15 Records

"Cosmopolitan, but particularly diverse in the tropics; in the New World, n. US to Argentina. ... This is probably the largest genus of ants in the world, possibly rivaled only by Camponotus, both with an unknown number, but easily over 1000 species. They have pronounced worker caste dimorphism, especially in seed harvesting species; major workers are larger than minors and have disproportionately large heads. A few species have an even larger supermajor caste, and are thus trimorphic. Scavenger predators are usually less strongly dimorphic, and longer legged than the seed harvesters" (BugGuide).