Bryostroma acrocarpum— A Novel Muscicolous Ascomycete from New Caledonia

Bryostroma acrocarpum is a novel ascomycete species that infects the acrocarpous moss Archidium ohioense. Characteristically, the ascomata develop singly at the shoot apices. The combination of microniche occupation, ascomatal, hymenial, and hyphal features places this ascomycete in the muscicolous genus Bryostroma. This eighth species of Bryostroma is the first recorded outside Europe and only the second bryophilous fungus known to occur in New Caledonia.