Aquatic Insect #7 ID?

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

  1. Taxon

    Taxon Moderator Staff Member

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    [​IMG]

    This aquatic insect is mostly found in WA lakes. Can you identify it by any of the following?

    Lifestage:
    Order common name:
    Order taxonomic name:
    Family common name:
    Family taxonomic name:
    Genus taxonomic name:
     
  2. Travis Bille

    Travis Bille Active Member

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    Location:
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    Lifestage: Spinner
    Order: Ephemoroptera
    Family: Leptohyphidae
    Genus: Tricorythodes
     
  3. Taxon

    Taxon Moderator Staff Member

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    Hi Travis,

    Not a spinner; notice the non-wettable hairs (barely) visible on the trailing edge of its forewing. Neither family Leptohyphidae, nor genus Tricorythodes; close, but no cigar. ;)

    IDENTIFICATIONS

    Lifestage:
    Order common name:
    Order taxonomic name: Ephemeroptera (Travis Bille)
    Family common name:
    Family taxonomic name:
    Genus taxonomic name:
     
  4. jwg

    jwg Active Member

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    Location:
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    Lifestage: Dun
    Gender: female

    jay
     
  5. Taxon

    Taxon Moderator Staff Member

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    Hi Jay,

    Yes, I "believe" it to be a female dun.

    IDENTIFICATIONS

    Lifestage: subimago/dun (jwg)
    Order common name:
    Order taxonomic name: Ephemeroptera (Travis Bille)
    Family common name:
    Family taxonomic name:
    Genus taxonomic name:
    Gender: female (jwg)
     
  6. jwg

    jwg Active Member

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    I was thinking the small eyes might mean it was female, thinking that males often have much larger eyes than females. Is that sometimes the case?

    Jay
     
  7. Taxon

    Taxon Moderator Staff Member

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    Yes Jay, the female mayfly subimago and imago generally has smaller eyes than their male counterparts, and can be differentiated from them on that basis, particularly from a lateral view photo.
     
  8. Bob Newman

    Bob Newman Active Member

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    Genus Caenidae
     
  9. Taxon

    Taxon Moderator Staff Member

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    Hi Bob,

    Welcome aboard, and well done. However, Caenidae is actually the taxonomic name of the family, not the genus.;)

    IDENTIFICATIONS

    Lifestage: subimago/dun (jwg)
    Order common name: ???
    Order taxonomic name: Ephemeroptera (Travis Bille)
    Family common name: ???
    Family taxonomic name: Caenidae (Bob Newman)
    Genus taxonomic name: ???
    Gender: female (jwg)
     
  10. jwg

    jwg Active Member

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    Location:
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    Order common name - Mayflies
    Family common name - Small Squaregilled Mayflies
     
  11. Etamaman

    Etamaman Member

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    Genus taxonomic name: ???

    Ephemerella is my guess.
     
  12. Taxon

    Taxon Moderator Staff Member

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    Good cleanup, Jay.

    IDENTIFICATIONS

    Lifestage: subimago/dun (jwg)
    Order common name: Mayflies (jwg)
    Order taxonomic name: Ephemeroptera (Travis Bille)
    Family common name: Small Squaregill Mayflies (jwg)
    Family taxonomic name: Caenidae (Bob Newman)
    Genus taxonomic name: ???
    Gender: female (jwg)
     
  13. Taxon

    Taxon Moderator Staff Member

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    Welcome aboard, Etamaman. Although this mayfly does have three tails in its dun and spinner lifestages, a trait it does shares with Ephemerrelids (members of family Ephemerellidae), if you look a the wings, you will notice that this mayfly doesn't have hind wings, and all Ephemerellids (including genus Ephemerella) do have hind wings.
     
  14. jwg

    jwg Active Member

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    Location:
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    Genus taxonomic name: Caenis

    common name: Whitewinged Sulphur

    great challenge.

    Jay
     
  15. Taxon

    Taxon Moderator Staff Member

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    Good job, Jay.

    IDENTIFICATIONS

    Lifestage: subimago/dun (jwg)
    Order common name: Mayflies (jwg)
    Order taxonomic name: Ephemeroptera (Travis Bille)
    Family common name: Small Squaregill Mayflies (jwg)
    Family taxonomic name: Caenidae (Bob Newman)
    Genus common name: Whitewinged Sulphur (jwg)
    Genus taxonomic name: Caenis (jwg)
    Gender: female (jwg)