In 1966 E.O. Wilson and his colleagues identified the fossil remains of an ant ("Sphecomyrma freyi") from the Cretaceous period. The specimen, trapped in amber dating back to more than 80 million years ago, has features of both ants and wasps. "Sphecomyrma" was probably a ground forager but some suggest that primitive ants were likely to have been predators underneath the surface of the soil.