| Ahnfeltiopsis P.C. Silva & DeCew, 1992 |
| Ahnfeltiopsis concinna (J. Agardh) P.C. Silva & DeCew, 1992 |
| Ahnfeltiopsis divaricata (Holmes) Masuda, 1993 |
| Ahnfeltiopsis gigartinoides (J. Agardh) P.C. Silva & DeCew, 1992 |
| Ahnfeltiopsis hancockii (E.Y. Dawson) J.N. Norris & Fredericq, 2014 |
| Ahnfeltiopsis leptophylla (J. Agardh) P.C. Silva & DeCew, 1992 |
| Ahnfeltiopsis linearis (C. Agardh) P.C. Silva & DeCew, 1992 |
| Ahnfeltiopsis serenei (E.Y. Dawson) Masuda, 1993 |
| Ahnfeltiopsis smithii (W. R. Taylor) Dreckmann & I. Stout, 1993 |
| Besa Setch., 1912 |
| Besa divaricata (Holmes) M.S.Calderon & S.M. Boo, 2016 |
| Besa leptophylla (J. Agardh) M.S. Calderon & K.A. Miller, 2016 |
| Fredericqia Maggs, L. Le Gall, F. Mineur, J. Provan & G.W. Saunders, 2013 |
| Fredericqia chiton (M. Howe) Maggs, L.Le Gall, Mineur, Provan & G. W. Saunders, 2013 |
| Fredericqia decewii Maggs, L.Le Gall, Mineur, Provan & G.W. Saunders, 2013 |
| Gymnogongrus H. Mart., 1833 |
| Gymnogongrus carnosus Setch. &Gardner, 1924 |
| Gymnogongrus crenulatus (Turner) J. Agardh, 1851 |
| Gymnogongrus crustiformis E.Y. Dawson, 1961 |
| Gymnogongrus divaricatus Holmes, 1896 |