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Millcreek | September 24th, 2020, 9:28 pm | |
Healdsburg, CA Posts: 356 | Jason, I think this nymph may be Ephemerella tibialis. I am basing this on the following papers by Allen and Edmunds. http://www.ephemeroptera-galactica.com/pubs/pub_a/puballenr1963p583.pdf http://www.ephemeroptera-galactica.com/pubs/pub_a/puballenr1965p244.pdf Ephemerella tibialis is in the paper on Serratella. | |
Troutnut | September 26th, 2020, 10:53 am | |
Administrator Bellevue, WAPosts: 2737 | I was using this more recent key from Jacobus et al (not sure where to find a PDF online at the moment): Jacobus, L. M., N. A. Wiersema and J. M. Webb. 2014. Identification of Far Northern and Western North American mayfly larvae (Insecta: Ephemeroptera), north of Mexico. Joint Aquatic Science meeting, Portland, OR. 176 pp. + suppl. Unpublished workshop manual. Here's the relevant key couplet: 81e) Maxillary canines strongly serrate laterally; thoracic nota with small, brown excrescences (sometimes difficult to detect), especially between forewingpads = Ephemerella (Vittapallia) tibialis (very similar to E. nuda) I think I did find a number of E. tibialis nymphs earlier this year in Idaho. Here's one of them. I remember being able to make out the highly serrate canines pretty clearly and possibly the excresences, and I couldn't find either one on this specimen. However, I don't have the greatest microscope and am hoping to get a better one soon, so I might take a closer look. | |
Jason Neuswanger, Ph.D. Troutnut and salmonid ecologist | ||
Title | Replies | Last Reply |
Re: Ephemerella tibialis In Male Serratella micheneri Mayfly Nymph by Millcreek | 2 | Dec 26, 2019 by Millcreek |
Re: Brown Dun hatch/swarm time? In the Mayfly Species Ameletus ludens by Konchu | 10 | Apr 30, 2009 by Troutnut |
Re: Mix-up In Siphlonurus autumnalis Mayfly Nymph by GONZO | 2 | Jul 2, 2011 by Troutnut |
Re: Ephemerella dorothea infrequens ? (2 more) In the Identify This! Board by Millcreek | 25 | Jan 8, 2016 by Wbranch |
Re: Dobsonfly In General Discussion by FredH | 8 | Mar 28, 2014 by Taxon |
Re: Ephemerella maculata (1 more) In the Photography Board by Millcreek | 3 | Apr 12, 2015 by PaulRoberts |
Re: Serratella micheneri nymphs In the Photography Board by Millcreek | 2 | Oct 13, 2014 by Millcreek |
Re: species taxonomy In the Mayfly Genus Caudatella by Konchu | 3 | Oct 30, 2010 by Taxon |
Re: Ephemerellinae In the Mayfly Family Ephemerellidae by GONZO | 7 | Oct 4, 2008 by GONZO |
Re: Korean Bugs (2 more) In the Identify This! Board by FisherOfMen | 7 | Jul 11, 2016 by Gilsau |