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Description:

Figure 1.Photographs of new species or records for the Nordic countries, Norway, and Sweden. Macroscopic habit of Tremella rhizocarpicola on Rhizocarpon lavatum (holotype, BG: L-68612) (A), Tremella pertusariae on Pertusaria hymenea (S: F-131626) (B), Tremella protoparmeliae, asymptomatic on Protoparmelia badia (S: F-255342) (C), Tremella caloplacae on Caloplaca decipiens (S: F-253110) (D), Tremella caloplacae on Xanthoria parietina (S: F-253109) (E), and Tremella rinodinae on Rinodina gennarii (S: F-255341) (F). Basidium morphology in Tremella rhizocarpicola (G), Tremella pertusariae (H), Tremella protoparmeliae (I), Tremella caloplacae (S: F-255314) (J), and Tremella rinodinae (K–L). Scale bars: 1 mm (A–F) and 10 mm (G–L).