Jahnula morakotii sp. nov. and J. appendiculata from a peat swamp in Thailand

During a long-term study of wood colonization by freshwater fungi in the Sirindhorn peat swamp forest in the south of Thailand, two interesting Jahnula species were encountered. Jahnula appendiculata occurred commonly on eight species of timber, while J. morakotii occurred only once. Jahnula morakotii differs from all other Jahnula species in having the smallest ascospores with bipolar cellular appendages and lacking a sheath. The morphology of J. morakotii is illustrated and compared with other species in the genus.