| Sargassum sinicola Setch. & N.L. Gardner, 1924 |
| Sargassum sinicola subsp. camouii (E.Y. Dawson) J.N. Norris & Yensen, 2010 |
| Sargassum sinicola var. camouii (E.Y. Dawson) J.N. Norris & N.P. Jensen., 1984 |
| Sargassum sinicola var. sinicola Setch. & N.L. Gardner, 1924 |
| Sargassum sonorense E.Y. Dawson, 1960 |
| Sargassum templetonii Setch., 1937 |
| Sargassum ulixei G. Andrade-Sorcia & S.M. Boo, 2014 |
| Sargassum vizcainense E.Y. Dawson, 1954 |
| Sargassum vulgare C. Agardh, 1820 |
| Sargassum vulgare f. brevipes (Kütz.) Grun, 1916 |
| Sargassum vulgare f. ovata Collins, 1901 |
| Sargassum vulgare var. foliosissimum (J.V. Lamour.) C. Agardh, 1821 |
| Sargassum vulgare var. furcatum (Kütz.) Kuntze, 1880 |
| Sargassum xochitlae González-Nieto, Oliveira & Mateo-Cid, 2020 |
| Sargassum zacae Setch., 1937 |
| Stephanocystis Trevis., 1843 |
| Stephanocystis dioica (N.L. Gardner) Draisma, Ballesteros, F. Rousseau & T. Thibaut, 2010 |
| Stephanocystis neglecta (Setch. & N.L. Gardner) Draisma, Ballesteros, F. Rousseau & T. Thibaut, 2010 |
| Stephanocystis osmundacea (Turner) Trevis., 1843 |
| Stephanocystis setchellii (N.L. Gardner) Draisma, Ballesteros, F. Rousseau & T. Thibaut, 2010 |