Temnothorax rugatulus is a species of ant in the genus Temnothorax. It is found in North America. More specifically, it is found in the forests of the western United States. Colonies are either monogynous (with single reproductive queen) or polygynous (multiple queens). Queens in monogynous colonies are generally larger (macrogynes), about twice the size of conspecific workers; polygynous colonies have smaller queens (microgynes), typically slightly smaller than the workers. T. rugatulus ants are a subdominant ant group.

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