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Head of a red imported fire ant queen, Solenopsis invicta, with mandibles removed to show the 3 clypeal teeth diagnostic for this species.

Head of a red imported fire ant queen with mandibles removed to show the 3 clypeal teeth diagnostic for this species. The native fire ant, Solenopsis xyloni, only has the two lateral teeth. These characters can be seen with the mandibles intact if you know what to look for. Credit: Les Greenberg
Credit: Les Greenberg
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