| Bryothamnion seaforthii (Turner) Kütz., 1843 |
| Bryothamnion seaforthii f. imbricatum J. Agardh, 1863 |
| Bryothamnion triangulare Kütz., 1849 |
| Bryothamnion triquetrum (S.G. Gmel.) M. Howe, 1915 |
| Carradoriella P.C. Silva, 1996 |
| Carradoriella denudata (Dillwyn) A.M. Savoie & G.W. Saunders, 2018 |
| Chondria C. Agardh, 1817 |
| Chondria acrorhizophora Setch. & N.L. Gardner, 1924 |
| Chondria arcuata Hollenberg, 1945 |
| Chondria atropurpurea Harv., 1853 |
| Chondria baileyana (Mont.) Harv., 1853 |
| Chondria californica (Collins) Kylin, 1941 |
| Chondria capillaris (Huds.) Wynne, 1991 |
| Chondria clarionensis Setch. & N.L. Gardner, 1930 |
| Chondria cnicophylla (Melvill & Murray) De Toni, 1903 |
| Chondria collinsiana M. Howe, 1920 |
| Chondria curvilineata Collins & Herv., 1917 |
| Chondria dasyphylla (Woodward) C. Agardh, 1817 |
| Chondria decipiens Kylin, 1941 |
| Chondria floridana (Collins) M. Howe, 1928 |