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Levee structures surrounding nest entrances of five distantly related ant species: a Pheidole cf. obscurithorax (Myrmicinae), b Acromyrmex landolti (Myrmicinae), c Dorymyrmex thorasicus (Dolichoderinae), d Ectatomma opaciventre (Ectatomminae), and e Pheidole jelseki (Myrmicinae)
