• Acrochaetium alariae (Jónsson) Bornet, 1904
• Acrochaetium efflorescens (J.Agardh) Nägeli, 1861 accepted as Grania efflorescens (J.Agardh) Kylin, 1944
• Acrochaetium humile (Rosenvinge) Børgesen, 1915
• Acrochaetium microscopicum (Nägeli ex Kützing) Nägeli, 1858
• Acrochaetium savianum (Meneghini) Nägeli, 1862 accepted as Colaconema savianum (Meneghini) R.Nielsen, 1994
• Acrochaetium secundatum (Lyngbye) Nägeli, 1858
• Acrochaetium virgatulum (Harvey) Batters, 1902 accepted as Acrochaetium secundatum (Lyngbye) Nägeli, 1858
• Agardhiella subulata (C.Agardh) Kraft & M.J.Wynne, 1979
• Aglaothamnion halliae (Collins) Aponte, D.L.Ballantine & J.N.Norris, 1997
• Ahnfeltia plicata (Hudson) E.M.Fries, 1836
• Antithamnion americanum (Harvey) Kjellman, 1883 accepted as Scagelia americana (Harvey) Athanasiadis, 1996
• Antithamnion cruciatum (C.Agardh) Nägeli, 1847
• Antithamnion pylaisaei (Montagne) Kjellman, 1883 accepted as Scagelia pylaisaei (Montagne) M.J.Wynne, 1985
• Antithamnionella floccosa (O.F.Müller) Whittick, 1980
• Antithamnionella pylaisaei (Mont.) Kjellm. accepted as Antithamnion pylaisaei (Montagne) Kjellman, 1883 accepted as Scagelia pylaisaei (Montagne) M.J.Wynne, 1985
• Audouinella alariae (Jónsson) Woelkerling, 1973 accepted as Acrochaetium alariae (Jónsson) Bornet, 1904
• Audouinella dasyae (Collins) Woelkerling, 1973 accepted as Colaconema dasyae (Collins) Stegenga, I.Mol, Prud'homme & Lokhorst, 1997
• Audouinella daviesii (Dillwyn) Woelkerling, 1971 accepted as Colaconema daviesii (Dillwyn) Stegenga, 1985
• Audouinella efflorescens (J.Agardh) Papenfuss, 1945 accepted as Grania efflorescens (J.Agardh) Kylin, 1944
• Audouinella humilis (Rosenv.) Garbary accepted as Acrochaetium humile (Rosenvinge) Børgesen, 1915
• Audouinella membranacea (Magnus) Papenfuss, 1945 accepted as Rubrointrusa membranacea (Magnus) S.L.Clayden & G.W.Saunders, 2010
• Audouinella microscopica (Nägeli ex Kützing) Woelkerling, 1971 accepted as Acrochaetium microscopicum (Nägeli ex Kützing) Nägeli, 1858
• Audouinella polyides (Rosenv.) Garbary accepted as Audouinella polyidis (Rosenvinge) Garbary, 1979 accepted as Helminthora divaricata (C.Agardh) J.Agardh, 1852
• Audouinella polyidis (Rosenvinge) Garbary, 1979 accepted as Helminthora divaricata (C.Agardh) J.Agardh, 1852
• Audouinella purpurea (Lightfoot) Woelkerling, 1973 accepted as Rhodochorton purpureum (Lightfoot) Rosenvinge, 1900
• Audouinella saviana (Meneghini) Woelkerling, 1973 accepted as Colaconema savianum (Meneghini) R.Nielsen, 1994
• Audouinella secundata (Lyngbye) P.S.Dixon, 1976 accepted as Acrochaetium secundatum (Lyngbye) Nägeli, 1858
• Audouinella spetsbergensis (Kjellman) Woelkerling, 1973 accepted as Meiodiscus spetsbergensis (Kjellman) G.W.Saunders & McLachlan, 1991
• Audouinella virgatula (Harvey) P.S.Dixon, 1976 accepted as Acrochaetium secundatum (Lyngbye) Nägeli, 1858
• Bangia fuscopurpurea (Dillwyn) Lyngbye, 1819
• Bonnemaisonia hamifera Hariot, 1891
• Bostrychia radicans (Montagne) Montagne, 1842
• Callithamnion corymbosum (Smith) Lyngbye, 1819
• Callithamnion tetragonum (Stackhouse) S.F.Gray, 1821
• Callocolax fungiformis Kylin, 1925
• Callophyllis cristata (C.Agardh) Kützing, 1849 accepted as Euthora cristata (C.Agardh) J.Agardh, 1847
• Carradoriella denudata (Dillwyn) Savoie & G.W.Saunders, 2019
• Carradoriella elongata (Hudson) Savoie & G.W.Saunders, 2019
• Ceramium cimbricum H.E.Petersen, 1924
• Ceramium circinatum (Kützing) J.Agardh, 1851
• Ceramium deslongchampsii Chauvin ex Duby, 1830
• Ceramium diaphanum (Lightfoot) Roth, 1806
• Ceramium diaphanum var. elegans (Roth) Roth, 1806 accepted as Ceramium siliquosum var. elegans (Roth) G.Furnari, 1999
• Ceramium elegans (Roth) Ducluzeau, 1805 accepted as Ceramium siliquosum var. elegans (Roth) G.Furnari, 1999
• Ceramium rubrum C.Agardh, 1811 accepted as Ceramium virgatum Roth, 1797
• Ceramium siliquosum (Kützing) Maggs & Hommersand, 1993
• Ceramium siliquosum var. elegans (Roth) G.Furnari, 1999
• Ceramium strictum (Kützing) Rabenhorst, 1847 accepted as Ceramium deslongchampsii Chauvin ex Duby, 1830
• Ceramium strictum Greville & Harvey, 1846 accepted as Ceramium tenuicorne (Kützing) Waern, 1952
• Ceramium tenuicorne (Kützing) Waern, 1952
• Ceramium virgatum Roth, 1797
• Ceratocolax hartzii Rosenvinge, 1898 accepted as Coccotylus hartzii (Rosenvinge) Le Gall & G.W.Saunders, 2010
• Champia parvula (C.Agardh) Harvey, 1853
• Chondria baileyana (Montagne) Harvey, 1853
• Chondria dasyphylla (Woodward) C.Agardh, 1817
• Chondrus crispus Stackhouse, 1797
• Choreocolax polysiphoniae Reinsch, 1875
• Choreocolax rabenhorstii Reinsch, 1875
• Chroodactylon ornatum (C.Agardh) Basson, 1979
• Clathromorphum circumscriptum (Strömfelt) Foslie, 1898
• Clathromorphum compactum (Kjellman) Foslie, 1898
• Coccotylus hartzii (Rosenvinge) Le Gall & G.W.Saunders, 2010
• Coccotylus truncatus (Pallas) M.J.Wynne & J.N.Heine, 1992
• Colaconema dasyae (Collins) Stegenga, I.Mol, Prud'homme & Lokhorst, 1997
• Colaconema daviesii (Dillwyn) Stegenga, 1985
• Colaconema membranacea (Magnus) Woelkerling, 1973
• Colaconema polyidis (Rosenvinge) Woelkerling, 1971 accepted as Helminthora divaricata (C.Agardh) J.Agardh, 1852
• Colaconema savianum (Meneghini) R.Nielsen, 1994
• Colaconema secundatum (Lyngbye) Woelkerling, 1973 accepted as Acrochaetium secundatum (Lyngbye) Nägeli, 1858
• Corallina officinalis Linnaeus, 1758
• Cruoria arctica F.Schmitz, 1893 accepted as Turnerella pennyi (Harvey) F.Schmitz, 1893
• Cruoriopsis ensis Jao, 1936 accepted as Cruoriopsis ensisae C.-C.Jao, 1936
• Cruoriopsis ensisae C.-C.Jao, 1936
• Cystoclonium purpureum (Hudson) Batters, 1902
• Dasya baillouviana (S.G.Gmelin) Montagne, 1841
• Dermatolithon pustulatum (J.V.Lamouroux) Foslie, 1898 accepted as Titanoderma pustulatum (J.V.Lamouroux) Nägeli, 1858
• Devaleraea ramentacea (Linnaeus) Guiry, 1982
• Dilsea integra (Kjellman) Rosenvinge, 1898 accepted as Dilsea socialis (Postels & Ruprecht) Perestenko, 1996
• Dilsea socialis (Postels & Ruprecht) Perestenko, 1996
• Dumontia contorta (S.G.Gmelin) Ruprecht, 1850
• Dumontia incrassata (O.F.Müller) J.V.Lamouroux, 1813 accepted as Dumontia contorta (S.G.Gmelin) Ruprecht, 1850
• Enigma aculeata Daugbjerg & Vørs, 1994
• Erythrocladia irregularis Rosenvinge, 1909
• Erythrodermis traillii (Holmes ex Batters) Guiry & Garbary, 1990
• Erythrotrichia carnea (Dillwyn) J.Agardh, 1883
• Euthora cristata (C.Agardh) J.Agardh, 1847
• Fimbrifolium dichotomum (Lepechin) G.I.Hansen, 1980
• Furcellaria lumbricalis (Hudson) J.V.Lamouroux, 1813
• Gelidium crinale (Hare ex Turner) Gaillon, 1828
• Gelidium pusillum (Stackhouse) Le Jolis, 1863
• Gloiosiphonia capillaris (Hudson) Carmichael, 1833
• Goniotrichium alsidii (Zanardini) M.A. Howe, 1914 accepted as Goniotrichum alsidii (Zanardini) M.A.Howe, 1914 accepted as Stylonema alsidii (Zanardini) K.M.Drew, 1956
• Goniotrichum alsidii (Zanardini) M.A.Howe, 1914 accepted as Stylonema alsidii (Zanardini) K.M.Drew, 1956
• Gracilaria tikvahiae McLachlan, 1979
• Grania efflorescens (J.Agardh) Kylin, 1944
• Griffithsia globulifera Harvey ex Kützing, 1862
• Gymnogongrus crenulatus (Turner) J.Agardh, 1851
• Haemescharia hennedyi (Harvey) K.L.Vinogradova & Yacovleva, 1989
• Halosacciocolax kjellmanii S.Lund, 1959 accepted as Rhodophysema lundii (Edelstein) C.W.Schneider & M.J.Wynne, 2019
• Halosacciocolax lundii Edelstein, 1972 accepted as Rhodophysema lundii (Edelstein) C.W.Schneider & M.J.Wynne, 2019