Authors: Vlasenko, Anastasia & Filippova, Nina & Vlasenko, Vyacheslav
Journal: Karstenia, Volume 58 (2020), Issue 2, pages 393-400.
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Key words: molecular data, morphology, myxomycetes, new records, SEM, SSU rDNA gene sequences, Stemonitidales, taxonomy
Abstract: A new species Symphytocarpus macrosporus is described based on collections made in the Khanty-Mansi Autonomous Area – Yugra, Russia. Thirty- two specimens of the new species were isolated from moist chambers with Picea obovata and Abies siberica bark. The new species is characterized by the presence of pseudoaethalia, without cortex, with peridium remaining as fragments. This new species clearly differs from previously described species of the genus by both morphological and molecular characters. It has large spores, (14)15–17(18) μm diam. with irregular ornamentation of large warts. Such a spore size seems to be the largest for the genus. The holotype specimen of Symphytocarpus macrosporus is stored in the M.G. Popov Herbarium (NSK), Novosibirsk, Russia. It is the first new species described within the genus Symphytocarpus since 1984.