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  • Didymosphenia geminata - Wikipedia
    Didymosphenia geminata is a diatom, which is a type of single-celled organism unique for their silica (SiO 2) cell walls The life history of diatoms includes both vegetative and sexual reproduction, though the sexual stage is not yet documented in this species
  • Invasive Species: Didymo or Rock Snot - U. S. National Park Service
    Didymo (Didymosphenia geminata) is a type of invasive algae that attaches to plants, rocks, and other hard substrates in rivers and streams Also called “rock snot” due to its slimy appearance, Didymo can produce thick mats that cover stream beds—making swimming, fishing, and other water activities undesirable
  • Didymo | National Invasive Species Information Center
    Was present in Canada in the late 1800s, but did not begin to cause problems until the early 1990s It was first discovered east of the Mississippi River in 2005 in Tennessee (Bergey et al 2009; Spaulding and Elwell 2007)
  • Didymosphenia geminata | Species - Diatoms of North America
    Didymosphenia geminata is known by the common name, 'didymo' It attaches by a mucopolysaccaride stalk to benthic substrates in flowing waters and splash zones of lakes
  • didymo (Didymosphenia geminata) - Species Profile
    Didymosphenia geminata typically blooms in streams with low to undetectable levels of phosphorous Short-term nitrogen and phosphorus additions followed by nutrient limitation have been reported to increase cell densities and division rates, possibly accelerating mat formation
  • Didymo (or Rock Snot) - Center for Invasive Species Research
    Didymo (or Rock Snot) Didymosphenia geminata(Bacilariophyceae: Cymbellales) The Situation: Didymo or rock snot, is a highly invasive species of freshwater diatom that can form large and extensive mats in rivers, streams, and lakes
  • didymo, rock snot: Didymosphenia geminata (Cymbellales: Cymbellaceae . . .
    Didymosphenia geminata is a freshwater, single cell, diatom (a type of algae) which attaches itself to a solid surface such as a rock with a stalk It is light brown, brownish yellow, or white, looking very much like wet toilet paper
  • didymo, rock snot (Didymosphenia geminata (Lyngbye) M. Schmidt) - EDDMapS
    Didymosphenia geminata is a freshwater, single-cell, diatom (a type of algae) which attaches itself to a solid surface such as a rock with a stalk It is light brown, brownish yellow, or white, looking very much like wet toilet paper
  • Hydrilla Aquatic Invasive Species factsheet
    Didymo Didymosphenia geminata Photo courtesy of New Hampshire Department of Environmental Services Didymo commonly referred to as “rock snot”, is a species of freshwater diatom native to cool water regions of northern Europe and North America
  • Invasive Species: Didymo (Rock Snot) - State of Michigan
    (Didymosphenia geminata) Didymo (also known as "rock snot") is a microscopic algae (diatom) that produces stalks that form thick mats on hard surfaces like rocks in stream beds





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