Abstract
Two new species, Hyphoderma fissuratum and H. mopanshanense spp. nov., are proposed based on morphological and molecular evidences. Hyphoderma fissuratum is characterized by resupinate basidiomata with cracking hymenial surface, a monomitic hyphal system with generative hyphae bearing clamp connections, IKI-, CB-, and cylindrical, colorless, thin-walled, smooth basidiospores measuring (8.5-10.3 × 3-4 µm). Hyphoderma mopanshanense is characterized by an annual growth habit, slight gray to cream hymenial surface, and fusiform, thick-walled cystidia apically encrusted with crystal. Sequences of ITS and LSU nrRNA gene regions of the studied samples were generated, and phylogenetic analyses were performed with maximum likelihood, maximum parsimony and Bayesian inference methods. These phylogenetic analyses based on molecular data of ITS and nLSU sequences showed that two Hyphoderma new species formed a well supported monophyletic lineage distinct from other related species and then H. fissuratum grouped with H. medioburiense and H. roseocremeum. Hyphoderma mopanshanense grouped with H. setigerum.
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