Abstract
In this study, we report the discovery of
Jahnula dianchia
sp. nov., a freshwater lignicolous fungus belonging to the order Jahnulales (Dothideomycetes, Ascomycota), from a submerged woody substrate from Dianchi Lake, Yunnan, China. Morphologically, this new taxon differs from other species of the genus in ascospore morphology; the ascospores of the new species are dark brown with mammiform apices. We also provide a phylogenetic tree showing the molecular relationships between the new taxon with the previously accepted
Jahnula
species. The analysis of combined ITS, LSU, and SSU sequence dataset places
J
.
dianchia
within the Jahnulales sister to
J
.
sangamonensis
. The phylogeny also shows the placement of both strains of
J
.
dianchia
in a well-supported independent sub-clade.