Aquatic Insect #4 ID?

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:

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)

Hi Jay,

Nice work, but no cigar. Right Subfamily and Tribe, but wrong Genus.

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 Heterosternuta

Genus Hydrocolus

Genus Hydroporus

Genus Hygrotus

Genus Lioporeus

Genus Nebrioporus

Genus Neoporus

Genus Oreodytes

Genus Sanfilippodytes

Genus Stictotarsus

to WA Stream-Resident Macroinvertebrates

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)