Journal
MYCOLOGIA
Volume 102, Issue 1, Pages 33-38Publisher
TAYLOR & FRANCIS INC
DOI: 10.3852/09-096
Keywords
aquatic fungi; herbaceous; Nymphaea odorata; saprophyte; systematics
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Funding
- National Science Foundation (NSF) [03-16496]
- Division Of Environmental Biology [0844722] Funding Source: National Science Foundation
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Alascospora evergladensis, a freshwater ascomycete collected from submerged dead petioles of Nymphaea odorata during a survey of aquatic fungi along a phosphorus gradient in the Florida Ever glades, is described and illustrated as a new genus and species in the Pleosporales (Pleosporomycetidae, Dothideomycetes). The new fungus is unique among genera in the Pleosporales based oil a combination of morphological characters that include light brown, translucent, membranous, ostiolate ascomata with dark, amorphous material irregularly deposited oil the peridium, especially around the ostiole; globose, fissitunicate, thick-walled asci; septate pseudoparaphyses; and 1-septate ascospores that are hyaline when young, and surrounded by a hyaline gelatinous sheath that is wing-shaped in outline oil each side of the ascospore. The sheath is distinctive in that it first expands in water and is translucent, then condenses and darkens around older ascospores, giving them a dark brown, verruculose appearance.
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