| Dinoponera gigantea | |
|---|---|
 | |
| Dinoponera gigantea. Museum specimen | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Hymenoptera |
| Family: | Formicidae |
| Genus: | Dinoponera |
| Species: | D. gigantea |
| Binomial name | |
| Dinoponera gigantea | |
| Synonyms | |
Ponera grandisGuérin-Méneville, 1838 [2] Contents | |
Dinoponera gigantea is a species of ant belonging to the family Formicidae.
It is called taramãçu or uitsi in the Kwaza language of Rondônia, Brazil. [3]
Dinoponera gigantea is one of the world's largest species of ant. [4] The females of the species are larger than males, with lengths ranging from 3 to 4 centimetres (1.2 to 1.6 in). [5] The females are coal-black in color, while the much smaller males are dark red.[ citation needed ]
Dinoponera gigantea is present only in South America. It has been found on the coast of Guyana, in the Brazilian states of Amazonas, Pará including Marajo Island, Mato Grosso, Mato Grosso do Sul and Maranhão as well as the Loreto Province in Peru. Dinoponera gigantea is reported to be common in un-flooded forests in the vicinity of Belém, Pará. It is probable that Dinoponera gigantea is found in French Guiana, Suriname, Venezuela and southeastern Colombia because these regions are adjacent to known Dinoponera gigantea localities and have similar lowland rainforest habitat. [6]
D. gigantea colonies have as many as eight entrances to their underground chambers, each being 3 to 8 centimetres (1.2 to 3.1 in) in diameter. The entrances are, as is typical for ants, surrounded by the soil removed to make the nest, but, in contrast with other species, no mound is formed. Nests have been found to be about 40 centimetres (16 in) deep, with chambers approximately 3 centimetres (1.2 in) in height and 20 centimetres (7.9 in) in width. [7]
At least in some instances, the species is polydomous, with a single colony occupying and maintaining more than one nest at a time. Some instances of this were recorded in Fourcassie and Oliveira's 2002 study, which found colonies using multiple nests, the entrances of which were 40 to 250 centimetres (1.3 to 8.2 ft) apart. [7] [8]
Activity outside the nest is highest at sunrise and sunset, though it is likely that some activity occurs at night. Individuals search for food alone, generally within about 10 metres (33 ft) of the nest. Items brought back range from 10 to 400 milligrams, and are of wide variety, including both plant and animal matter. Food items include fruits of vismia plants, inga seeds, and various small animals such as spiders, crickets, and snails. A relatively small number, around 10%, of foraging trips turn out to be successful. Successful foraging trips are typically thirty to sixty minutes in duration, but may run as long as three hours. [8]
Neighboring colonies of D. gigantea have distinct foraging areas. On the occasion that ants from different colonies meet on the border of these areas, the individuals face each other, locking their mandibles. The two then repeatedly poke each other's head with their antennae while kicking with the forelegs. At some point, one of the ants gains a dominant position, eventually biting the other on the top of the head and pressing the gaster against the loser's body. The entire encounter can last up to half an hour. In Fourcassie and Oliveira's study, both ants were invariably found to be uninjured. [8]
Ants are eusocial insects of the family Formicidae and, along with the related wasps and bees, belong to the order Hymenoptera. Ants evolved from vespoid wasp ancestors in the Cretaceous period. More than 13,800 of an estimated total of 22,000 species have been classified. They are easily identified by their geniculate (elbowed) antennae and the distinctive node-like structure that forms their slender waists.
Paraponera clavata, commonly known as the bullet ant, is a species of ant named for its extremely painful sting. It inhabits humid lowland rainforests in Central and South America.
Ponerinae, the ponerine ants, is a subfamily of ants in the Poneromorph subfamilies group, with about 1,600 species in 47 extant genera, including Dinoponera gigantea - one of the world's largest species of ant. Mated workers have replaced the queen as the functional egg-layers in several species of ponerine ants. In such queenless species, the reproductive status of workers can only be determined through ovarian dissections.
Dinomyrmex is a monotypic genus of ant containing the species Dinomyrmex gigas or giant forest ant. D. gigas is a large species of ant, native to Southeast Asian forests. It is one of the largest ants in existence, measuring in at 20.9 mm (0.82 in) for normal workers, and 28.1 mm (1.11 in) for the soldiers. Honeydew makes up 90% of their diet, but they will also consume insects and bird droppings. The ant is an effective forager, utilizing both efficient communication and recruitment. A handful of these ants may meet at night to engage in what has been observed to be ritual battle. These fights can continue for several months.
Nothomyrmecia, also known as the dinosaur ant or dawn ant, is an extremely rare genus of ants consisting of a single species, Nothomyrmecia macrops. These ants live in South Australia, nesting in old-growth mallee woodland and Eucalyptus woodland. The full distribution of Nothomyrmecia has never been assessed, and it is unknown how widespread the species truly is; its potential range may be wider if it does favour old-growth mallee woodland. Possible threats to its survival include habitat destruction and climate change. Nothomyrmecia is most active when it is cold because workers encounter fewer competitors and predators such as Camponotus and Iridomyrmex, and it also increases hunting success. Thus, the increase of temperature may prevent them from foraging and very few areas would be suitable for the ant to live in. As a result, the IUCN lists the ant as Critically Endangered.
The meat ant, also known as the gravel ant or southern meat ant, is a species of ant endemic to Australia. A member of the genus Iridomyrmex in the subfamily Dolichoderinae, it was described by British entomologist Frederick Smith in 1858. The meat ant is associated with many common names due to its appearance, nest-building behaviour and abundance, of which its specific name, purpureus, refers to its coloured appearance. It is among the best-known species of ant found throughout Australia; it occurs in almost all states and territories except for Tasmania. Its enormous distribution, aggression and ecological importance have made this ant a dominant species.
Cephalotes atratus is a species of arboreal ant in the genus Cephalotes, a genus characterized by its odd shaped head. These ants are known as gliding ants because of their ability to "parachute" by steering their fall if they lose their footing.
Pogonomyrmex occidentalis, or the western harvester ant, is a species of ant that inhabits the deserts and arid grasslands of the American West at or below 6,300 feet (1,900 m). Like other harvester ants in the genus Pogonomyrmex, it is so called because of its habit of collecting edible seeds and other food items. The specific epithet "occidentalis", meaning "of the west", refers to the fact that it is characteristic of the interior of the Western United States; its mounds of gravel, surrounded by areas denuded of plant life, are a conspicuous feature of rangeland. When numerous, they may cause such loss of grazing plants and seeds, as to constitute both a severe ecological and economic burden. They have a painful and venomous sting.
Dinoponera australis is a species of ant notable for its lack of distinct queen caste.
A gamergate is a mated worker ant that can reproduce sexually, i.e., lay fertilized eggs that will develop as females. In the vast majority of ant species, workers are sterile and gamergates are restricted to taxa where the workers have a functional sperm reservoir ('spermatheca'). In some species, gamergates reproduce in addition to winged queens, while in other species the queen caste has been completely replaced by gamergates. In gamergate species, all workers in a colony have similar reproductive potentials, but as a result of physical interactions, a dominance hierarchy is formed and only one or a few top-ranking workers can mate and produce eggs. Subsequently, however, aggression is no longer needed as gamergates secrete chemical signals that inform the other workers of their reproductive status in the colony.
Dinoponera is a strictly South American genus of ant in the subfamily Ponerinae, commonly called tocandiras or giant Amazonian ants. These ants are generally less well known than Paraponera clavata, the bullet ant, yet Dinoponera females may surpass 3–4 cm (1.2–1.6 in) in total body length, making them among the largest ants in the world.
Blepharidatta is a rare Neotropical genus of ants in the subfamily Myrmicinae. The genus, formed by predatory species whose small colonies nest in soil or leaf-litter, has up to seven species, but most of them are waiting for a formal taxonomic treatment or confirmation.
Dinoponera mutica is a queenless species of ants in the subfamily Ponerinae.
Dinoponera quadriceps is a queenless species of ants in the subfamily Ponerinae. The species, known from Brazil, is similar to Dinoponera mutica and uses venom for subduing large live prey and defense. Its venom could be of use to the pharmaceutical industry.
Dinoponera snellingi is a queenless species of ants in the subfamily Ponerinae. The species is known only from type locality in Campo Grande, Brazil.
Dinoponera longipes is a queenless species of ants in the subfamily Ponerinae.
Dinoponera hispida is a queenless species of ants in the subfamily Ponerinae. The species is known only from the type locality in Tucuruí, Pará, Brazil.
Dinoponera lucida is a large queenless species of ant in the subfamily Ponerinae. The species, endemic to Brazil, is threatened by habitat destruction. Workers range from 27 to 30 mm in body length, which is slightly larger than the related species Dinoponera australis, but smaller than other large ants. Males are unknown.
Archiponera is an extinct genus of ant in the formicid subfamily Ponerinae. The genus contains a single described species, Archiponera wheeleri known from several Late Eocene fossils which were found in North America.
Bombus transversalis is a bumblebee specifically native to the Amazon Basin. It is most notable for its surface level colonies which are built by the workers on the rainforest floor. Unlike its relatives, B. transversalis is able to thrive in a humid climate and fend off a wide range of predators because of its resilient nests. While there is great deal of information pertaining to their nests and foraging abilities, there is much more to be learned about relationships within the colony and life cycle of the bee.
This article incorporates text from a scholarly publication published under a copyright license that allows anyone to reuse, revise, remix and redistribute the materials in any form for any purpose: Lenhart, P.; Dash, S. T.; MacKay, W. P. (2013), "A revision of the giant Amazonian ants of the genus Dinoponera (Hymenoptera, Formicidae)" (PDF), Journal of Hymenoptera Research, 31: 119–164, doi: 10.3897/JHR.31.4335 Please check the source for the exact licensing terms.