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> > Siphlonurus sp.

Millcreek has attached these 5 pictures to aid in identification. The message is below.
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Intermediate nymph. About 15 mm (excluding cerci).
Intermediate nymph. About 15 mm (excluding cerci).
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Intermediate nymph. About 15 mm (excluding cerci).
Intermediate nymph. About 15 mm (excluding cerci).
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Ventral view of nymph shown in photo above.
Ventral view of nymph shown in photo above.
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Mature nymph. About 16 mm (excluding cerci).
Mature nymph. About 16 mm (excluding cerci).
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Mature nymph. About 16 mm (excluding cerci).
Mature nymph. About 16 mm (excluding cerci).
MillcreekApril 2nd, 2015, 12:53 am
Healdsburg, CA

Posts: 352
These nymphs are fairly common in the Russian River. Usually found in slightly warmer, quiet water areas near shore. Substrate usually consists of small gravel and algae-ridden stones.


The nymphs were keyed out with Merritt, Cummins and Berg (2008).
"If we knew what it was we were doing, it would not be called research, would it?"
-Albert Einstein

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