Word: iridomyrmex
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...holds of freighters from South American ports that put into Genoa about 13 years ago were some unlisted travelers -small tropical ants named Iridomyrmex humilis. Spreading rapidly from their beachhead, the tiny invaders took on the heftiest ants of Italy, annihilated them by the colony. Putting them under the microscope, University of Pavia's Zoologist Mario Pavan got to their secret: a sac of grey, waxy poison in the anal gland...
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