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|gills on hymenium|
|cap is convex|
|hymenium is free|
|ecology is saprotrophic|
Psathyrella aquatica is a species of fungus from Oregon, described in the journal Mycologia in 2010. It represents the first report of a gilled mushroom (Basidiomycota) fruiting underwater. It was found by Southern Oregon University professor Robert Coffan in the Rogue River in the U.S. state of Oregon. Coffan found the mushroom in 2005, and his colleagues Darlene Southworth and Jonathan Frank in the biology department at Southern Oregon University confirmed that the mushroom was a unique discovery. The mushroom appears to be quite strong and can stand up to fast-moving river currents.
- Frank, Jonathan L.; Coffan, Robert A.; Southworth, Darlene (July 2009). "Aquatic gilled mushrooms: Psathyrella fruiting in the Rogue River in southern Oregon". Mycologia 102 (1): 93–107. doi:10.3852/07-190. PMID 20120233.
- "What Lies Beneath: A New Mushroom". Southern Oregon University College of Arts and Sciences. January 1, 2008. Retrieved 2008-09-08.
- siskiyoudaily.com (January 25, 2008). "US: Scientists discover new mushroom species in the Rogue Valley". FreshPlaza. Retrieved 2008-09-13.
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