| Species name | Common name | Distribution | Max. Length (cm) |
|---|---|---|---|
| Alsidium corallinum C. Agardh |
Coral corsican moss | Mediterranean Sea | 10 |
| Alsidium helminthochorton (Schwendimann) Kützing, 1843 |
Corsican moss | Mediterranean Sea | 5 |
| Alsidium pusillum E.Y. Dawson |
Pacific Ocean |