The intricate galleries in this underground nest of Lasius aphidicolus are made possible by a fungus that grows within a matrix of wood pulp sculpted by the ants. Vermilion River Observatory, Illinois, USA

cartonant fungusmutualismcoevolutionant architecturebiologyscienceevolutioncarton nestLasiusCthonolasiusLasius umbratusant colonyant nestfungiecologyformicidaeformicinaeantsinsectsnestssuperorganism