Ptilonia
| Ptilonia | |
|---|---|
| Ptilonia willana (ASM AK295881) | |
| Scientific classification | |
| Clade: | Archaeplastida | 
| Division: | Rhodophyta | 
| Class: | Florideophyceae | 
| Order: | Bonnemaisoniales | 
| Family: | Bonnemaisoniaceae | 
| Genus: | Ptilonia (Harvey) J. Agardh, 1863  | 
| Type species | |
| Ptilonia magellanica (Montagne) J.Agardh  | |
| Species | |
| 
 See text  | |
Ptilonia (Harvey) J. Agardh, 1863 is a genus of red algae in the family Bonnemaisoniaceae.