Freshwater ascomycetes: Phomatospora spp. from lakes in Wisconsin
Phomatospora berkeleyi and Phomatospora muskellungensis, a new species described herein, were found on submerged partially decomposed stems of Typha latifolia collected from two north temperate lakes in Wisconsin. Both species are characterized by immersed ascomata, unitunicate asci with an apical ring and striate ascospores with bipolar appendages. Phomatospora muskellungensis is distinctive in having filiform apical appendages that enlarge in water. The holotype of Phomatospora striatigera, a species morphologically similar to P. uskellungensis, is redescribed and illustrated.