A Pseudomyrmex spinicola acacia ant pauses outside the nest entrance. The ants cut a circular entrance hole to gain access to the inside of the hollow thorn. Chiriqui, Panama.

Pseudomyrmex spinicolaPseudomyrmaPseudomyrmexPseudomyrmecinaeformicidaeant plantants and plantsecologymutualismcoevolutionadaptationevolutionAcaciatropical ecologyinsectsinsectswollen thorn acaciabotanyscience