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Abstract
Paramphisphaeria is described as a new genus on the basis of the single species, P. costaricensis. It differs from Amphisphaeria spp. primarily in having bicellular ascospores with a germ slit and in having an ascus apical ring that does not become blue in iodine. It resembles Amphisphaeria in its brown color and lack of constriction at the septum of the ascospore. An anamorph is unknown. It tentatively is placed in the Xylariaceae for reasons discussed. Pachytrype rimosa is described as a new species.
This work was supported in part by National Science Foundation grants DEB-9813304 to JDR and DEB-0072684 to SH and FF and the Global Environmental Facility through its implementing agency the World Bank for the project Biodiversity Resources Development, developed by INBio and the Ministry of Environment and Energy (MINAE) in Costa Rica. We thank M.J. Adams, Washington State University, Pullman, for aid with photography.