Figure 1. Nest and fungus garden of Mycetagroicus cerradensis. (A) Entrance of nest TRS080923-01 in cerrado sensu stricto (ruler is 15 cm long). (B) Sketch of cross section through a nest of Mycetagroicus cerradensis, showing the approximate relative locations of the entrance mound, tunnels, empty chambers, and fungus garden chamber (note that this drawing is not to scale; actual depth to top of fungus garden chamber is 354 cm). (C) Mycetagroicus cerradensis workers tending their fungal garden. (D) A piece of fungal garden several days after excavation (arrow shows white mycelial swellings; see text for details). (E) Mycetagroicus cerradensis fungal cultivar hyphae under 100x magnification. (F) Cultivar of Atta cephalotes (stained with cotton-blue) with swollen hyphae (gongylidia) typical of higher attine (“G1”) cultivars. Photo credits: A, C by S. Solomon; D, E by A. Rodrigues; F by U. Mueller. Drawing B by Karolyn Darrow.