| Petrosiphon M. Howe, 1905 |
| Petrosiphon adhaerens M. Howe, 1905 |
| Valonia C. Agardh, 1823 |
| Valonia aegagropila C. Agardh, 1823 |
| Valonia favulosa C. Agardh, 1823 |
| Valonia macrophysa Kütz., 1843 |
| Valonia ocellata M. Howe, 1920 |
| Valonia pachynema (G. Martens) Weber van Bosse, 1913 |
| Valonia utricularis (Roth) C. Agardh, 1823 |
| Valonia ventricosa J. Agardh, 1887 |
| Valonia verticillata Kütz., 1847 |
| Valoniaceae Kütz., 1849 |
| Valoniopsis Børgesen, 1934 |
| Valoniopsis hancockii E.Y. Dawson, 1944 |
| Valoniopsis pachynema (G. Martens) Børgesen, 1934 |
| Ventricaria Olsen & J. West, 1988 |
| Ventricaria ventricosa (J. Agardh) Olsen & J. West, 1988 |