Graddonia coracina
Graddonia coracina (Bres.) Dennis
Dermateaceae
Conservation status. Endangered [EN B2ab(i,ii,iv)].
Morphology and biology. Fruit-bodies (apothecia) single or crowded, sessile, discoid, smooth with slightly wavy margin, at first red brown, darkening with age or on drying; disc up to 2.5 mm in diameter, slightly convex. Spores elliptic-fusiform, 12.5–20(22.5) × 7.5–11 µm, at first unicellular, later 1-septate, packed with numerous small oil drops, hyaline. II–X.
Habitats and populations. In damp places on rotten, fallen on the ground coniferous and deciduous twigs.
Distribution in Bulgaria. Vitosha Region (Vitosha Mt – above Salzitsa chalet and above Simeonovo).
General distribution. Europe.
Threats. Habitat changes as result of agricultural activities, wood extraction, tourism development, limited distribution of the species.
Conservation measures taken. Included in the Red List of Fungi in Bulgaria.
Conservation measures needed. Research into the species biology and ecology; inclusion in the National biodiversity monitoring system.
References. Dimitrova 2002a; Gyosheva et al. 2006.
Author: Evtimiya Dimitrova
