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

> > Isoperla marmorata and Taenionema pacificum

Millcreek has attached these 4 pictures to aid in identification. The message is below.
View Full SizeView Full Size (2.8X larger)
Isoperla marmorata
Isoperla marmorata
View Full SizeView Full Size (2.8X larger)
Isoperla marmorata
Isoperla marmorata
View Full SizeView Full Size (1.9X larger)
Taenionema pacificum
Taenionema pacificum
View Full SizeView Full Size (1.9X larger)
Taenionema pacificum
Taenionema pacificum
MillcreekFebruary 21st, 2018, 11:50 am
Healdsburg, CA

Posts: 315
I've had the Isoperla species in here before but it was dead when photographed and these are live. Species were identified to genus using "An Introduction to the Aquatic Insects of North America" by Merritt, Cummins and Berg (2008). They were identified to species using "The Isoperla of California (Plecoptera: Perlodidae) Larval Descriptions and a Key to 17 Western Nearctic Species" by J.B. Sandberg.(2011).
http://www2.pms-lj.si/illiesia/papers/Illiesia07-22.pdf
And "New Descriptions of North American Taenionema Larvae (Plecoptera; Taeniopterygidae)" by K.W. Stewart (2009).http://www.zobodat.at/pdf/Illiesia_05_0128-0145.pdf

The nymphs were collected 2/20/18 in shallow, fast water with small to medium gravel. The Isoperla marmorata was 13-15 mm and the Taenionema pacificum was 9-12 mm.
"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.

Related Discussions

TitleRepliesLast Reply
Re: Isoperla pinta
In the Identify This! Board by Millcreek
4Dec 6, 2016
by PaulRoberts
Re: Chloroperlidae
In Isoperla Stonefly Adult by Teamrenna
3Sep 9, 2008
by GONZO
Re: Calineuria californica and Hesperoperla pacifica
(3 more)

In the Photography Board by Millcreek
1Jan 30, 2016
by Martinlf
Probably Perlesta
In Female Perlesta Stonefly Adult by GONZO
0
Re: Isoperla nymphs
(2 more)

In the Photography Board by Millcreek
6Sep 4, 2014
by Oldredbarn
Capnia umpqua
(2 more)

In the Photography Board by Millcreek
0
Re: Arcynopteryx compacta
In Site Updates by Bnewell
1Jul 19, 2012
by Taxon
Re: Check out this very unusual trout
In General Discussion by Wbranch
6Nov 12, 2014
by PaulRoberts
Re: Kogotus / Rickera and Isoperla mormona pictures
In the Photography Board by Millcreek
4May 11, 2017
by Millcreek
Acentrella insignificans nymphs
(1 more)

In the Photography Board by Millcreek
0
Most Recent Posts
Middle Fork Snoqualmie after work
In Site Updates by Troutnut
Re: Casting Help
In Beginner Help by RascalWinW (Iasgair replied)
Re: Trico emergers
In the Mayfly Genus Tricorythodes by Bwoklink (Afishinado replied)
Re: Trico Tips
In the Mayfly Genus Tricorythodes by Martinlf (Wbranch replied)
Re: What did you do on the Fourth of July? I went fishing...for a little while...
In the Photography Board by Jmd123 (Wbranch replied)
Re: Furled leaders
In Gear Talk by Adirman
Re: Bug Sprays and DEET alternatives?
In General Discussion by TimCat (Partsman replied)
Re: Evening exploring small streams
In Site Updates by Troutnut (Wbranch replied)
Re: A big day on small streams
In Site Updates by Troutnut (Jmd123 replied)
Evening on the South Fork Snoqualmie
In Site Updates by Troutnut