| Ceramium serpens Setch. & N.L. Gardner, 1924 |
| Ceramium sertularioides Gratel., 1806 |
| Ceramium siliquosum (Kütz.) Maggs & Hommers., 1993 |
| Ceramium siliquosum var. lophophorum (Feldm. -Maz.) Serio, 1994 |
| Ceramium siliquosum var. zostericola (Feldmann-Mazoyer) G. Furnari, 1999 |
| Ceramium sinicola Setch. & N.L. Gardner, 1924 |
| Ceramium sinicola var. interruptum (Setch. & N.L. Gardner) E.Y. Dawson, 1944 |
| Ceramium sinicola var. johnstonii (Setch. & N.L. Gardner) E.Y. Dawson, 1944 |
| Ceramium strictum (Kütz.) Rabenh., 1847 |
| Ceramium strictum Grev. & Harv., 1846 |
| Ceramium subtile J. Agardh, 1851 |
| Ceramium taylorii E.Y. Dawson, 1950 |
| Ceramium templetonii Setch. & N.L. Gardner, 1937 |
| Ceramium tenerrimum (G. Martens) Okamura, 1921 |
| Ceramium tenuicorne (Kütz.) Waern, 1952 |
| Ceramium tenuissimum (Roth) Aresch., 1847 |
| Ceramium tenuissimum Bonnemaison, 1828 |
| Ceramium transversale F.S. Collins & Herv., 1917 |
| Ceramium uruguayense W.R. Taylor, 1960 |
| Ceramium vagabundum E.Y. Dawson, 1957 |