Aquatic Insect #4 ID?

Discussion in 'Fly Fishing Entomology' started by Taxon, May 14, 2012.

  1. Taxon

    Taxon Moderator Staff Member

    [​IMG]

    This aquatic insect was collected in a kicknet sample five summers ago on the South Fork Snoqualmie River. It is 2.5 mm in body length. Can you identify it by any of the following:

    Order common name:
    Order taxonomic name:
    Family common name:
    Family taxonomic name:
    Genus taxonomic name:
    Species taxonomic name:
    Lifestage:
     
  2. jwg

    jwg Active Member

    Heteroptera

    Jay
     
  3. jwg

    jwg Active Member

    Revision

    Beetles
    Order Coleoptera

    Predaceous Diving Beetles
    Family Dytiscidae

    Genus
    Liodessus

    jay
     
  4. jwg

    jwg Active Member

    Adult

    Jay
     
  5. Taxon

    Taxon Moderator Staff Member

    Good job, Jay. Incidentally, its body length is 2.5 mm, which may lead you the correct genus and species.

    IDENTIFICATIONS

    Order common name: Beetle (jwg)
    Order taxonomic name: Coleoptera (jwg)
    Family common name: Predaceous Diving Beetle (jwg)
    Family taxonomic name: Dytiscidae (jwg)
    Genus taxonomic name:
    Species taxonomic name:
    Lifestage: Adult (jwg)
     
  6. jwg

    jwg Active Member

    Boreonectes

    jay
     
  7. Taxon

    Taxon Moderator Staff Member

    Hi Jay,

    Nice work, but no cigar. ;) Right Subfamily and Tribe, but wrong Genus.
     
  8. jwg

    jwg Active Member

    Heterosternuta

    Jay
     
  9. Taxon

    Taxon Moderator Staff Member

    No, but try comparing the following BugGuide taxonomy:

    Phylum Arthropoda - Arthropods​
    Class Insecta - Insects​
    Order Coleoptera - Beetles​
    Suborder Adephaga - Ground and Water Beetles​
    Family Dytiscidae - Predaceous Diving Beetles​
    Subfamily Hydroporinae
    Tribe Hydroporini
    Genus Boreonectes
    Genus Coelambus
    Genus Haedeoporus
    Genus Hydrocolus
    Genus Hydroporus
    Genus Hygrotus
    Genus Lioporeus
    Genus Nebrioporus
    Genus Neoporus
    Genus Oreodytes
    Genus Stictotarsus


     
  10. jwg

    jwg Active Member

    I wonder how many guesses I get

    Genus Stictotarsus

    Jay
     
  11. jwg

    jwg Active Member

    Revision:

    I just found the exact image copyright Roger Rohrbeck!

    Oreodytes - Oreodytes obesus
    S. Fork Snoqualmie River, King County, Washington, USA
    September 20, 2007
    Size: ~2 mm.
     
  12. Taxon

    Taxon Moderator Staff Member

    Hi Jay,

    Yes you did, but perhaps more importantly, you learned about the existence of a resource on my website, which can greatly simplify future searches. ;)

    IDENTIFICATIONS

    Order common name: Beetle (jwg)
    Order taxonomic name: Coleoptera (jwg)
    Family common name: Predaceous Diving Beetle (jwg)
    Family taxonomic name: Dytiscidae (jwg)
    Genus taxonomic name: Oreodytes (jwg)
    Species taxonomic name: obesus (jwg)
    Lifestage: Adult (jwg)