Additions to Diatrypaceae ( Xylariales ): Novel Taxa and New Host Associations

members have a broad distribution and are commonly found on decaying wood. Despite taxonomic and morphological challenges within this group, there has been a growing interest in in recent years. The dead branches of several plant hosts with fungal fruiting bodies were collected from Doi Tung National Park, Chiang Rai, and the Narathiwat Provinces in Thailand. Their morphological characteristics, coupled with a molecular phylogeny of combined ITS and 2 sequence data, were used to introduce two novel species ( and ) and one new species ( ). Moreover, four new host records, , , , and on , , , and , respectively, as well as a new geographical record of are reported. This research provides detailed descriptions of macro- and microcharacteristics, coupled with a phylogenetic tree for the newly introduced species and host records. The morphological features of and are listed in the synoptic table.