Acrochaete N.Pringsheim, 1862 accepted as Ulvella P.L.Crouan & H.M.Crouan, 1859 (basis of record)
Acrochaete heteroclada J.A.Correa & R.Nielsen, 1988 accepted as Ulvella heteroclada (Correa & R.Nielsen)R.Nielsen, C.J.O'Kelly & B.Wysor, 2013 (basis of record)
Acrochaete leptochaete (Huber) R.Nielsen, 1983 accepted as Ulvella leptochaete (Huber) R.Nielsen, C.J.O'Kelly & B.Wysor, 2013 (basis of record)
Acrochaete operculata J.A.Correa & R.Nielsen, 1988 accepted as Ulvella operculata (Correa & R.Nielsen) R.Nielsen, C.J.O'Kelly & B.Wysor, 2013 (basis of record)
Acrochaete repens Pringsheim, 1862 accepted as Ulvella repens (Pringsheim) R.Nielsen, C.J.O'Kelly & B.Wysor, 2013 (basis of record)
Acrochaete viridis (Reinke) R.Nielsen, 1979 accepted as Ulvella viridis (Reinke) R.Nielsen, C.J.O'Kelly & B.Wysor, 2013 (basis of record)
Acrochaete wittrockii (Wille) R.Nielsen, 1983 accepted as Ulvella wittrockii (Wille) R.Nielsen, C.J.O'Kelly & B.Wysor, 2013 (basis of record)
Acrochaetiaceae Melchior, 1954 (basis of record)
Acrochaetiales (basis of record)
Acrochaetium Nägeli, 1858 (basis of record)
Acrochaetium alariae (Jónsson) Bornet, 1904 (basis of record)
Acrochaetium efflorescens (J.Agardh) Nägeli, 1861 accepted as Grania efflorescens (J.Agardh) Kylin, 1944 (basis of record)
Acrochaetium humile (Rosenvinge) Børgesen, 1915 (basis of record)
Acrochaetium microscopicum (Nägeli ex Kützing) Nägeli, 1858 (basis of record)
Acrochaetium savianum (Meneghini) Nägeli, 1862 accepted as Colaconema savianum (Meneghini) R.Nielsen, 1994 (basis of record)
Acrochaetium secundatum (Lyngbye) Nägeli, 1858 (basis of record)
Acrochaetium virgatulum (Harvey) Batters, 1902 accepted as Acrochaetium secundatum (Lyngbye) Nägeli, 1858 (basis of record)
Acrosiphonia J.Agardh, 1846 (basis of record)
Acrosiphonia arcta (Dillwyn) Gain, 1912 (basis of record)
Acrosiphonia sonderi (Kützing) Kornmann, 1962 (basis of record)
Acrosiphonia spinescens (Kützing) Kjellman, 1893 (basis of record)
Acrosiphoniaceae S. Jónsson, 1959 (additional source)
Acrothrix Kylin, 1907 (basis of record)
Acrothrix gracilis Kylin, 1907 (basis of record)
Agardhiella F.Schmitz, 1897 (basis of record)
Agardhiella subulata (C.Agardh) Kraft & M.J.Wynne, 1979 (additional source)
Aglaothamnion Feldmann-Mazoyer, 1941 (basis of record)
Ahnfeltia Fries, 1836 (basis of record)
Ahnfeltia plicata (Hudson) E.M.Fries, 1836 (basis of record)
Ahnfeltiaceae Maggs & Pueschel, 1989 (basis of record)
Ahnfeltiales (basis of record)
Alaria Greville, 1830 (basis of record)
Alaria esculenta (Linnaeus) Greville, 1830 (basis of record)
Alaria grandifolia J.Agardh, 1872 accepted as Alaria esculenta (Linnaeus) Greville, 1830 (basis of record)
Alariaceae Setchell & Gardner, 1925 (basis of record)
Antithamnion Nägeli, 1847 (basis of record)
Antithamnion cruciatum (C.Agardh) Nägeli, 1847 (basis of record)
Antithamnionella Lyle, 1922 (basis of record)
Antithamnionella floccosa (O.F.Müller) Whittick, 1980 (basis of record)
Arthrocladia Duby, 1830 (basis of record)
Arthrocladia villosa (Hudson) Duby, 1830 (basis of record)
Arthrocladiaceae Chauvin, 1842 (basis of record)
Ascocyclus Magnus, 1874 (basis of record)
Ascocyclus orbicularis (J.Agardh) Kjellman, 1890 (basis of record)
Ascophyllum Stackhouse, 1809 (basis of record)
Ascophyllum nodosum (Linnaeus) Le Jolis, 1863 (basis of record)
Asperococcus J.V.Lamouroux, 1813 (basis of record)
Asperococcus fistulosus (Hudson) W.J.Hooker, 1833 (basis of record)
Audouinella Bory de Saint-Vincent, 1823 (basis of record)
Bangia Lyngbye, 1819 (basis of record)
Bangiaceae Duby, 1830 (basis of record)
Blastophysa Reinke, 1889 (basis of record)
Blastophysa rhizopus Reinke, 1889 (basis of record)
Blidingia Kylin, 1947 (basis of record)
Blidingia chadefaudii (Feldmann) Bliding, 1963 (basis of record)
Blidingia marginata (J.Agardh) P.J.L.Dangeard ex Bliding, 1963 (basis of record)
Blidingia minima (Nägeli ex Kützing) Kylin, 1947 (basis of record)
Blidingia ramifera (Bliding) Garbary & L.B.Barkhouse, 1987 (basis of record)
Bolbocoleon Pringsheim, 1863 (basis of record)
Bolbocoleon piliferum Pringsheim, 1862 (basis of record)
Bonnemaisonia C.Agardh, 1822 (basis of record)
Bonnemaisonia hamifera Hariot, 1891 (basis of record)
Bonnemaisoniaceae Schmitz, 1892 (basis of record)
Bonnemaisoniales (additional source)
Bostrychia Montagne, 1842 (basis of record)
Botrytella Bory de Saint-Vincent, 1822 (basis of record)
Botrytella micromora Bory, 1822 (basis of record)
Bryopsidaceae Bory de Saint-Vincent, 1829 (basis of record)
Bryopsis J.V.Lamouroux, 1809 (basis of record)
Bryopsis hypnoides J.V.Lamouroux, 1809 (basis of record)
Bryopsis plumosa (Hudson) C.Agardh, 1823 (basis of record)
Callithamnion Lyngbye, 1819 (basis of record)
Callithamnion corymbosum (Smith) Lyngbye, 1819 (basis of record)
Callithamnion tetragonum (Stackhouse) S.F.Gray, 1821 (basis of record)
Callocolax F.Schmitz ex Batters, 1895 (basis of record)
Callophyllis Kützing, 1843 (basis of record)
Callophyllis cristata (C.Agardh) Kützing, 1849 accepted as Euthora cristata (C.Agardh) J.Agardh, 1847 (basis of record)
Capsosiphon Gobi, 1879 (basis of record)
Capsosiphon fulvescens (C.Agardh) Setchell & N.L.Gardner, 1920 (basis of record)
Capsosiphonaceae V.J. Chapman, 1952 (basis of record)
Caulerpales (basis of record)
Ceramiaceae Dumortier, 1822 (basis of record)
Ceramiales (basis of record)
Ceramium Roth, 1797 (basis of record)
Ceramium cimbricum H.E.Petersen, 1924 (basis of record)
Ceramium circinatum (Kützing) J.Agardh, 1851 (basis of record)
Ceramium deslongchampsii Chauvin ex Duby, 1830 (basis of record)
Ceramium diaphanum (Lightfoot) Roth, 1806 (basis of record)
Ceramium rubrum C.Agardh, 1811 accepted as Ceramium virgatum Roth, 1797 (basis of record)
Ceramium siliquosum (Kützing) Maggs & Hommersand, 1993 (basis of record)
Ceramium tenuicorne (Kützing) Waern, 1952 (basis of record)
Ceratocolax Rosenvinge, 1898 (basis of record)
Ceratocolax hartzii Rosenvinge, 1898 accepted as Coccotylus hartzii (Rosenvinge) Le Gall & G.W.Saunders, 2010 (basis of record)
Chaetomorpha Kützing, 1845 (basis of record)
Chaetomorpha aerea (Dillwyn) Kützing, 1849 (basis of record)
Chaetomorpha linum (O.F.Müller) Kützing, 1845 (basis of record)
Chaetomorpha melagonium (F.Weber & D.Mohr) Kützing, 1845 (basis of record)
Chaetophoraceae Greville, 1824 (basis of record)
Chaetosiphonaceae Blackman & Tansley, 1902 (basis of record)
Champia Desvaux, 1809 (basis of record)

European waters (ERMS scope) for Acrochaete heteroclada J.A.Correa & R.Nielsen, 1988 
European waters (ERMS scope) for Acrochaete leptochaete (Huber) R.Nielsen, 1983 
European waters (ERMS scope) for Acrochaete operculata J.A.Correa & R.Nielsen, 1988 
European waters (ERMS scope) for Acrochaete repens Pringsheim, 1862 
European waters (ERMS scope) for Acrochaete viridis (Reinke) R.Nielsen, 1979 
European waters (ERMS scope) for Acrochaete wittrockii (Wille) R.Nielsen, 1983 
European waters (ERMS scope) for Acrochaetium alariae (Jónsson) Bornet, 1904 
European waters (ERMS scope) for Acrochaetium efflorescens (J.Agardh) Nägeli, 1861 
European waters (ERMS scope) for Acrochaetium humile (Rosenvinge) Børgesen, 1915 
European waters (ERMS scope) for Acrochaetium microscopicum (Nägeli ex Kützing) Nägeli, 1858 
European waters (ERMS scope) for Acrochaetium savianum (Meneghini) Nägeli, 1862 
European waters (ERMS scope) for Acrochaetium secundatum (Lyngbye) Nägeli, 1858 
European waters (ERMS scope) for Acrochaetium virgatulum (Harvey) Batters, 1902 
European waters (ERMS scope) for Acrosiphonia arcta (Dillwyn) Gain, 1912 
European waters (ERMS scope) for Acrosiphonia sonderi (Kützing) Kornmann, 1962 
European waters (ERMS scope) for Acrosiphonia spinescens (Kützing) Kjellman, 1893 
European waters (ERMS scope) for Acrothrix gracilis Kylin, 1907 
European waters (ERMS scope) for Agardhiella subulata (C.Agardh) Kraft & M.J.Wynne, 1979 
European waters (ERMS scope) for Ahnfeltia plicata (Hudson) E.M.Fries, 1836 
European waters (ERMS scope) for Alaria esculenta (Linnaeus) Greville, 1830 
European waters (ERMS scope) for Alaria grandifolia J.Agardh, 1872 
European waters (ERMS scope) for Antithamnion cruciatum (C.Agardh) Nägeli, 1847 
European waters (ERMS scope) for Antithamnionella floccosa (O.F.Müller) Whittick, 1980 
European waters (ERMS scope) for Arthrocladia villosa (Hudson) Duby, 1830 
European waters (ERMS scope) for Ascocyclus orbicularis (J.Agardh) Kjellman, 1890 
European waters (ERMS scope) for Ascophyllum nodosum (Linnaeus) Le Jolis, 1863 
European waters (ERMS scope) for Asperococcus fistulosus (Hudson) W.J.Hooker, 1833 
European waters (ERMS scope) for Blastophysa rhizopus Reinke, 1889 
European waters (ERMS scope) for Blidingia chadefaudii (Feldmann) Bliding, 1963 
European waters (ERMS scope) for Blidingia marginata (J.Agardh) P.J.L.Dangeard ex Bliding, 1963 
European waters (ERMS scope) for Blidingia minima (Nägeli ex Kützing) Kylin, 1947 
European waters (ERMS scope) for Blidingia ramifera (Bliding) Garbary & L.B.Barkhouse, 1987 
European waters (ERMS scope) for Bolbocoleon piliferum Pringsheim, 1862 
European waters (ERMS scope) for Bonnemaisonia hamifera Hariot, 1891 
European waters (ERMS scope) for Botrytella micromora Bory, 1822 
European waters (ERMS scope) for Bryopsis hypnoides J.V.Lamouroux, 1809 
European waters (ERMS scope) for Bryopsis plumosa (Hudson) C.Agardh, 1823 
European waters (ERMS scope) for Callithamnion corymbosum (Smith) Lyngbye, 1819 
European waters (ERMS scope) for Callithamnion tetragonum (Stackhouse) S.F.Gray, 1821 
European waters (ERMS scope) for Callophyllis cristata (C.Agardh) Kützing, 1849 
European waters (ERMS scope) for Capsosiphon fulvescens (C.Agardh) Setchell & N.L.Gardner, 1920 
European waters (ERMS scope) for Ceramium cimbricum H.E.Petersen, 1924 
European waters (ERMS scope) for Ceramium circinatum (Kützing) J.Agardh, 1851 
European waters (ERMS scope) for Ceramium deslongchampsii Chauvin ex Duby, 1830 
European waters (ERMS scope) for Ceramium diaphanum (Lightfoot) Roth, 1806 
European waters (ERMS scope) for Ceramium rubrum C.Agardh, 1811 
European waters (ERMS scope) for Ceramium siliquosum (Kützing) Maggs & Hommersand, 1993 
European waters (ERMS scope) for Ceramium tenuicorne (Kützing) Waern, 1952 
European waters (ERMS scope) for Ceratocolax hartzii Rosenvinge, 1898 
European waters (ERMS scope) for Chaetomorpha aerea (Dillwyn) Kützing, 1849 
European waters (ERMS scope) for Chaetomorpha linum (O.F.Müller) Kützing, 1845 
European waters (ERMS scope) for Chaetomorpha melagonium (F.Weber & D.Mohr) Kützing, 1845 
European waters (ERMS scope) for Champia parvula (C.Agardh) Harvey, 1853 
European waters (ERMS scope) for Chilionema reptans (P.L.Crouan & H.M.Crouan) Sauvageau, 1897 
European waters (ERMS scope) for Chlorochytrium cohnii E.P.Wright, 1877 
European waters (ERMS scope) for Chlorochytrium dermatocolax Reinke, 1889 
European waters (ERMS scope) for Chondria dasyphylla (Woodward) C.Agardh, 1817 
European waters (ERMS scope) for Chondrus crispus Stackhouse, 1797 
European waters (ERMS scope) for Chorda filum (Linnaeus) Stackhouse, 1797 
European waters (ERMS scope) for Chordaria flagelliformis (O.F.Müller) C.Agardh, 1817 
European waters (ERMS scope) for Choreocolax polysiphoniae Reinsch, 1875 
European waters (ERMS scope) for Chroodactylon ornatum (C.Agardh) Basson, 1979 
European waters (ERMS scope) for Cladophora albida (Nees) Kutzing, 1843 
European waters (ERMS scope) for Cladophora crystallina (Roth) Kützing, 1843 
European waters (ERMS scope) for Cladophora dalmatica Kützing, 1843 
European waters (ERMS scope) for Cladophora fracta (O.F.Müller ex Vahl) Kützing, 1843 
European waters (ERMS scope) for Cladophora globulina (Kützing) Kützing, 1845 
European waters (ERMS scope) for Cladophora laetevirens (Dillwyn) Kützing, 1843 
European waters (ERMS scope) for Cladophora liniformis Kützing, 1849 
European waters (ERMS scope) for Cladophora pygmaea Reinke, 1888 
European waters (ERMS scope) for Cladophora ruchingeri (C.Agardh) Kützing, 1845 
European waters (ERMS scope) for Cladophora rupestris (Linnaeus) Kützing, 1843 
European waters (ERMS scope) for Cladophora sericea (Hudson) Kützing, 1843 
European waters (ERMS scope) for Cladophora vagabunda (Linnaeus) Hoek, 1963 
European waters (ERMS scope) for Cladosiphon zosterae (J.Agardh) Kylin, 1940 
European waters (ERMS scope) for Cladostephus spongiosus (Hudson) C.Agardh, 1817 
European waters (ERMS scope) for Clathromorphum circumscriptum (Strömfelt) Foslie, 1898 
European waters (ERMS scope) for Clathromorphum compactum (Kjellman) Foslie, 1898 
European waters (ERMS scope) for Coccotylus truncatus (Pallas) M.J.Wynne & J.N.Heine, 1992 
European waters (ERMS scope) for Codium fragile (Suringar) Hariot, 1889 
European waters (ERMS scope) for Coilodesme bulligera Strömfelt, 1886 
European waters (ERMS scope) for Colpomenia peregrina Sauvageau, 1927 
European waters (ERMS scope) for Corallina officinalis Linnaeus, 1758 
European waters (ERMS scope) for Cystoclonium purpureum (Hudson) Batters, 1902 
European waters (ERMS scope) for Dasya baillouviana (S.G.Gmelin) Montagne, 1841 
European waters (ERMS scope) for Delamarea attenuata (Kjellman) Rosenvinge, 1893 
European waters (ERMS scope) for Derbesia marina (Lyngbye) Solier, 1846 
European waters (ERMS scope) for Dermatocelis laminariae Rosenvinge, 1898 
European waters (ERMS scope) for Desmarestia aculeata (Linnaeus) J.V.Lamouroux, 1813 
European waters (ERMS scope) for Desmarestia viridis (O.F.Müller) J.V.Lamouroux, 1813 
European waters (ERMS scope) for Devaleraea ramentacea (Linnaeus) Guiry, 1982 
European waters (ERMS scope) for Dictyosiphon chordaria Areschoug, 1847 
European waters (ERMS scope) for Dictyosiphon ekmanii Areschoug, 1875 
European waters (ERMS scope) for Dictyosiphon foeniculaceus (Hudson) Greville, 1830 
European waters (ERMS scope) for Dilsea integra (Kjellman) Rosenvinge, 1898 
European waters (ERMS scope) for Dumontia contorta (S.G.Gmelin) Ruprecht, 1850 
European waters (ERMS scope) for Ectocarpus fasciculatus Harvey, 1841 
European waters (ERMS scope) for Ectocarpus siliculosus (Dillwyn) Lyngbye, 1819 
European waters (ERMS scope) for Elachista chondrii Areschoug, 1875 
European waters (ERMS scope) for Elachista fucicola (Velley) Areschoug, 1842 

 Spelling

 for Lithophyllum duckerae Woelkerling, 1983

Lithophyllum duckeri Woelkerling, 1983 [details]

 Spelling

 for Lithophyllum vickersii M.Lemoine

Lithophyllum vickersiae M. Lemoine, 1929 [details]

 Taxonomy

 for Coccomyxa Schmidle, 1901

Also in database as valid genus in Myxidiidae (Myxospora)-needs checking [details]

 Taxonomy

 for Saccorhiza Bachelot de la Pylaie, 1830

Also in database as valid genus in Hippocrepinidae [details]