Aquatic Insect #14 ID?

Discussion in 'Fly Fishing Entomology' started by Taxon, Oct 3, 2012.

  1. Taxon

    Taxon Moderator Staff Member

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    Can you identify this aquatic insect by any of the following?

    Order common name
    Order taxonomic name
    Family common name
    Family taxonomic name
    Genus common name
    Genus taxonomic name
    Lifestage
     
  2. Gary Knowels

    Gary Knowels Active Member

    Mayfly, ephemeroptera, nymph

    And I'll guess hexagenia

    Sent from my SGH-T679 using Tapatalk 2
     
  3. Taxon

    Taxon Moderator Staff Member

    Hi Gary-

    Mayfly, ephemeroptera, nymph are correct. However, Hexagenia nymphs are burrowers. Please see Mayfly Behavioral Categories.

    IDENTIFICATIONS

    Order common name: Mayfly (Gary Knowels)
    Order taxonomic name: Ephemeroptera (Gary Knowels)
    Family common name: ???
    Family taxonomic name: ???
    Genus common name: ???
    Genus taxonomic name: ???
    Lifestage: Nymph (Gary Knowels)
     
  4. jwg

    jwg Active Member

    Looks like a clinger to me.

    Which would put it in rivers.

    I see three tails.

    That would narrow it down to about 15 genera in the pacific nw.

    This could be tough.

    Jay
     
  5. Taxon

    Taxon Moderator Staff Member

    Hi Jay-

    Fair enough. It was photographed in early September in King County from the Cedar River.
     
  6. Gary Knowels

    Gary Knowels Active Member

    Heptageniidae?
     
  7. Taxon

    Taxon Moderator Staff Member

    Hi Gary-

    Sure is.

    IDENTIFICATIONS

    Order common name: Mayfly (Gary Knowels)
    Order taxonomic name: Ephemeroptera (Gary Knowels)
    Family common name: ???
    Family taxonomic name: Heptageniidae (Gary Knowels)
    Genus common name: ???
    Genus taxonomic name: ???
    Lifestage: Nymph (Gary Knowels)
     
  8. Travis Bille

    Travis Bille Active Member

    Would that make the common family name the "flathead mayflies"
     
  9. Taxon

    Taxon Moderator Staff Member

    Sure would.

    IDENTIFICATIONS

    Order common name: Mayfly (Gary Knowels)
    Order taxonomic name: Ephemeroptera (Gary Knowels)
    Family common name: Flatheaded Mayflies (Travis Bille)
    Family taxonomic name: Heptageniidae (Gary Knowels)
    Genus common name: ???
    Genus taxonomic name: ???
    Lifestage: Nymph (Gary Knowels)
     
  10. kelvin

    kelvin Active Member

    Ephemerella dorothea dorothea ?
     
  11. Taxon

    Taxon Moderator Staff Member

    Hi Kelvin-

    Welcome to the Flyfishing Entomology subforum, and congratulations on having the courage to get your feet wet. However, genus Ephemerella is in family Ephemerellidae (Spiny Crawler Mayflies), whereas this mayfly is in family Heptageniide (Flatheaded Mayflies).
     
  12. kelvin

    kelvin Active Member

    What is Rhithrogena for 200 ?
     
  13. Gary Knowels

    Gary Knowels Active Member

    Ecdyonursus simplicioides, Pale Western Cahill?

    Info from Nymphs Volume I: The Mayflies by Schwiebert
     
  14. jwg

    jwg Active Member

  15. Taxon

    Taxon Moderator Staff Member

    Hi Kelvin, Gary, and Jay-

    Yes, as Jay (and maybe Gary) cleverly discovered, I also believe this mayfly to be of genus Ecdyonurus. However, as my opinion is not infallible, in an attempt to avoid making an erroneous identification here on the Flyfishing Entomology Subfrom (in my own backyard, so-to-speak), I emailed a practicing professional entomologist with whom I've had previous contact, and requested a second opinion. Have not yet heard back from him.

    As Jay accurately points out, my Adult Mayfly Identification query does not list genus Ecdyonurus. The query was developed in February of 2004, and at the time, I did not have access to all of the required attributes of genus Ecdyonurus adults, so they was not included in the query.

    However in May of 2009, I developed N. American Mayfly Species Query. This is a much more powerful and sophisticated query. It lists all mayfly species (or subspecies) recognized by Mayfly Central. In addition, it allows searching on (and selective listing of) taxonomic and descriptive body part (and various other) fields for nymphs, duns, and spinners. And perhaps best of all, it allows single click display of all fields contained in the database for that particular species (or subspecies). Enjoy. ;)
     
  16. Taxon

    Taxon Moderator Staff Member

    Hi Gary,

    Just this evening, I received back (what I consider to be) adequate confirmation of genus Ecdyonurus. As to the genus common name, in keeping with Schwiebert, let's simply go with Western Cahill.

    IDENTIFICATIONS

    Order common name: Mayfly (Gary Knowels)
    Order taxonomic name: Ephemeroptera (Gary Knowels)
    Family common name: Flatheaded Mayflies (Travis Bille)
    Family taxonomic name: Heptageniidae (Gary Knowels)
    Genus common name: Western Cahill (Gary Knowels)
    Genus taxonomic name: Ecdyonurus (Gary Knowels)
    Lifestage: Nymph (Gary Knowels)