| Echinocaulon Kütz., 1843 |
| Echinocaulon pannosum Feldmann, 1931 |
| Gelidiella Feldmann & Hamel, 1934 |
| Gelidiella acerosa (Forssk.) Feldmann & G. Hamel, 1934 |
| Gelidiella antipai Celan, 1938 |
| Gelidiella hancockii E.Y. Dawson, 1944 |
| Gelidiella ligulata E.Y. Dawson, 1953 |
| Gelidiella lubrica (Kütz.) Feldmann & Hamel, 1934 |
| Gelidiella mexicana E.Y. Dawson, 1944 |
| Gelidiella pannosa (Feldmann) Feldmann & G. Hamel, 1934 |
| Gelidiella refugiensis E.Y. Dawson, 1944 |
| Gelidiella sanctarum Feldmann & Hamel, 1934 |
| Gelidiella setacea (Feldmann) Feldmann & G. Hamel, 1934 |
| Gelidiella stichidiospora E.Y. Dawson, 1953 |
| Gelidiella taylorii A.B. Joly, 1957 |
| Gelidiella tenuissima Feldmann & Hamel, 1936 |
| Gelidiella trinitatensis W.R. Taylor, 1943 |
| Gelidiellaceae Fan, 1961 |
| Millerella G.H. Boo & S.M. Boo, 2016 |
| Millerella pannosa (Feldmann) G.H. Boo & L. LeGall, 2016 |