| Gastroclonium Kütz., 1843 |
| Gastroclonium clavatum (Roth) Ardiss., 1883 |
| Gastroclonium compressum (Hollenberg) C.F. Chang & B.M. Xia, 1978 |
| Gastroclonium coulteri (Harv.) Kylin, 1931 |
| Gastroclonium pacificum (E.Y. Dawson) C.F. Chang & B.M. Xia, 1978 |
| Gastroclonium parvum (Hollenberg) C.F. Chang & B.M. Xia, 1978 |
| Gastroclonium subarticulatum (Turner) Kütz., 1843 |
| Neogastroclonium Le Gall, Dalen & G.W. Saunders, 2008 |
| Neogastroclonium subarticulatum (Turner) Le Gall, Dalen & G.W. Saunders, 2008 |
| Sedoidea Stackh., 1809 |