| Gelidiaceae Kütz., 1843 |
| Gelidium J.V. Lamour., 1813 |
| Gelidium americanum (W.R. Taylor) Santel., 1976 |
| Gelidium arborescens N.L. Gardner, 1927 |
| Gelidium californicum J. Agardh, 1993 |
| Gelidium capense (S.G.Gmelin) P.C. Silva, 1987 |
| Gelidium cartilagineum (L.) Gaillon, 1828 |
| Gelidium cartilagineum var. robustum N.L. Gardner, 1927 |
| Gelidium chilense (Montagne) Santelices & Montalva, 1983 |
| Gelidium corneum (Huds.) J.V. Lamour., 1813 |
| Gelidium coronadense E.Y. Dawson, 1953 |
| Gelidium coulteri Harv., 1853 |
| Gelidium crinale (Hare ex Turner) Gaillon, 1828 |
| Gelidium deciduum E.Y. Dawson, 1953 |
| Gelidium decompositum Setch. & N.L. Gardner, 1924 |
| Gelidium densum N.L. Gardner, 1927 |
| Gelidium filicinum Bory de Saint-Vincent, 1828 |
| Gelidium flaccidum P.J.L.Dangeard, 1951 |
| Gelidium floridanum W.R. Taylor, 1943 |
| Gelidium galapagense W.R. Taylor, 1945 |