Cardiocondyla obscurior Wheeler, 1929 (Hymenoptera: Formicidae) in Catalonia (NE Spain), with comments on exòtic ant species

The polygynous exotic ant Cardiocondyla obscurior Wheeler, 1929 was detected nesting in dead wood of shrubs at a public garden in
urban Barcelona. Not all plant species were equally occupied by foraging workers. Viburnum sp. was preferentially used as foraging space.
At present, fourteen exotic ant species are known from Catalonia. Only two (the Argentine ant, Linepithema humile Mayr, 1868 and the
invasive garden ant, Lasius neglectus Van Loon, Boomsma & Andrásfalvy, 1990) are of major concern.