Troutnut.com Fly Fishing for Trout Home
User Password
or register.
Scientific name search:

> > Siphlonurus sp.

Millcreek has attached these 5 pictures to aid in identification. The message is below.
View Full SizeView Full Size (2.3X larger)
Intermediate nymph. About 15 mm (excluding cerci).
Intermediate nymph. About 15 mm (excluding cerci).
View Full SizeView Full Size (2.4X larger)
Intermediate nymph. About 15 mm (excluding cerci).
Intermediate nymph. About 15 mm (excluding cerci).
View Full SizeView Full Size (2.2X larger)
Ventral view of nymph shown in photo above.
Ventral view of nymph shown in photo above.
View Full SizeView Full Size (1.9X larger)
Mature nymph. About 16 mm (excluding cerci).
Mature nymph. About 16 mm (excluding cerci).
View Full SizeView Full Size (1.9X larger)
Mature nymph. About 16 mm (excluding cerci).
Mature nymph. About 16 mm (excluding cerci).
MillcreekApril 2nd, 2015, 12:53 am
Healdsburg, CA

Posts: 295
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

Quick Reply

You have to be logged in to post on the forum. It's this easy:
Username:          Email:

Password:    Confirm Password:

I am at least 13 years old and agree to the rules.
Most Recent Posts
Re: How do you guys time your hooksets?
In General Discussion by Partsman
Looking For Battenkill III Reel or Spool
In Gear Talk by Bellfly
Re: WI contingent
In General Discussion by Wiflyfisher (Logboy73 replied)
Re: What's everybody been up to?
In General Discussion by David82nd (Partsman replied)
Re: A Float Down the Manistee and a little extra...
In the Photography Board by Oldredbarn (Roguerat replied)
Second opinions on this one's ID?
In Male Rhithrogena morrisoni Mayfly Spinner by Troutnut
Site updates from June 22, 2017
In Site Updates by Troutnut
Re: Polymitarcyidae Question
In the Mayfly Species Ephoron album by Steamntrout (Crepuscular replied)
Re: Trout characteristics
In General Discussion by David82nd
Re: a recent foray into the land of dry flies and wild trout
In General Discussion by Crepuscular (JohnR replied)