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Extrafloral nectaries of different plants (left) and visiting ants (right). (A) Prunus avium, Crematogaster scutellaris; (B) Vicia sativa, Lasius emarginatus; (C) Pteridium aquilinum, Temnothorax parvulus; (D) Acacia dealbata, Camponotus truncatus (pictures by D. Giannetti and D.A. Grasso, Myrmecology Lab, University of Parma).
