LICHALP

Peridiothelia grandiuscula (Anzi) D. Hawksw.

Syn.: Didymosphaeria grandiuscula (Anzi) Sacc., Microthelia grandiuscula Anzi, Microthelia micula Körb. var. megaspora (Nyl.) B. de Lesd.

Non- or doubtfully lichenised.

Substrate: bark

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

Note: a probably non-lichenised species resembling P. fuliguncta, but ascospores distinctly larger (25-33 × 10-12 µm); less restricting in phorophyte selection than P. fuliguncta; on bark of various deciduous trees, rarely ascomata breaking through the thalli of epiphytic Lecanora s.lat. and Pertusaria s.lat. and then virtually lichenicolous; widespread in Eurasia, with a few scattered records from the Alps.