Three new species with 3-septate ascospores with red or orange oil when over-mature (Ascomycota, Pyrenulales, Pyrenulaceae) from China.

The lichenised fungal genus is a very common crustose lichen element in tropical to subtropical forests, but little research has been done on this genus in China. During our study on in China, based on morphological characteristics, chemical traits and molecular phylogenetic analysis (ITS and nuLSU), three new 3-septate species with red or orange oil in over-mature ascospores were found: , and Compared to the known 3-septate species of with red or orange oil, is characterised by the inspersed hamathecium; is characterised by the IKI+ red hamathecium and the existence of an unknown lichen substance; and is characterised by the absence of endospore layers in the spore tips and the absence of pseudocyphellae. It is reported for the first time that the presence of a gelatinous halo around the ascospores of is common. A word key for the species with red or orange oil in over-mature ascospores is provided.