''Stygoporus oregonensis'' is a species of

beetle Beetles are insects that form the Taxonomic rank, order Coleoptera (), in the superorder Holometabola. Their front pair of wings are hardened into wing-cases, elytra, distinguishing them from most other insects. The Coleoptera, with about 40 ...

in the family

Dytiscidae The Dytiscidae, from the Ancient Greek word δυτικός (''dystikos''), meaning "able to dive", are the predaceous diving beetles, a family of water beetles. They occur in virtually any freshwater habitat around the world, but a few species l ...

, the only species in the genus ''Stygoporus''. They were first identified in an Oregon bathroom in 1984. Eight specimens were collected by

Oregon State University Oregon State University (OSU) is a Public university, public Land-grant university, land-grant research university in Corvallis, Oregon, United States. OSU offers more than 200 undergraduate degree programs and a variety of graduate and doctor ...

before the bathroom was bleached. There have been no reported specimens found until 2014 to 2016.

References

Dytiscidae Endemic fauna of Oregon Endemic insects of the United States {{Dytiscidae-stub