Acromyrmex echinatior is a species of New World ants of the subfamily Myrmicinae of the genus Acromyrmex. It is found in the wild naturally from Mexico to Panama.In Costa Rica this species prefers open dry habitats such as urban areas around San Jose and seasonally dry habitats of Guanacaste Province. There is evidence to suggest that this species nests may occasionally be arboreal.Queens multiply mate, and colonies are facultatively polygynous.