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

> > Nixe species (kennedyi?)

Millcreek has attached these 7 pictures to aid in identification. The message is below.
View Full SizeView Full Size (2X larger)
Color variation #1. 10 mm (excluding cerci). Live specimen. Collected May 29, 2014.
Color variation #1. 10 mm (excluding cerci). Live specimen. Collected May 29, 2014.
View Full SizeView Full Size (2.4X larger)
Color variation #1. 7 mm (excluding cerci). Live specimen. Collected May 13, 2014.
Color variation #1. 7 mm (excluding cerci). Live specimen. Collected May 13, 2014.
View Full SizeView Full Size (2.2X larger)
Color variation #1. 7 mm (excluding cerci). Live specimen. Collected May 13, 2014.
Color variation #1. 7 mm (excluding cerci). Live specimen. Collected May 13, 2014.
View Full SizeView Full Size (2.3X larger)
Color variation #1. 6 mm (excluding cerci). In alcohol. Collected May 5, 2012.
Color variation #1. 6 mm (excluding cerci). In alcohol. Collected May 5, 2012.
View Full SizeView Full Size (2.4X larger)
Color variation #1. 6 mm (excluding cerci). In alcohol. Collected May 5, 2012.
Color variation #1. 6 mm (excluding cerci). In alcohol. Collected May 5, 2012.
View Full SizeView Full Size (1.6X larger)
Color variation #2. 9 mm (excluding cerci). Live specimen. Collected May 17, 2014.
Color variation #2. 9 mm (excluding cerci). Live specimen. Collected May 17, 2014.
View Full SizeView Full Size (1.5X larger)
Color variation #2. 9 mm (excluding cerci). Live specimen. Collected May 17, 2014.
Color variation #2. 9 mm (excluding cerci). Live specimen. Collected May 17, 2014.
MillcreekSeptember 25th, 2014, 7:07 pm
Healdsburg, CA

Posts: 344
These nymphs are abundant in the Russian River from April to June. I've keyed them out to Nixe using Merritt, Cummins and Berg but have been unable to ID them to species. The only Nixe species I've been able to find recorded from California is N. kennedyi but the nymphs are not described and I haven't collected any adults in the area. Does anybody know anything more about the nymphs?

The nymphs seem to have two distinct pattern types. Not sure if that's just a color variation or whether they could be two different species. Photos show the two variations.
"If we knew what it was we were doing, it would not be called research, would it?"
-Albert Einstein
CrenoSeptember 25th, 2014, 7:28 pm
Grants Pass, OR

Posts: 302
Millcreek - are you collecting both forms at the same time/place? creno
MillcreekSeptember 25th, 2014, 7:33 pm
Healdsburg, CA

Posts: 344
Dave - Yes, although variation #2 tends to show up about a week later. I've often collected both forms off the same rock.
"If we knew what it was we were doing, it would not be called research, would it?"
-Albert Einstein
EntomanSeptember 27th, 2014, 12:14 am
Northern CA & ID

Posts: 2604
I can't make out the mouthparts but the head spots and small lateral spines clearly agree with your assessment. Perhaps the difference between the two is due to dimorphism.
"It's not that I find fishing so important, it's just that I find all other endeavors of Man equally unimportant... And not nearly as much fun!" Robert Traver, Anatomy of a Fisherman
MillcreekSeptember 27th, 2014, 11:46 am
Healdsburg, CA

Posts: 344
Perhaps the difference between the two is due to dimorphism.

It could be. Either two variations in the same species or differences between male and female. Probably more likely than two species. Separating the two variations and rearing the mature nymphs should provide answers. Hope to be set up next year for rearing nymphs.
"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: diff between march brown &gray fox
In the Mayfly Species Maccaffertium vicarium by Jrcald
7Mar 13, 2007
by Troutnut
Re: Help with ID
In the Identify This! Board by Calloway
2Jul 9, 2008
by Wiflyfisher
Re: Isonychia velma nymphs
In the Photography Board by Millcreek
7Aug 19, 2014
by Oldredbarn
Re: Olives
In the Identify This! Board by Martinlf
3May 3, 2009
by Martinlf
Re: Great Red Quill
In Female Timpanoga hecuba Mayfly Dun by Entoman
19Oct 2, 2013
by Jmd123
Re: Ephemerella maculata
(1 more)

In the Photography Board by Millcreek
3Apr 12, 2015
by PaulRoberts
Re: wanted: bug collectors
In General Discussion by Konchu
25May 10, 2013
by Jodea
Re: Recent evenings at the Drake Hotel
In General Discussion by Crepuscular
45Oct 8, 2014
by TroutBums
Re: First spoils of my bug-rearing aquarium
In Male Stictochironomus Midge Adult by Troutnut
19Jan 21, 2008
by Troutnut
Re: Need ID help please
In the Identify This! Board by Gastriper
20Jan 13, 2015
by Taxon
Most Recent Posts
Re: traditional streamers- still in use?
In General Discussion by Roguerat (Wiflyfisher replied)
Re: Boulder-hopping on the Middle Fork of the Snoqualmie
In Site Updates by Troutnut
Re: Fall ISO's - Au Sable
In General Discussion by Brian314 (Partsman replied)
Re: The white winged curse!
In General Discussion by Partsman (Brian314 replied)
Re: Ephemerella nymph
In Ephemerella aurivillii Mayfly Nymph by Millcreek (Troutnut replied)
Re: Need advice on fly line.
In Gear Talk by Montanafish (Red_green_h replied)
Re: Fly Fishing Rookie
In Gear Talk by Tor (Red_green_h replied)
Re: Timpanoga hecuba
In the Identify This! Board by Leskorcala
Re: Exploring up the Skykomish
In Site Updates by Troutnut (Martinlf replied)
Re: mean one thing, write another?
In Male Onocosmoecus unicolor Caddisfly Adult by Creno