They are all Related

Introduction

Researchers from Japan and the US have compared gene sequences from 300 species of ants and found that one-tenth of all ants belong to just one genus, Pheidole. The researchers used these sequences to construct a tree that shows when and where each species evolved into new species. At the same time, they scoured the academic literature, museums around the world, and large databases to aggregate data on where all 1,200 or so Pheidole species live on Earth, creating a range map for each species. Their results suggest that Pheidoles evolved the same way twice, once to take over the New World, and then again to take over the Old World. 

Source

Down To Earth, January 2015