Pheidole (1)
Postpetiole with a conspicuous lobe at its lower face	Postpetiole without lobe at its lower face
megacephala (*)	teneriffana, pallidula

(*) Although profusely cited in the beginning of the last century, P. megacephala has not been cited in the Iberian Peninsula for the last 50 years, and the historical records that could have been revised have resulted missidentifications. We include this species in the keys as, althogh probably not present in the Iberian Peninsula, its behaviour as an exotic species can make possible a future presece.