| Genus: |
Petrospongium Nägeli ex Kützing |
|
Authority: |
(Greville) Nägeli ex Kützing |
|
Description: |
Thalli forming circular discs rich dark-brown, flattish, solid, firm, carnose, about an inch across, radially corrugated, closely adhering to, and difficult to remove from, the substratum, slimy and inward-curling when removed; common; mostly summer. |
| Biogeography |
NE Atlantic; Adriatic Sea; Atlantic Is (Azores, Canary Is). |
| References |
Cormaci, M., Furnari, G., Catra, M., Alongi, G. & Giaccone, G. (2012). Flora marina bentonica del Mediterraneo: Phaeophyceae. Bollettino dell'Accademia Gioenia 45: 1-508. |
| Type information: |
Type locality: Torquay, on marble rocks, summer 1825 (Berkeley) |
