Salmonflies
Pteronarcys californica
The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.
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This is the first of it's family I've seen, collected from a tiny, fishless stream in the Cascades. The three species of this genus all live in the Northwest and are predators that primarily eat stonefly nymphs Merritt R.W., Cummins, K.W., and Berg, M.B. (2019).
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Millcreek on Oct 3, 2014October 3rd, 2014, 8:39 am EDT
Acentrella insignificans nymphs are abundant in the Russian River from early January through April. Most are found in riffles or at the edge of riffles, also found in lesser numbers in glides. They prefer a substrate of clean gravel and cobble. Large numbers of nymphs are often found on the underside of cobbles.
The nymphs were identified to genus using Merritt, Cummins and Berg (2008). They were identified to species using Morihara and McCafferty's "The Baetis Larvae of North America (Ephemeropttera:Baetidae) (1979). They are listed in this account under the synonym Baetis insignificans. http://www.ephemeroptera-galactica.com/pubs/pub_m/pubmoriharad1979p139.pdf I also used Jacobus and McCafferty's key for North American Acentrella larvae in "A new species of Acentrella Bergsstrom (Ephemeroptera:Baetidae) from Great Smoky Mountains National Park, USA" (2006).http://www.ephemeroptera-galactica.com/pubs/pub_j/pubjacobusl2006p101.pdf
The nymphs were identified to genus using Merritt, Cummins and Berg (2008). They were identified to species using Morihara and McCafferty's "The Baetis Larvae of North America (Ephemeropttera:Baetidae) (1979). They are listed in this account under the synonym Baetis insignificans. http://www.ephemeroptera-galactica.com/pubs/pub_m/pubmoriharad1979p139.pdf I also used Jacobus and McCafferty's key for North American Acentrella larvae in "A new species of Acentrella Bergsstrom (Ephemeroptera:Baetidae) from Great Smoky Mountains National Park, USA" (2006).http://www.ephemeroptera-galactica.com/pubs/pub_j/pubjacobusl2006p101.pdf
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