LICHALP

Gyalecta derivata (Nyl.) H. Olivier

Syn.: Gyalecta biformis (Körb.) H. Olivier, Gyalecta croatica Schuler & Zahlbr., Gyalecta truncigena (Ach.) Hepp var. biformis (Körb.) Vězda, Gyalecta truncigena (Ach.) Hepp var. croatica (Schuler & Zahlbr.) Vězda, Gyalecta truncigena (Ach.) Hepp var. derivata (Nyl.) Boistel, Lecidea derivata Nyl.

Lichenised.

Substrate: bark

Altitudinal range: from the submediterranean/colline belt (potential vegetation: mixed deciduous forests dominated by Quercus and Carpinus) to the montane belt (potential vegetation: deciduous forests dominated by Fagus sylvatica and closed coniferous forests with Picea abies)

Note: a species of the G. truncigena-group found on broad-leaved trees (especially Acer and Fraxinus) in humid areas, with elongate-fusiform ascospores which occasionally have 1-2 straight longitudinal septa, widespread in Europe and also known from North Africa, but rather rare; in the Alps known from several scattered localities, but not always distinguished from G. truncigena.