Authors: Zmitrovich, Ivan V & Ezhov, Oleg N & Ershov, Roman V.
Journal: Karstenia, Volume 50 (2010), Issue 2, pages 53-58.
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Key words: European Russia, Polyporus, salicicolous, morphometry, taxonomy
Abstract: New records of Polyporus pseudobetulinus on willow species from Arkhangelsk Region (North of European Russia) were made. The differences between P. pseudobetulinus and the similar P. choseniae are generalized, highlighting spore variability and hyphal system. The two species are rather distant from each other. P. pseudobetulinus is characterized by dimitic hyphal system with a predominance of fibre hyphae, lack of clamps, and somewhat sigmoid spores, whereas P. choseniae has dimitic hyphal system with a predominance of skeleto-binding hyphae, clamps, and symmetrically fusoid basidiospores. The ecological preferences and distribution patterns of both species are discussed.