| Blossevillea Decne., 1840 |
| Blossevillea brandegeei Setch. & N.L. Gardner, 1913 |
| Carpacanthus Kütz., 1843 |
| Carpacanthus liebmannii (J. Agardh) Kütz., 1849 |
| Cystophylum J. Agardh, 1848 |
| Cystoseira C. Agardh, 1820 |
| Cystoseira myrica (S.G. Gmel.) C. Agardh, 1820 |
| Cystoseira neglecta Setch. & N.L. Gardner, 1917 |
| Cystoseira osmundacea (Menzies & Turner) C. Agardh, 1820 |
| Cystoseira setchellii N.L. Gardner, 1913 |
| Halidrys Lyngb., 1819 |
| Halidrys dioica N.L. Gardner, 1913 |
| Polycladia Mont., 1847 |
| Polycladia myrica (S.G. Gmel.) Draisma, Ballesteros, F. Rousseau & T. Thibaut, 2010 |
| Sargassaceae Kütz., 1843 |
| Sargassum C. Agardh, 1820 |
| Sargassum acinacifolium Setch. & N.L. Gardner, 1924 |
| Sargassum acinarium (L.) Setch., 1933 |
| Sargassum affine J. Agardh, 1848 |
| Sargassum agardhianum Farlow ex J. Agardh, 1876 |