A new species of Mycena sect. Exornatae and some taxonomic observations

Mycena snigdha sp. nov. is described from Kerala state, India and is assigned to sect. Exornatae. Comprehensive description, photographs, and comparisons with phenetically similar species are provided. The wide, loop-like clamp connections of M. snigdha are remarkably similar to those of species of Mycena sect. Ingratae and this observation reveals that loop-like clamp connections can no longer be used to differentiate sect. Ingratae from sect. Exornatae and supports a recent treatment of sect. Ingratae as a synonym of section Exornatae. Within sect. Exornatae, however, this feature seems to be useful in species segregation. Mycena fumosa, an Australian species currently placed in sect. Sacchariferae, is considered as belonging to sect. Exornatae.