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Leafcutter ants are any of at least 55 species [1] [2] [3] of leaf-chewing ants belonging to the three genera Atta, Acromyrmex, and Amoimyrmex, within the tribe Attini. [4] These species of tropical, fungus-growing ants are all endemic to South and Central America, Mexico, and parts of the southern United States. [5]
Town ant, parasol ant, fungus ant, Texas leafcutter ant, cut ant, night ant Texas, Louisiana, northeastern states of Mexico Atta vollenweideri: Acromyrmex ameliae: southern Brazil Acromyrmex ambiguus: Quenquém-preto-brilhante: Brazil, Paraguay, Uruguay: Acromyrmex aspersus: Quenquém-rajada : southern Brazil and Peru: Acromyrmex balzani
Acromyrmex versicolor is known as the desert leafcutter ant. A. versicolor is found during the summer months in the Colorado and Sonoran deserts when there is precipitation. They form large, distinctive nest craters that are covered with leaf fragments. Living and dead leaves are collected by workers and used to cultivate fungus gardens. [2]
Ant–fungus mutualism is a symbiosis seen between certain ant and fungal species, in which ants actively cultivate fungus much like humans farm crops as a food source. There is only evidence of two instances in which this form of agriculture evolved in ants resulting in a dependence on fungi for food.
The ants actively cultivate their fungus on a medium of masticated leaf tissue. This is the sole food of the queen and other colony members that remain in the nest. The mediae also gain subsistence from plant sap they ingest whilst physically cutting out sections of leaf from a variety of plants.
The number of ants that are recruited to cut varies greatly based on the leaf quality available in addition to the species and location of the colony. Leaf quality is complex to measure because many variables exist, including "leaf tenderness, nutrient composition, and the presence and quantity of secondary plant chemicals" such as sugar.
Amoimyrmex striatus is a species of leafcutter ant found in the Neotropics. [2]It is a member of the subfamily Myrmicinae, and within the tribe Attini.As an attine, A. striatus forages for vegetation that will be applied to the fungal garden, typical in all leaf-cutting species. [3]
Atta mexicana is a species of leaf-cutter ant, a New World ant of the subfamily Myrmicinae of the genus Atta. This species is from one of the two genera of advanced attines (fungus-growing ants) within the tribe Attini .