New resinicolous ascomycetes from beaver scars in western North America

摘要

Three new species of resinicolous ascomycetes are described from western North America. These include two species of Chaenothecopsis (Mycocaliciaceae) and the new monotypic genus Brucea, with the new species B. castoris. Deep scars and massive resin flows caused by beaver represent an important habitat type for resinicolous fungi in the Pacific Northwest. All the new fungi grow on scarred Abies grandis and Tsuga heterophylla in low elevation forests in Oregon. Chaenothecopsis montana and C. oregana are also common at higher elevations in the Cascade Range. The former species also occurs in northern Europe, where it grows on Picea abies resin in moist conifer forests.