 (ecology source)
Closterium karnakense Coesel (ecology source)
Codium crustaceum Schousboe (ecology source)
Coleochaete circularis H.Szymanska (ecology source)
Coleochaete echinocystis H.Szymanska, 1989 (ecology source)
Coleochaete prostrata Kützing (ecology source)
Coleochaete reptans (Düringer) A.K.M.N.Islam & M.R.Khan (ecology source)
Coleochaete sieminskiana H.Szymanska (ecology source)
Conochaete lichenicola Suessenguth (ecology source)
Corallina cristata Linnaeus, 1758 accepted as Jania rubens (Linnaeus) J.V.Lamouroux, 1816 (source of synonymy)
Corallina rubens Linnaeus, 1758 accepted as Jania rubens (Linnaeus) J.V.Lamouroux, 1816 (source of synonymy)
Cosmarium annulatum Delponte, 1877 (ecology source)
Cosmarium conicum West & G.S.West, 1895 (ecology source)
Cosmarium lobatum Børgesen, 1891 (ecology source)
Cosmarium planum West & G.S.West, 1895 (ecology source)
Cosmarium pseudadoxum C.-C.Jao (ecology source)
Cosmarium pseudobaronii N.Woodhead & R.D.Tweed, 1958 (ecology source)
Cosmarium pseudocellatum Hirano (ecology source)
Cosmarium pseudoregnesii West & G.S.West, 1895 (ecology source)
Cosmarium subauriculatum West & G.S.West, 1895 (ecology source)
Cosmarium sublatereundatum West & G.S.West, 1895 (ecology source)
Cosmarium submamillatum West & G.S.West, 1895 (ecology source)
Cosmarium subprotuberans West & G.S.West, 1895 (ecology source)
Cosmarium tripapillatum West & G.S.West, 1895 (ecology source)
Cosmarium vossenbergense Coesel & Van Westen, 2013 (ecology source)
Cosmarium zonarium West & G.S.West, 1895 (ecology source)
Cylindrocystis subglobosa Scott & R.L.Grönblad, 1957 (ecology source)
Dactylococcus bicaudata (ecology source)
Dactylococcus hookeri Reinsch, 1875 accepted as Characium hookeri (Reinsch) Hansgirg, 1888 (ecology source)
Dactylococcus infusionum Nägeli, 1849 (ecology source)
Dactylococcus infusionus Nägeli (ecology source)
Dactylococcus litoralis Hansgirg, 1890 accepted as Coenodispora litoralis (Hansgirg) I.Kostikov, T.Darienko, A.Lukesová & L.Hoffmann, 2002 (ecology source)
Dactylococcus obtusus Lagerheim, 1890 (ecology source)
Dicoleon nordstedtii Klebahn, 1893 (ecology source)
Didymocystis comasii Komárek, 1983 (ecology source)
Didymocystis costatodenticulata Hortobágyi (ecology source)
Didymocystis costatogranulata (Skuja) Skuja, 1964 accepted as Desmodesmus costatogranulatus (Skuja) E.Hegewald, 2000 (ecology source)
Didymocystis polonica Bucka, 1964 (ecology source)
Discocytis saturnus (Steinecke) Skuja (ecology source)
Docidium hirsutum Bailey, 1851 accepted as Pleurotaenium trabecula var. hirsutum (Bailey) Willi Krieger, 1937 (ecology source)
Docidium manubrium West & G.S.West, 1895 (ecology source)

Azores Canaries Madeira for Bryopsis cupressina var. adriatica (J.Agardh) M.J.Wynne, 2005 
Azores Canaries Madeira for Chaetomorpha aerea (Dillwyn) Kützing, 1849 
Azores Canaries Madeira for Chaetomorpha ligustica (Kützing) Kützing, 1849 
Azores Canaries Madeira for Chaetomorpha mediterranea (Kützing) Kützing, 1849 
Baltic Sea for Bryopsis cupressina var. adriatica (J.Agardh) M.J.Wynne, 2005 
Baltic Sea for Chaetomorpha aerea (Dillwyn) Kützing, 1849 
Baltic Sea for Chaetomorpha ligustica (Kützing) Kützing, 1849 
Baltic Sea for Chaetomorpha mediterranea (Kützing) Kützing, 1849 
Baltic Sea for Chaetomorpha melagonium (F.Weber & D.Mohr) Kützing, 1845 
Black Sea for Chaetomorpha aerea (Dillwyn) Kützing, 1849 
Black Sea for Chaetomorpha mediterranea (Kützing) Kützing, 1849 
Celtic Seas for Bryopsis cupressina var. adriatica (J.Agardh) M.J.Wynne, 2005 
Celtic Seas for Chaetomorpha aerea (Dillwyn) Kützing, 1849 
Celtic Seas for Chaetomorpha ligustica (Kützing) Kützing, 1849 
Celtic Seas for Chaetomorpha mediterranea (Kützing) Kützing, 1849 
Celtic Seas for Chaetomorpha melagonium (F.Weber & D.Mohr) Kützing, 1845 
Faroe Plateau for Bryopsis cupressina var. adriatica (J.Agardh) M.J.Wynne, 2005 
Faroe Plateau for Chaetomorpha aerea (Dillwyn) Kützing, 1849 
Faroe Plateau for Chaetomorpha ligustica (Kützing) Kützing, 1849 
Faroe Plateau for Chaetomorpha mediterranea (Kützing) Kützing, 1849 
Faroe Plateau for Chaetomorpha melagonium (F.Weber & D.Mohr) Kützing, 1845 
Mediterranean Sea for Bryopsis cupressina var. adriatica (J.Agardh) M.J.Wynne, 2005 
Mediterranean Sea for Chaetomorpha adrianii Feldmann, 1936 
Mediterranean Sea for Chaetomorpha aerea (Dillwyn) Kützing, 1849 
Mediterranean Sea for Chaetomorpha ligustica (Kützing) Kützing, 1849 
Mediterranean Sea for Chaetomorpha mediterranea (Kützing) Kützing, 1849 
North Sea for Bryopsis cupressina var. adriatica (J.Agardh) M.J.Wynne, 2005 
North Sea for Chaetomorpha aerea (Dillwyn) Kützing, 1849 
North Sea for Chaetomorpha ligustica (Kützing) Kützing, 1849 
North Sea for Chaetomorpha mediterranea (Kützing) Kützing, 1849 
North Sea for Chaetomorpha melagonium (F.Weber & D.Mohr) Kützing, 1845 
Northern Norway and Finnmark for Bryopsis cupressina var. adriatica (J.Agardh) M.J.Wynne, 2005 
Northern Norway and Finnmark for Chaetomorpha aerea (Dillwyn) Kützing, 1849 
Northern Norway and Finnmark for Chaetomorpha ligustica (Kützing) Kützing, 1849 
Northern Norway and Finnmark for Chaetomorpha mediterranea (Kützing) Kützing, 1849 
Northern Norway and Finnmark for Chaetomorpha melagonium (F.Weber & D.Mohr) Kützing, 1845 
Saharan Upwelling for Bryopsis cupressina var. adriatica (J.Agardh) M.J.Wynne, 2005 
Saharan Upwelling for Chaetomorpha aerea (Dillwyn) Kützing, 1849 
Saharan Upwelling for Chaetomorpha ligustica (Kützing) Kützing, 1849 
Saharan Upwelling for Chaetomorpha mediterranea (Kützing) Kützing, 1849 
South and West Iceland for Bryopsis cupressina var. adriatica (J.Agardh) M.J.Wynne, 2005 
South and West Iceland for Chaetomorpha aerea (Dillwyn) Kützing, 1849 
South and West Iceland for Chaetomorpha ligustica (Kützing) Kützing, 1849 
South and West Iceland for Chaetomorpha mediterranea (Kützing) Kützing, 1849 
South and West Iceland for Chaetomorpha melagonium (F.Weber & D.Mohr) Kützing, 1845 
South European Atlantic Shelf for Bryopsis cupressina var. adriatica (J.Agardh) M.J.Wynne, 2005 
South European Atlantic Shelf for Chaetomorpha aerea (Dillwyn) Kützing, 1849 
South European Atlantic Shelf for Chaetomorpha ligustica (Kützing) Kützing, 1849 
South European Atlantic Shelf for Chaetomorpha mediterranea (Kützing) Kützing, 1849 
Temperate Northern Atlantic for Bryopsis cupressina var. adriatica (J.Agardh) M.J.Wynne, 2005 
Temperate Northern Atlantic for Chaetomorpha adrianii Feldmann, 1936 
Temperate Northern Atlantic for Chaetomorpha aerea (Dillwyn) Kützing, 1849 
Temperate Northern Atlantic for Chaetomorpha ligustica (Kützing) Kützing, 1849 
Temperate Northern Atlantic for Chaetomorpha mediterranea (Kützing) Kützing, 1849 
Temperate Northern Atlantic for Chaetomorpha melagonium (F.Weber & D.Mohr) Kützing, 1845 

 Classification

 for Jania cristata (Linnaeus) Endlicher

It is still uncertain whether to consider Jania cristata as a separate species or as a variety of J. rubens. [details]