Micarea tomentosa (Pilocarpaceae, lichenized Ascomycota) new to Russia from the Republic of Mordovia
Abstract
Micarea tomentosa is reported as new to Russia from one locality in the Republic of Mordovia, where it grows on decaying wood of Alnus glutinosa in humid habitat of the old alder forest in the floodplain of the Vyaz-Pushta stream in Mordovskiy Reserve. M. tomentosa is similar to M. hedlundii stalked, whitish and tomentose pycnidia, but has a more brightly colored and more continuous thallus which is composed of granules larger than the goniocysts of M. hedlundii; anatomically, the two species can be differentiated by the presence of the dull orange pigment (reacting K+ violet, C+ violet) within the goniocysts of M. hedlundii; the apothecia of M. tomentosa are pale to slightly brownish, pinkish-brown usually simple and adnate while the apothecia of M. hedlundii are often tuberculate, larger and darker, pinkish-brown or brown pigmented. In addition, M. tomentosa has short (meso)condia. The species was known earlier only from four European countries (Poland, Slovakia, Estonia and Sweden), where it occurrs mostly within large complexes of natural forest ecosystems, especially in protected nature reserves, demonstrating its particular role as an indicator of ecological continuity for forest habitats. Considering the earlier known distribution of M. tomentosa, the Mordovian finding extends its known geographic range far to the East and confirms its occurrence in the Eastern Europe.Downloads
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References
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