Monomorium monomorium Bolton, 1987 in Spain (Hymenoptera: Formicidae)

Abstract

The presence of a population of Monomorium monomorium Bolton in a citrus orchard at the fluvial island of Gràcia (Tarragona, Spain) is reported, this being the second Iberian record for that very small shining black species. Soil nesting, polygyny and tending of honeydew producing insects was ascertained. We briefly discuss if this species should be considered as native or exotic in the Iberian Peninsula.