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Photo#772772
Protanyderus

Protanyderus
Omak, Okanagan County, Washington, USA
July 18, 2011
Size: 20 mm

Moved

ID?
How are larvae of the two North American genera distinguished? I have not seen any key that goes past family.

 
Good question.
In the table on p. 752, Aquatic Insects of North America, fourth edition, Protanyderus is listed as having a western distribution, and Protoplasa an eastern distribution. So basically, I'm assuming the genus ID based on a record of geographical distribution rather than morphology. Perhaps not solid enough for BugGuide.

 
Good enough
The species and genera do not seem to be widespread.

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