[DManA]

The common scientific belief has been that army ants originated separately on several continents over millions of years. Now it is found there was one evolution. Using fossil data and the tools of a genetics detective, a Cornell University entomologist has discovered that these ants come from the same ancestor, because since the reign of the dinosaurs, about 100 million years ago, army ants in essence have not changed a bit.

http://www.news.cornell.edu/releases/May03/ArmyAntBrady.bpf.html

[Stultis]

But they still aren't the same species, not even living army ants.