Troutnut Forum

>

Get Bugs Identified

> Bitterroot river April mayfly nymph ?

Leskorcala	April 7th, 2020, 7:41 pm
Posts: 16	Love to pick few brains to ID this black and white mayfly nymph I just collected one on Bitterroot river in Montana April 7th I found it under tree trunk Thanks
Millcreek	April 8th, 2020, 9:28 am
Healdsburg, CA Posts: 350	Definitely a member of Heptageniidae. Might be a Rhithrogena. If you still have the specimen, put it on it's back and see if the gills form a "suction cup", or if they meet in front and back, like in this picture. https://calphotos.berkeley.edu/cgi/img_query?enlarge=0000+0000+0816+0153
	"If we knew what it was we were doing, it would not be called research, would it?" -Albert Einstein
Leskorcala	April 8th, 2020, 9:08 pm
Posts: 16	Thank you for your help fortunately i did not collect the specimen, i will try next time out.Very different in black and white or cream markings which i have not seen often.
Millcreek	April 8th, 2020, 9:25 pm
Healdsburg, CA Posts: 350	I'm guessing at Rhithrogena. Seems likely because of the general aspect of it. The color is unusual for Rhithrogena but there are several undescribed species of western Rhithrogena nymphs.
	"If we knew what it was we were doing, it would not be called research, would it?" -Albert Einstein
Konchu	April 10th, 2020, 10:50 am
Site Editor Indiana Posts: 498	That looks like my search image of a living Rhithrogena. I'm only aware of R. undulata having been found in the Bitterroot R in MT, but like Millcreek said, we don't know as much about the nymphs as we'd like. The record I have was from a June emergence, FWIW.

Quick Reply

Related Discussions

Title	Replies	Last Reply
Re: Skwala question In Skwala Stonefly Nymph by Gillybilly	6	Feb 20, 2020 by Leskorcala
Re: Second opinions on this one's ID? In Male Rhithrogena morrisoni Mayfly Spinner by Troutnut	3	Jul 5, 2017 by Crepuscular
Re: Identify In General Discussion by Lastchance	1	Jun 17, 2012 by Taxon
Suwallia sp. In the Photography Board by Millcreek	0
Paraleptophlebia sp. (2 more) In the Photography Board by Millcreek	0
Re: Ecdyonurus spp, with Symbiocladius parasites In the Identify This! Board by Millcreek	5	Jan 11, 2015 by Entoman
Re: Montana Western March Brown Dun In the Photography Board by Leskorcala	2	Apr 10, 2020 by Partsman
Re: Chile in early March In General Discussion by EricStroup	9	Dec 14, 2007 by Jmd123
Re: Isonychia velma nymphs In the Photography Board by Millcreek	7	Aug 19, 2014 by Oldredbarn
Possibly Gray Drake collected April Bitterroot river In the Identify This! Board by Leskorcala	0

Troutnut.com is copyright © 2004-2021 Jason Neuswanger (email Jason). See my FAQ for information about use of my images. privacy policy