| Agardhiella F. Schmitz, 1896 |
| Agardhiella mexicana E.Y. Dawson, 1944 |
| Agardhiella ramosissima (Harv.) Kylin, 1932 |
| Agardhiella subulata (C. Agardh) Kraft & Wynne, 1979 |
| Agardhiella tenera (J. Agardh) F. Schmitz, 1897 |
| Eucheuma J. Agardh, 1847 |
| Eucheuma acanthocladum (Harv.) J. Agardh, 1876 |
| Eucheuma denticulatum (Burman) Collins & Herv., 1917 |
| Eucheuma echinocarpum Aresch., 1854 |
| Eucheuma gelidium (J. Agardh) J. Agardh, 1847 |
| Eucheuma inerme F. Schmitz, 1895 |
| Eucheuma isiforme (C. Agardh) J. Agardh, 1847 |
| Eucheuma isiforme var. denudatum Cheney, 1988 |
| Eucheuma johnstonii Setch. & N.L. Gardner, 1924 |
| Eucheuma schrammii (P. Crouan & H. Crouan) J. Agardh, 1892 |
| Eucheuma uncinatum Setch. & N.L. Gardner, 1924 |
| Eucheumatopsis M.L. Núñez-Resendiz, Dreckmann & Sentíes, 2019 |
| Eucheumatopsis isiformis (C. Agardh) Núñez-Resendiz, Dreckmann & Sentíes, 2019 |
| Flahaultia Bornet, 1892 |
| Flahaultia tegetiformans W.R. Taylor, 1974 |