Atta laevigata?

Description:

A large species of leaf-cutter ant. This individual was well over 3cm long. I think this is a large flightless female but am not certain as there seems to very little information available. If anyone has any clues I would be grateful to hear about them.

Notes:

A local man told me this is an edible ant so thinking probably what they call 'Hormigas Culonas' or 'large-bottomed ant'. It was found around rice fields Andean lowlands.