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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
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 scale of the farming done by fungus-farming ants can be compared to human's industrialized farming. [5] [11] [78] [79] A colony can "[defoliate] a mature eucalyptus tree overnight". [33] The cutting of leaves to grow fungus to feed millions of ants per colony has a large ecological impact in the subtropical areas in which they reside. [7]
Atta cephalotes is a species of leafcutter ant in the tribe Attini (the fungus-growing ants). A single colony of ants can contain up to 5 million members, and each colony has one queen that can live more than 20 years. The colony comprises different castes, known as "task partitioning", and each caste has a different job to do. [2]
This genus describes a parasitic fungus capable of horizontally transmitting between colonies, which can affect any of the 47 species of ants commonly known as the leafcutter ants, which are widespread in parts of the Americas. The fungus transmits itself between colonies by utilizing infected external material. [7]
These leaf-cutting ants and fungus survive in an ant–fungus mutualism [6] - an obligate symbiosis - in which neither can exist without the other. Ants grow the fungus - the basidiomycete cultivar - propagating it, nurturing and defending it - the fungus becomes almost their sole source of food. [7]
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 .