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Photo#1786294
Acromyrmex versicolor? - Acromyrmex versicolor

Acromyrmex versicolor? - Acromyrmex versicolor
Cabeza Prieta National Wildlife Refuge, Yuma County, Arizona, USA
March 7, 2020
Coordinates: 32.099369, -113.477883
Elevation: 736 ft
At approximately 9:00 PM, Dr. Andrew Johnston showed me the entrance of an active ant nest that had a few workers moving slowly; probably due to the low temperatures. I took a few specimens for photos. The nest was close to our campground near "El Camino de Diablo" dirt road

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Acromyrmex versicolor? - Acromyrmex versicolor Acromyrmex versicolor? - Acromyrmex versicolor Acromyrmex versicolor? - Acromyrmex versicolor Acromyrmex versicolor? - Acromyrmex versicolor Acromyrmex versicolor? - Acromyrmex versicolor Acromyrmex versicolor? - Acromyrmex versicolor Acromyrmex versicolor? - Acromyrmex versicolor Acromyrmex versicolor? - Acromyrmex versicolor Nest entrance of Acromyrmex versicolor? - Acromyrmex versicolor Nest entrance of Acromyrmex versicolor? - Acromyrmex versicolor Acromyrmex versicolor? - Acromyrmex versicolor Acromyrmex versicolor? - Acromyrmex versicolor

Acromyrmex!
Nothing else quite like it in the states! Well not really - a few of the larger Trachymyrmex can look confusingly similar, but don't build such large nest entrances. Acromyrmex also has a more heart shaped triangular head and three pairs of well developed spines on the pronotum (instead of bristly humps like in the larger Trachymyrmex).

Moved from Ants.

 
Wonderful!
Thank you Steven for the confirmation and diagnostic remarks.

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