Arthonia phaeobaea grows in the supralittoral zone on rich or slightly calcareous coastal rocks along the Norwegian coastline. It is easily identified by pale brown to brown thalli with a faint mauve hue, and by the numerous brownish black pycnidia. The photobiont is chlorococcoid. The brown-black apothecia are often lacking. The colorless spores are 3–5-septate and lack an enlarged apical cell.
Arthonia phaeobaea
(Norman) Norman
|
Andreas Frisch
|
NTNU Vitenskapsmuseet
|
Håkon Holien
|
NORD Universitet
