Antithamnion cruciatum (C.Agardh) Nägeli, 1847 (additional source)
Audouinella daviesii (Dillwyn) Woelkerling, 1971 accepted as Colaconema daviesii (Dillwyn) Stegenga, 1985 (basis of record)
Audouinella secundata (Lyngbye) P.S.Dixon, 1976 accepted as Acrochaetium secundatum (Lyngbye) Nägeli, 1858 (basis of record)
Bangia fuscopurpurea (Dillwyn) Lyngbye, 1819 (basis of record)
Blidingia minima (Nägeli ex Kützing) Kylin, 1947 (additional source)
Bonnemaisonia hamifera Hariot, 1891 (additional source)
Bostrychia radicans (Montagne) Montagne, 1842 (basis of record)
Bryopsis hypnoides J.V.Lamouroux, 1809 (additional source)
Callithamnion corymbosum (Smith) Lyngbye, 1819 (additional source)
Ceramium diaphanum (Lightfoot) Roth, 1806 (additional source)
Chaetomorpha aerea (Dillwyn) Kützing, 1849 (additional source)
Chaetomorpha linum (O.F.Müller) Kützing, 1845 (additional source)
Champia parvula (C.Agardh) Harvey, 1853 (additional source)
Chorda filum (Linnaeus) Stackhouse, 1797 (additional source)
Chordaria flagelliformis (O.F.Müller) C.Agardh, 1817 (additional source)
Chroodactylon ornatum (C.Agardh) Basson, 1979 (additional source)
Cladophora dalmatica Kützing, 1843 (additional source)
Cladophora sericea (Hudson) Kützing, 1843 (additional source)
Cladophora vagabunda (Linnaeus) Hoek, 1963 (additional source)
Codium fragile (Suringar) Hariot, 1889 (additional source)
Corallina officinalis Linnaeus, 1758 (additional source)
Desmarestia viridis (O.F.Müller) J.V.Lamouroux, 1813 (additional source)
Dictyosiphon foeniculaceus (Hudson) Greville, 1830 (additional source)
Ectocarpus siliculosus (Dillwyn) Lyngbye, 1819 (additional source)
Enteromorpha clathrata (Roth) Greville, 1830 accepted as Ulva clathrata (Roth) C.Agardh, 1811 (additional source)
Enteromorpha flexuosa (Wulfen) J.Agardh, 1883 accepted as Ulva flexuosa Wulfen, 1803 (additional source)
Enteromorpha intestinalis (Linnaeus) Nees, 1820 accepted as Ulva intestinalis Linnaeus, 1753 (additional source)
Enteromorpha linza (Linnaeus) J.Agardh, 1883 accepted as Ulva linza Linnaeus, 1753 (additional source)
Enteromorpha prolifera (O.F.Müller) J.Agardh, 1883 accepted as Ulva prolifera O.F.Müller, 1778 (additional source)
Erythrocladia irregularis Rosenvinge, 1909 (additional source)
Erythrotrichia carnea (Dillwyn) J.Agardh, 1883 (additional source)
Eudesme virescens (Carmichael ex Berkeley) J.Agardh, 1882 (additional source)
Feldmannia irregularis (Kützing) Hamel, 1939 (additional source)
Gelidium pusillum (Stackhouse) Le Jolis, 1863 (additional source)
Gloiosiphonia capillaris (Hudson) Carmichael, 1833 (additional source)
Halothrix lumbricalis (Kützing) Reinke, 1888 (additional source)
Hildenbrandia rubra (Sommerfelt) Meneghini, 1841 (additional source)
Hincksia mitchelliae (Harvey) P.C.Silva, 1987 accepted as Feldmannia mitchelliae (Harvey) H.-S.Kim, 2010 (additional source)
Hincksia ovata (Kjellman) P.C.Silva, 1987 (additional source)
Hincksia sandriana (Zanardini) P.C.Silva, 1987 (additional source)
Hydrolithon farinosum (J.V.Lamouroux) Penrose & Y.M.Chamberlain, 1993 (additional source)
Kornmannia leptoderma (Kjellman) Bliding, 1969 (additional source)
Kuckuckia spinosa (Kützing) Kornmann, 1958 (additional source)
Laminariocolax tomentosoides (Farlow) Kylin, 1947 (additional source)
Leathesia difformis Areschoug, 1847 accepted as Leathesia marina (Lyngbye) Decaisne, 1842 (additional source)
Monostroma grevillei (Thuret) Wittrock, 1866 (additional source)
Petalonia fascia (O.F.Müller) Kuntze, 1898 (additional source)
Petalonia zosterifolia (Reinke) Kuntze, 1898 accepted as Planosiphon zosterifolius (Reinke) McDevit & G.W.Saunders, 2017 (additional source)
Phymatolithon lenormandii (J.E.Areschoug) W.H.Adey, 1966 (additional source)
Pilayella littoralis (Linnaeus) Kjellman, 1872 accepted as Pylaiella littoralis (Linnaeus) Kjellman, 1872 (additional source)
Pneophyllum fragile Kützing, 1843 (additional source)
Polysiphonia elongata (Hudson) Sprengel, 1827 accepted as Carradoriella elongata (Hudson) Savoie & G.W.Saunders, 2019 (additional source)
Polysiphonia fibrillosa (C.Agardh) Sprengel, 1827 accepted as Leptosiphonia fibrillosa (Agardh) Savoie & G.W.Saunders, 2019 (additional source)
Polysiphonia subtilissima Montagne, 1840 (additional source)
Porphyra yezoensis Ueda, 1932 accepted as Pyropia yezoensis (Ueda) M.S.Hwang & H.G.Choi, 2011 (basis of record)
Porphyropsis coccinea (J.Agardh ex Areschoug) Rosenvinge, 1909 (additional source)
Pringsheimiella scutata (Reinke) Marchewianka, 1925 accepted as Ulvella scutata (Reinke) R.Nielsen, C.J.O'Kelly & B.Wysor, 2013 (additional source)
Punctaria latifolia Greville, 1830 (additional source)
Punctaria plantaginea (Roth) Greville, 1830 (additional source)
Ralfsia verrucosa (Areschoug) Areschoug, 1845 (additional source)
Rhizoclonium riparium (Roth) Harvey, 1849 (additional source)
Scytosiphon lomentaria (Lyngbye) Link, 1833 (additional source)
Sphacelaria fusca (Hudson) S.F.Gray, 1821 (additional source)
Sphacelaria rigidula Kützing, 1843 (additional source)
Sphaerotrichia divaricata (C.Agardh) Kylin, 1940 (additional source)
Spongomorpha arcta (Dillwyn) Kützing, 1849 accepted as Acrosiphonia arcta (Dillwyn) Gain, 1912 (additional source)
Spongonema tomentosum (Hudson) Kützing, 1849 (additional source)
Spyridia filamentosa (Wulfen) Harvey, 1833 (additional source)
Streblonema chordariae (Wollny) A.D.Cotton ex Lily Newton, 1931 accepted as Chordaria flagelliformis (O.F.Müller) C.Agardh, 1817 (basis of record)
Streblonema fasciculatum Thuret, 1863 (additional source)
Stylonema alsidii (Zanardini) K.M.Drew, 1956 (additional source)
Ulothrix flacca (Dillwyn) Thuret, 1863 (additional source)
Ulva lactuca Linnaeus, 1753 (additional source)