Paramphibambusabambusicola gen. et. sp. nov., Arecophilaxishuangbannaensis and A.zhaotongensis spp. nov. in Cainiaceae from Yunnan, China.

Morphological comparisons and multi locus phylogenetic analyses (base on the combined genes of ITS, LSU, rpb 2 and tub ) demonstrated that three new saprobic taxa isolated from bamboo belong to Cainiaceae. These taxa comprise a novel genus Paramphibambusa ( P.bambusicola sp. nov. ) and two new species, Arecophilaxishuangbannaensis and A.zhaotongensis . The three new taxa belong to Cainiaceae (Xylariales, Sordariomycetes) a poorly studied family, which now comprises eight genera. Paramphibambusa can be distinguished from other Cainiaceae genera in having ascomata with a neck and ascospores lacking longitudinal striation, germ slits or germ pores. The two new Arecophila species clustered in a clade with Arecophila sp. and A.bambusae . Detailed morphological descriptions, illustrations, and an updated phylogenetic tree are provided for the new taxa.