Key to US Gnamptogenys species
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Key to workers of Gnamptogenys species known from the United States.
- Body pale reddish brown; propodeum lacking spines; smaller, length 3.5-4 mm. Louisiana and Texas => Gnamptogenys hartmani
- Body dark reddish black; propodeum armed with small spines; larger, length approximately 5 mm. Alabama and Florida => Gnamptogenys triangularis