Ann. Bot. Fennici 38: 201–209 ISSN 0003-455X Helsinki 7 September 2001 © Finnish Zoological and Botanical Publishing Board 2001 Spongipellis sibirica, comb. nova (Basidiomycetes), and its affinities to the polypore genera Tyromyces, Aurantioporus and Climacocystis Heikki Kotiranta1 & Tatyana Penzina2 1) Finnish Environment Institute, Nature and Land Use Division, P.O. Box 140, FIN-00251 Helsinki, Finland (e-mail: heikki.kotiranta@vyh.fi) 2) Siberian Institute of Plant Physiology and Biochemistry, Siberian Branch of the Russian Academy of Sciences, P.O. Box 1243, Irkutsk 664033, Russia (e-mail:
[email protected]) Received 15 January 2001, accepted 5 June 2001 Kotiranta, H. & Penzina, T. 2001: Spongipellis sibirica, comb. nova (Basidiomycetes), and its affinities to the polypore genera Tyromyces, Aurantioporus and Climacocystis. — Ann. Bot. Fennici 38: 201–209. The species was recently described as Tyromyces sibiricus Penzina & Ryvarden. The new combination Spongipellis sibirica (Penzina & Ryvarden) Penzina & Kotir. is proposed, based on microscopic characteristics, e.g., thick-walled, cyanophilous spores and the structure of the contextual hyphae. The microscopical details are described and illustrated, and comparisons made with the similar-looking species Aurantioporus fissilis (Berk. & M. A. Curtis) H. Jahn, Climacocystis borealis (Fr.) Kotl. & Pouzar and Spongipellis spumea (Sowerby: Fr.) Pat. The affinities to the genus Tyromyces P. Karsten are briefly discussed; S. sibirica lacks the special, spiny encrustations, characteristic of the species of Tyromyces. The species was earlier known from the type locality only. In this paper it is reported from Siberia, Buryat Rep., Lake Baykal, Russian Far East, Kamchatka and China. Key words: Aurantioporus, China, Climacocystis, Siberia, Spongipellis, taxonomy, Tyromyces 202 Kotiranta & Penzina • ANN.