First high-quality genome assembly of <i>Umbelopsis nana</i> isolated from forest soil

Species of the genus Umbelopsis are ubiquitous soil saprotrophic fungi known for their role in ecological nutrient cycling and biotechnological potential in lipid production. Here, we present the genome assembly of Umbelopsis sp. strain THIF13, which is characterized by its capability to produce carbonyl sulfide (COS). Using PacBio Sequel long-read data, a high-quality genome assembly was generated comprising 18 contigs totaling 27.2 Mb, which is larger than other Umbelopsis genomes, with an N50 of 1.77 Mb. Notably, 16 contigs were flanked by telomeric repeats at both ends. The assembly showed high completeness, with 98.1% complete Benchmarking Universal Single-Copy Orthologs (BUSCOs) and 11.15% repetitive sequences. Multi-locus phylogenetic analysis clearly identified the strain as Umbelopsis nana; thus, this study reports the first publicly available genome sequence for this species. Functional annotation with Funannotate predicted 9,068 genes. This genomic resource fills a gap in the Umbelopsis phylogeny and provides a foundation for elucidating the evolutionary and functional diversity of the genus.