| Rosenvingea sanctae-crucis Børgesen, 1914 |
| Scytosiphon C. Agardh, 1820 |
| Scytosiphon canaliculatus (Setch. & N.L. Gardner) Kogame, 1996 |
| Scytosiphon dotyi Wynne, 1969 |
| Scytosiphon gracilis Kogame, 1998 |
| Scytosiphon lomentaria (Lyngb.) Link, 1833 |
| Scytosiphon lomentaria var. complanatus (Rosenv.) Cremades, 1893 |
| Scytosiphonaceae Farlow, 1881 |
| Stragularia Strömf., 1886 |
| Stragularia clavata (Harv.) G. Hamel, 1939 |