| Gardneriella Kylin, 1941 |
| Gardneriella tuberifera Kylin, 1941 |
| Kappaphycus Doty, 1988 |
| Kappaphycus alvarezii (Doty) Doty ex P.C. Silva, 1996 |
| Kappaphycus inermis (F. Schmitz) Doty & P.C. Silva, 1996 |
| Meristotheca J. Agardh, 1872 |
| Meristotheca cylindrica Núñez-Resendiz, Dreckmann & Sentíes, 2017 |
| Meristotheca echinocarpa (Aresch.) Faye & Masuda, 2004 |
| Meristotheca gelidium (J. Agardh) E.J. Faye & M. Masuda, 2004 |
| Meristotheca schramii (P.L. Crouan & H.M. Crouan) J.H. Price, D.M. John & G.W. Lawson, 1986 |
| Meristotheca spinella Núñez-Resendiz, Dreckmann & Sentíes, 2019 |
| Neoagardhiella M.J. Wynne & W.R. Taylor, 1973 |
| Neoagardhiella baileyi (Kütz.) M.J. Wynne & W.R. Taylor, 1973 |
| Neoagardhiella ramosissima (Harv.) M.J. Wynne & W.R. Taylor, 1973 |
| Sarcodiotheca Kylin, 1932 |
| Sarcodiotheca dichotoma (M. Howe) E.Y. Dawson, 1944 |
| Sarcodiotheca divaricata W.R. Taylor, 1945 |
| Sarcodiotheca ecuadoreana W.R. Taylor, 1945 |
| Sarcodiotheca elongata (Setch. & N.L. Gardner) Setch., 1944 |
| Sarcodiotheca furcata (Setch. & N.L. Gardner) Kylin, 1932 |