ATTA SEXDENS PDF

Latin Name: Atta sexdens. Trivialname: Leafcutterant. Taxonomy: Subfamily: Myrmicinae Tribe: Attini. Keeping Level: (3) through their large Space- and. Atta sexdens, along with A. cephalotes, is the most widespread member of its genus. Its northern most range is Mexico, and extends through Central America. Atta sexdens: leafcutter ant: cubic feet), a colony of A. sexdens leafcutters may turn over kg ( pounds) of soil in tropical moist forests, stimulating.

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Fowler and Robinson, ; Wilson and Holldobler, ; Wilson, Other Physical Ssexdens ectothermic heterothermic bilateral symmetry polymorphic venomous Sexual Dimorphism sexes shaped differently Average mass.

Soldiers usually appear when the colony has sexden population of aboutOne possible reason for this is, before the colony is established enough to sustain any large soldier-caste workers, it is useful to remain unnoticed.

The seasonally flooded forest was dominated by Vochysia divergens Pohl.

Thorax length 8, 5 mm. After the number of workers reaches 5—8 million, the colony stops expanding and diverts resources into producing queens and males.

In that time, the colony will have sent out numerous males and virgin queens to found new colonies. After three to four more weeks, the pupae hatch into adult workers. From late October to mid-December, the A. Head, thorax and pedicel thick and long woolly hair, the legs on the ventral side. Mated queens may contain more that million sperm when all the mating is done.

A shortage of one caste causes the workers to produce more ants of that caste. You must log in to access this functionality. Not once, but multiple times do the runners go from harvest site sexxdens nest in this fashion. As the local plants have not developed defensive compounds against leafcutters and Africa does not have parasites evolved to infect them, the results for both the ecosystem and agriculture would be disastrous. Scape 3, 4 mm.

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Connect with us Help us improve the site by taking our survey. Check data from AntWeb. The third caste, Forager-Excavators, find sexdenz sources, lay trails to them, cut and retrieve vegetation, and also excavate the nest, making new chambers or recovering old ones that may have collapsed.

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Atta sexdens – AntWiki

Behavioral Ecology and SociobiologyVol 7, Issue 2: Atta sexdenslike all hymenopterans are haplo-diploid, meaning males are haploid one of each chromosome and females are diploid a pair of each chromosome. At the end of its lifespan, an A. The first eggs to hatch are gardener-nurses, who take care of the fungus gardens. Polymorphism in a local population can be an adaptation to prevent density-dependent predation, where predators preferentially prey on the most common morph.

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Atta sexdens Linnaeus[1]. The queen is attq largest ant in the colony, often measuring an inch or longer. Hind tibiae 5 mm. The queen then starts a fungal garden using the piece brought from her birth colony. Petiole and blunt postpetiole side with teeth or cusps. In fact, Atta ants are considered the primary herbivorous pest in many areas where they are found. After there are enough gardener-nurses to take care of both brood and fungus, the queen becomes strictly an egg-laying machine for the rest of her life.

Sexdenz workers sometimes ride on the leaf pieces while the foragers carry them. Referring to a mating system in which a female mates with several males during one breeding season compare polygynous.

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Atta sexdens

In other projects Wikimedia Commons Wikispecies. More specifically refers to a group of organisms in which members act as specialized subunits a continuous, modular society – as in clonal organisms. The queen also lays a few eggs. It is known that they are a sexxens of the basidiomycete family Lepiotaceae. No known predator, except the mostly subterranean army ant Nomamyrmex esenbeckiiactively attacks the nests, and even other highly aggressive army ants show a healthy respect for an A.

Male sperm storage also occurs, as sperm are retained in the male epididymes in mammals for a period that can, in some cases, extend over several weeks or more, but here we use the term to refer only to sperm storage by females. Thoracic spines pointed, shorter than the front mesonotal spines epinotal spines. Front corners poorly secdens. The queen herself eats nothing attz this period, sustaining herself on fat deposits and her shrinking flight muscles.

By using this site, you agree to the Terms of Use and Sexddns Policy. Another distinguishing feature is a relatively large, two-lobed head.

ADW doesn’t cover all species in the world, nor does it include all the latest scientific information about organisms we describe. Queens agta produce up to million daughters during their lifetime.