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Abstract
A new species of hypogeous Pezizales, Mattirolomyces tiffanyae, is described and illustrated. Its asci are typically three-spored, an unusually small number in the non-Tuber Pezizales. Ascus septal pore ultrastructure consists of a uni- or bi-convex band, which suggests an affinity with the Pezizaceae. Secondary spore-wall development is similar to that of Peziza, and several species of hypogeous Pezizaceae.
The author gratefully acknowledges financial support for this study from an Iowa State University Professional Advancement Grant and a grant from the Iowa Science Foundation. Christine Notis is thanked for her collection, Dr. Lynn Clark and Dr. James Trappe are thanked for their help with the Latin diagnosis and for helpful comments and suggestions for improving this manuscript, Deborah Lewis is thanked for assistance with accession of ascocarps, and Dr. Trappe is thanked for information on T. decaryi. The Bessey Microscopy Facility at Iowa State University is thanked for the use of its equipment.
