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|of Atta cephalotes: Emery, 1913bb: 258.|
Guatemala to Colombia.
Atta colombica can be locally abundant in Costa Rica but does not have the ubiquity of A. cephalotes. It is common in the southern Pacific lowlands and I have also found it to be common around Volcan Arenal. I have not found it in other parts of Costa Rica where I have collected. Around Sirena in Corcovado National Park both A. colombica and A. cephalotes were abundant when I worked there in the early 1980's.
Atta colombica has conspicuous refuse dumps on the surface, where spent fungus substrate is deposited. These are often large conical mounds off to the side of the main soil mounds. Lines of workers can be seen carrying grayish white pellets from the nest and dropping them from a single high point, such that a regular conical mound forms below. This is in contrast to the behavior of A. cephalotes, which has subterranean refuse dumps.
The spelling of the name as "columbica" in Bolton's catalog is an error (Bolton, pers. com.).
Found most commonly in these habitats: 3 times found in tropical rainforest, some big trees, 1 times found in road edge in wet forest, 1 times found in farm, 1 times found in rainforest.
Found most commonly in these microhabitats: 3 times at bait, 1 times nest in soil, 1 times under rock, 1 times ground forager(s), 1 times There have been heavy rains recently, and there must have been an Atta flight., 1 times Tayrona National Park. Dry forest. Strays., 1 times St. 49, Atta battles. A column of A. colombica crossed the trail at st. 49, an, 1 times Secondgrowth forest edge and pasture (just below Tabacón hot springs). Strays on, 1 times OTS field project, Calathea lutea ant fauna, 1 times on mango, 1 times banana plantation, ...
Collected most commonly using these methods: 4 times search, 3 times baiting, 0 times roadside, 1 times hand collecting, 0 times in bush, 0 times forest floor trail.
Elevations: collected from 10 - 950 meters, 195 meters average