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).

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Intermediate nymph. About 15 mm (excluding cerci).

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Ventral view of nymph shown in photo above.

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Mature nymph. About 16 mm (excluding cerci).

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Mature nymph. About 16 mm (excluding cerci).

Millcreek	April 2nd, 2015, 12:53 am
Healdsburg, CA Posts: 356	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).

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