This is in fact Dischidia vidalii. pectinoides is a synonym. I have a number of Dischidias species and only a few develop these types of bullate leaves. Dischidia major is another. I've been growing then for 10 years and never had an ant take up housekeeping. This are not native to Central or South America but the South Pacific islands such as Indonesia, Phillipines, Australia, Malaysia, etc.