| Asperococcus J.V. Lamour., 1813 |
| Asperococcus bullosus J.V. Lamour., 1813 |
| Asperococcus echinatus (Mert. ex Roth) C. Agardh, 1817 |
| Asperococcus fistulosus (Huds.) W.J. Hooker, 1833 |
| Asperococcus intricatus J. Agardh, 1847 |
| Asperococcus sinuosus (Mert. ex Roth) Bory, 1832 |
| Chordariaceae Grev., 1830 |
| Cladosiphon Kütz., 1843 |
| Cladosiphon floridanus W.R. Taylor, 1928 |
| Cladosiphon occidentalis Kylin, 1940 |
| Cladosiphon zosterae (J. Agardh) Kylin, 1940 |
| Coilodesme Strömf., 1886 |
| Coilodesme californica (Rupr.) Kjellm., 1889 |
| Coilodesme corrugata Setchell & N.L. Gardner, 1924 |
| Coilodesme rigida Setch. & N.L. Gardner, 1924 |
| Cylindrocarpus P. Crouan & H. Crouan, 1851 |
| Cylindrocarpus rugosus Okamura, 1903 |
| Encoelium C. Agardh, 1820 |
| Encoelium clathratum C. Agardh, 1823 |
| Eudesme J. Agardh, 1882 |