| Petrosiphon | |
|---|---|
 | |
| Petrosiphon adhaerens | |
Scientific classification  | |
| Domain: | Eukaryota |
| Supergroup: | Archaeplastida |
| Clade: | Viridiplantae |
| Division: | Chlorophyta |
| Class: | Ulvophyceae |
| Order: | Cladophorales |
| Family: | Valoniaceae |
| Genus: | Petrosiphon M.A.Howe |
| Type species | |
| Petrosiphon adhaerens | |
Petrosiphon is a genus of green algae in the family Valoniaceae. It can be found in tropical and subtropical coastal waters.
