Updating the diversity: three novel species of Triblidium (Triblidiaceae, Rhytismatales) in west Yunnan, China

During a survey of discomycetes in Yunnan, China, three saprobic species of <i>Triblidium</i> were discovered on decayed wood and the bark of living oak trees. These species are characterised by black cleistohymenial apothecia with 6-8 teeth-like lobes, which can be either stipitate or sessile, with greyish-white to orange hymenium, a well-developed covering and basal stroma, consisting of carbonised to hyaline angular cells or hyaline hyphae, with a subhymenium composed of hyaline angular cells, clavate, J- asci, with an elliptical or rounded apex and long acicular and ellipsoidal ascospores with multiple septa. <i>Triblidium longisporum</i>, <i>T. stipitatum</i> and <i>T. daliense</i> are described as new species within <i>Triblidium</i>, supported by both morphological features and phylogenetic analyses of the LSU-ITS-mtSSU dataset. Detailed descriptions, illustrations and multi-gene analyses fully support each species.