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> > Probably an immature Paragnetina media



The Specimen

Paragnetina media (Embossed Stonefly) Stonefly NymphParagnetina media (Embossed Stonefly) Stonefly Nymph View 3 Pictures
Collected March 13, 2005 from Cascadilla Creek in New York
Added to Troutnut.com by on April 5, 2006

The Discussion

Post Reply
GONZOOctober 4th, 2006, 2:01 pm
Site Editor
"Bear Swamp," PA

Posts: 1681		The row of spinules, absence of anal gills, and overall hairiness are all consistent with immature P. media. (The mature nymphs are cleaner, darker, and less hairy.)

I would also suggest altering the Paragnetina page to say that media is very important in both the East and Midwest. (media is probably the most widespread and commonly encountered large member of the Perlidae in the East. Due to its tolerance and adaptability it is often found in streams that have few other stonefly species.) The "accepted" (Stark, et al.) common names are Embossed Stone for media and Beautiful Stone for immarginata.
TroutnutOctober 4th, 2006, 2:19 pm
Administrator
Bellevue, WA

Posts: 2737		Thanks. I've made the suggested changes.
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist
DkakJanuary 19th, 2010, 9:37 am
Posts: 1I'm working with some of these "hairy" Paragnetina from Vermont right now. I've found them difficult to key out because their gills are only somewhat branched, ocelli are difficult to see on many individuals, and the inner fringe of long hairs on the cerci is not present (probably due to immaturity). These pictures helped a bunch!

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