[Kaijo]

Yes, although the surprising thing here relates more to chimaerism than diploidy alone. And that should be "invade" and not "evade" in the crucial sentence in the closing paragraph: "crazy yellow ants’ chimaerism could contribute to the species ability to evade ecosystems".

The flexiblity afforded by chimaerism in this system reminds me a bit of the dikaryotic condition in many species of mushrooms (higher basidiomycete fungi). In this case the parental nuclei also do not fuse on fertilization (plasmogamy), but are maintained separately as a stable arrangement at a subcellular level. So you don't get individual cells having either one parental genome or the other, every cell is binucleate, having two parental genomes in two separate nuclei.