Global diversity and taxonomy of the Inonotus linteus complex (Hymenochaetales, Basidiomycota): Sanghuangporus gen. nov., Tropicoporus excentrodendri and T. guanacastensis gen. et spp. nov., and 17 new combinations

• Although Inonotus linteus complex is placed in thegenus Inonotus, its perennial basidiocarps with a dimitic hyphalsystem, at least in the trama, distinguish the complex from otherspecies in the genus, which have an annual habit and amonomitic hyphal system. The species number of Inonotuslinteus complex has been increased in China and tropicalAmerica in recent publications. However, whether species inthis complex belong to Inonotus has not specifically been addressed.To explore the phylogenetic placement of species ofInonotus linteus complex, we performed a comprehensivestudy using morphological and phylogenetic data based onglobal samples. nLSU (53 with 13 new) and ITS (70 with 18new) datasets were used to produce the phylogenetic results.Taking into consideration the phylogenies inferred from thenLSU and ITS datasets, Inonotus is a polyphyletic genus comprisingat least three clades. Clade A, the core Inonotus clade,contains the generic type, Inonotus hispidus, while Clades Band C comprise species from the Inonotus linteus complex.Morphological and phylogenetic evidence indicates thatClades B and C are new genera, and Sanghuangporus andTropicoporus are introduced in this study. Ten species are transferredto Sanghuangporus and seven to Tropicoporus.Tropicoporus excentrodendri and T. guanacastensis spp. nov.are described, and their distinctive characters are discussed.Keys to the two new genera and the Inonotus sensu stricto,and to species of each new genus are provided.

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NATURVETENSKAP  -- Biologi -- Biologisk systematik (hsv//swe)

NATURAL SCIENCES  -- Biological Sciences -- Biological Systematics (hsv//eng)

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