LICHALP

Arthonia faginea Müll. Arg.

Syn.: Allarthonia faginea (Müll. Arg.) Redinger

Lichenised.

Substrate: bark

Altitudinal distribution: montane belt (potential vegetation: deciduous forests dominated by Fagus sylvatica and closed coniferous forests with Picea abies)

Note: the ascospores which are 2-septate when fully developed are diagnostic, recalling somewhat A. radiata, but with a coccoid photobiont; on smooth bark under suboceanic conditions; distribution insufficiently known.