Cucurbitariaceae has a high biodiversity worldwide on various hosts and is distributed in tropical and temperate regions. Woody litters collected in Changchun, Jilin Province, China, revealed a distinct collection of fungi in the family Cucurbitariaceae based on morphological and molecular data. Phylogenetic analyses of the concatenated matrix of the internal transcribed spacer (ITS) region, the large subunit (LSU) of ribosomal DNA, the RNA polymerase II subunit (rpb2), the translation elongation factor 1-alpha (tef1-α) and β-tubulin (β-tub) genes indicated that the isolates represent Allocucurbitaria and Parafenestella species based on maximum likelihood (ML), maximum parsimony (MP) and Bayesian analysis (BPP). We report four novel species: Allocucurbitaria mori, Parafenestella changchunensis, P. ulmi and P. ulmicola. The importance of five DNA markers for species-level identification in Cucurbitariaceae was determined by Assemble Species by Automatic Partitioning (ASAP) analyses. The protein-coding gene β-tub is determined to be the best marker for species level identification in Cucurbitariaceae.
Keywords: ASAP; Pleosporales; fungal barcode; multi-loci phylogeny; northeast China; taxonomy.