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Photo#566683
Dytiscidae: Graphoderus? - Graphoderus occidentalis
Copyright © 2011 Carl Barrentine

Dytiscidae: Graphoderus? - Graphoderus occidentalis
Grand Forks, Grand Forks County, North Dakota, USA
August 22, 2011
Size: Length ~ 1 cm
This specimen may belong in the genus Graphoderus. It seems to resemble this BG image of another specimen from western North Dakota (see image below), but I am not certain.



I'm guessing this individual is host to an external parasite? If so, are these some sort of aquatic mite? Thanks for looking! ;-)
Contributed by Carl Barrentine on 22 August, 2011 - 8:07am
Last updated 23 August, 2011 - 11:36pm

Genus is correct
this is G. occidentalis; the hitchhikers don't look like mites in the enlarged pic..probably some sort of freshwater crustacean (copepod?)
… Tim Loh, 23 August, 2011 - 11:36pm

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