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 Triblidium 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.

Triblidium longisporum, T. stipitatum and T. daliense are described as new species within Triblidium, 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.