Acanthophora J.V.Lamouroux, 1813 (basis of record)
Acrochaetiaceae Melchior, 1954 (basis of record)
Acrochaetiales (basis of record)
Acrochaetium Nägeli, 1858 (basis of record)
Acrochaetium robustum Børgesen, 1915 accepted as Colaconema robustum (Børgesen) Huisman & Woelkerling, 2018 (basis of record)
Acrosorium Zanardini ex Kützing, 1869 (basis of record)
Ahnfeltiopsis P.C.Silva & DeCew, 1992 (basis of record)
Amphiroa J.V.Lamouroux, 1812 (basis of record)
Anadyomenaceae Kützing, 1843 (basis of record)
Asparagopsis Montagne, 1840 (basis of record)
Asparagopsis taxiformis (Delile) Trevisan de Saint-Léon, 1845 (additional source)
Asteronema Delépine & Asensi, 1975 (basis of record)
Bangia Lyngbye, 1819 (basis of record)
Bangia atropurpurea (Mertens ex Roth) C.Agardh, 1824 (basis of record)
Bangiaceae Duby, 1830 (basis of record)
Bonnemaisoniaceae Schmitz, 1892 (basis of record)
Bonnemaisoniales (additional source)
Boodlea G.Murray & De Toni, 1889 (basis of record)
Boodleaceae Børgesen, 1925 (basis of record)
Bostrychia Montagne, 1842 (basis of record)
Bryopsidaceae Bory de Saint-Vincent, 1829 (basis of record)
Bryopsis J.V.Lamouroux, 1809 (basis of record)
Bryopsis muscosa 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)
Catenella Greville, 1830 (basis of record)
Caulacanthaceae Kützing, 1843 (basis of record)
Caulacanthus Kützing, 1843 (basis of record)
Caulacanthus ustulatus (Turner) Kützing, 1843 (additional source)
Caulerpa J.V.Lamouroux, 1809 (basis of record)
Caulerpa cupressoides (Vahl) C.Agardh, 1817 (basis of record)
Caulerpa peltata J.V.Lamouroux, 1809 accepted as Caulerpa chemnitzia (Esper) J.V.Lamouroux, 1809 (basis of record)
Caulerpa racemosa (Forsskål) J.Agardh, 1873 (additional source)
Caulerpa scalpelliformis (R.Brown ex Turner) C.Agardh, 1817 (additional source)
Caulerpa sertularioides (S.G.Gmelin) M.Howe, 1905 (basis of record)
Caulerpa taxifolia (M.Vahl) C.Agardh, 1817 (additional source)
Caulerpaceae Kützing, 1843 (basis of record)
Centroceras Kützing, 1842 '1841' (basis of record)
Centroceras clavulatum (C.Agardh) Montagne, 1846 (basis of record)
Ceramiaceae Dumortier, 1822 (basis of record)
Ceramiales (basis of record)
Ceramium Roth, 1797 (basis of record)
Ceramium tenerrimum (G.Martens) Okamura, 1921 accepted as Pseudoceramium tenerrimum (G.Martens) Barros-Barreto & Maggs, 2023 (basis of record)
Chaetomorpha Kützing, 1845 (basis of record)
Chaetomorpha antennina (Bory) Kützing, 1847 (basis of record)
Champia Desvaux, 1809 (basis of record)
Champia parvula (C.Agardh) Harvey, 1853 (basis of record)
Champiaceae Kützing, 1843 (basis of record)
Chondracanthus Kützing, 1843 (basis of record)
Chondrophycus (J.Tokida & Y.Saito) Garbary & J.T.Harper, 1998 (basis of record)
Chordariaceae Greville, 1830 (basis of record)
Cladophora Kützing, 1843 (basis of record)
Cladophora albida (Nees) Kutzing, 1843 (basis of record)
Cladophora sericea (Hudson) Kützing, 1843 (basis of record)
Cladophora vagabunda (Linnaeus) Hoek, 1963 (basis of record)
Cladophoraceae Wille, 1884 (basis of record)
Codiaceae Kützing, 1843 (additional source)
Codium Stackhouse, 1797 (basis of record)
Colpomenia (Endlicher) Derbès & Solier, 1851 (basis of record)
Colpomenia sinuosa (Mertens ex Roth) Derbès & Solier, 1851 (basis of record)
Corallina Linnaeus, 1758 (additional source)
Corallina officinalis Linnaeus, 1758 (basis of record)
Corallinaceae Lamouroux, 1812 (basis of record)
Cystocloniaceae Kützing, 1843 (basis of record)
Dasycladaceae Kützing, 1843 (basis of record)
Delesseriaceae Bory, 1828 (basis of record)
Dermonema Harvey ex Heydrich, 1894 (basis of record)
Dermonema virens (J.Agardh) Pedroche & Ávila Ortíz, 1996 (basis of record)
Dictyopteris J.V.Lamouroux, 1809 (basis of record)
Dictyopteris divaricata (Okamura) Okamura, 1932 (basis of record)
Dictyosphaeria Decaisne, 1842 (basis of record)
Dictyota J.V.Lamouroux, 1809 (basis of record)
Dictyota dichotoma (Hudson) J.V.Lamouroux, 1809 (basis of record)
Dictyotaceae Lamouroux ex Dumortier, 1822 (basis of record)
Ectocarpaceae C. Agardh, 1828 (basis of record)
Ectocarpus Lyngbye, 1819 (basis of record)
Ectocarpus siliculosus (Dillwyn) Lyngbye, 1819 (additional source)
Elachista Duby, 1830 (basis of record)
Elachista fucicola (Velley) Areschoug, 1842 (basis of record)
Feldmannia G.Hamel, 1939 (basis of record)
Galaxaura J.V.Lamouroux, 1812 (basis of record)
Galaxaura rugosa (J.Ellis & Solander) J.V.Lamouroux, 1816 (basis of record)
Galaxauraceae P.G. Parkinson, 1983 (basis of record)
Gelidiaceae Kützing, 1843 (basis of record)
Gelidiales (basis of record)
Gelidium J.V. Lamouroux, 1813 (basis of record)
Gelidium crinale (Hare ex Turner) Gaillon, 1828 (basis of record)
Gelidium divaricatum G.Martens, 1866 accepted as Gelidiophycus divaricatus (G.Martens) G.H.Boo, J.K.Park & S.M.Boo, 2013 (basis of record)
Gelidium pusillum (Stackhouse) Le Jolis, 1863 (basis of record)
Gigartinaceae Bory, 1828 (basis of record)
Gigartinales (basis of record)
Gloiosiphonia Carmichael, 1833 (basis of record)
Gloiosiphoniaceae F.Schmitz, 1892 (basis of record)
Gracilaria Greville, 1830 (basis of record)
Gracilaria bursa-pastoris (S.G.Gmelin) P.C.Silva, 1952 (basis of record)
Gracilariaceae Nägeli, 1847 (basis of record)
Grateloupia C.Agardh, 1822 (basis of record)
Grateloupia filicina (J.V.Lamouroux) C.Agardh, 1822 (basis of record)
Halophila Du Petit-Thouars, 1806 (basis of record)