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Closeup insects from the Flathead River

Page:123
Perlidae (Golden Stones) Stonefly NymphPerlidae (Golden Stones) Stonefly Nymph View 2 PicturesThis is a nymph that has recently molted thus has not yet acquired its normal coloration.
Collected June 15, 2010 from the Flathead River-upper in Montana
Added to Troutnut.com by Bnewell on June 26, 2011
Claassenia sabulosa (Golden Stone) Stonefly AdultClaassenia sabulosa (Golden Stone) Stonefly Adult View 2 PicturesThese are photos of the nymphal exuvia a sure sign that emergence is in progress, especially when you see these at the water's edge.
Collected May 24, 2007 from the Flathead River-lower in Montana
Added to Troutnut.com by Bnewell on July 1, 2011
Kathroperla perdita (Sallfly) Stonefly NymphKathroperla perdita (Sallfly) Stonefly Nymph View 1 PicturesThis species is uncommonly collected except from wells. It is a hyporheic species living in the river gravels of river floodplains until it is ready to emerge.
The head shape is an important identifier.
Collected April 15, 2010 from the Flathead River-upper in Montana
Added to Troutnut.com by Bnewell on June 26, 2011
Maccaffertium terminatum Mayfly NymphMaccaffertium terminatum  Mayfly Nymph View 1 PicturesThis is a subspecies (Subspecies: Entomologists sometimes further divide a species into distinct groups called subspecies, which have two lower-case words on the end of their scientific name instead of one. The latter is the sub-species name. For example, Maccaffertium mexicanum mexicanum and Maccaffertium mexicanum integrum are two different subspecies of Maccaffertium mexicanum.) M. terminatum terminatum, formerly called Stenonema. Found mostly in larger rivers in western Montana. This is an immature nymph.
Collected November 23, 2005 from the Flathead River-lower in Montana
Added to Troutnut.com by Bnewell on June 26, 2011
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