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Photo#501770
Zootermopsis angusticollis? - Zootermopsis

Zootermopsis angusticollis? - Zootermopsis
Sacremento, Sacramento County, California, USA
March 27, 2011
Easily the largest termites I've ever seen. Found them inside of a large rotting tree that was fallen near a trail that runs along a river. This shot shows some of everything.

Moved
It is certainly one of those two species, but it is very hard to tell without examining microscopic features of the workers' mandibles. Other characters are less relaible, and typically you need to look at a series of specimens before you feel comfortable making a definitive identification.

Moved from Isoptera (Termites).

Moved for expert attention
Moved from ID Request.

Seems to me that Z. nevadensis could also be a possibility. With luck, one of the experts will be able to say for sure.

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