Aquatic Insect #13

Discussion in 'Fly Fishing Entomology' started by Taxon, Sep 20, 2012.

  1. Taxon

    Taxon Moderator Staff Member

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    [​IMG]This aquatic insect was captured late yesterday afternoon. It was pretty much expired, but floating on the water's surface, perhaps 15 feet from shore, alongside a fishing pier on Lake Washington. It was 8 mm as measured from the front of its head to the end of its wings. Can you identify it by any of the following:

    Order common name:
    Order taxonomic name:
    Family common name:
    Family taxonomic name:
    Genus common name:
    Lifestage:
     
  2. zen leecher aka bill w

    zen leecher aka bill w born to work, forced to fish

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    It's a caddis for starters.
     
  3. Taxon

    Taxon Moderator Staff Member

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    Hi zen leecher aka bill w-
    Yes, that it is.

    IDENTIFICATIONS

    Order common name: Caddisfly (zen leecher aka bill w)
    Order taxonomic name: ???
    Family common name: ???
    Family taxonomic name: ???
    Genus common name: ???
    Lifestage: ???
     
  4. zen leecher aka bill w

    zen leecher aka bill w born to work, forced to fish

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    pupa. And that's about it for me.
     
  5. Taxon

    Taxon Moderator Staff Member

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    It is not a pupa.
     
  6. McNasty

    McNasty Canyon Lurker

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    has to be an adult
     
  7. Taxon

    Taxon Moderator Staff Member

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    McNasty-
    Yes, it's an adult.

    Order common name: Caddisfly (zen leecher aka bill w)
    Order taxonomic name: ???
    Family common name: ???
    Family taxonomic name: ???
    Genus common name: ???
    Lifestage: Adult (McNasty)
     
  8. plecoptera419

    plecoptera419 Active Member

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    Order: Tricoptera

    As to the rest, is it possible we can get a clearer photo? How long are the antenna as compared to the wings? I have a couple of good guesses, but I cant quite make out how many spurs I am seeing on the front and middle tibia.
     
  9. Taxon

    Taxon Moderator Staff Member

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    Hi plecoptera419-

    I will take and post a photo if the fore and middle legs when I have time later today. As to the antennae, they were accidentally broken off a bit beyond where I cropped the photo, probably in the process of collecting. However, the would have been at least 2 1/2 times the length of the wings.
     
  10. plecoptera419

    plecoptera419 Active Member

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    I like this game. Post pics. Please. I can guess and be wrong or...
     
  11. Taxon

    Taxon Moderator Staff Member

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    Hi plecoptera419-

    [​IMG]

    [​IMG]

    Well, it turns out that dissecting something so small under my stereo microscope without proper tools is a bit more difficult than anticipated. In any event, these are photos of what I believe to be a fore leg, and what I believe to be either a middle leg or a hind leg.
     
  12. plecoptera419

    plecoptera419 Active Member

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  13. Taxon

    Taxon Moderator Staff Member

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    Hi plecoptera419-

    Good job. Leptoceridae is correct. The next step should somewhat easier.
    Hint: focus on the forewing marking.

    Order common name: Caddisfly (zen leecher aka bill w)
    Order taxonomic name: ???
    Family common name: ???
    Family taxonomic name: Leptoceridae (plecoptera419)
    Genus common name: ???
    Genus taxonomic name: ???
    Lifestage: Adult (McNasty)
     
  14. plecoptera419

    plecoptera419 Active Member

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    Ok so based on the forewing marking and further research,

    Genus common name: ??? Long Horned Sedges
    Genus taxonomic name: ??? Oecetis

    I am also thinking this is most likely Oecitis Avara
     
  15. Taxon

    Taxon Moderator Staff Member

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    Excellent work, plecoptera419. I also believe the genus to be Oecetis, and although I also concluded that O. ariva was likely, identifying caddisflies to species from a photo is tends to be speculative at best.

    IDENTIFICATIONS

    Order common name: Caddisfly (zen leecher aka bill w)
    Order taxonomic name: Trichoptera (Taxon)
    Family common name: Longhorned Casemaker (Taxon)
    Family taxonomic name: Leptoceridae (plecoptera419)
    Genus common name: Longhorned Sedge (plecoptera419)
    Genus taxonomic name: Oecetis (plecoptera419)
    Species: (likely) avara (plecoptera419)
    Lifestage: Adult (McNasty)
    Sex: Female (Taxon)