This paper highlights the taxonomy of some interesting saprobic microfungi associated with dead plant materials of Hedychium coronarium, Lilium longiflorum, and Magnolia species. The taxa reported in this study belong to the orders Pleosporales and Kirschsteiniotheliales (Dothideomycetes). These taxa were identified based on multi-locus phylogeny of nuclear ribosomal DNA (rDNA) (LSU, SSU, and ITS) and protein-coding genes (tef1-α and rpb2), together with comprehensive morphological characterization. Two novel saprobic species, Leptoparies magnoliae sp. nov. and Neobambusicola magnoliae sp. nov., are introduced from Magnolia species in Thailand. Another new species, Asymmetrispora zingiberacearum sp. nov., is also described from dead stems of H. coronarium, which is the first asexual morph species of the genus Asymmetrispora. In addition, Ramusculicola thailandica and Kirschsteiniothelia thailandica are reported as new host records from dead twigs of Magnolia species. Sphaerellopsis paraphysata is reported as a new host record from L. longiflorum. Newly described taxa are compared with other similar species and detailed descriptions, micrographs, and phylogenetic trees to show the positions are provided.
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