| Paraponera clavata | |
|---|---|
 | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Hymenoptera |
| Family: | Formicidae |
| Genus: | Paraponera |
| Species: | P. clavata |
| Binomial name | |
| Paraponera clavata | |
| Synonyms | |
Paraponera aculeata(Olivier, 1792) Contents | |
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.
The specific epithet of the ant, clavata, means "club-shaped". [2] The generic name, Paraponera, translates to "near- Ponera ". [3] Because of its fearsome reputation, the ant has several Native American, Spanish, and Portuguese local names in different geographical areas; perhaps the best-known of these is the Venezuelan nickname hormiga veinticuatro (the "24 ant" or "24-hour ant"), referring to the full day of pain that follows being stung; it can also refer to the time it takes to kill a human. [4] [5] [6] In Brazil, the Portuguese names given by locals include formiga cabo verde, formigão, or formigão-preto (big black ant); Native American–derived names include tocandira, and tocanquibira, from the Tupi–Guarani tuca-ndy, which translates to "the one wounding deeply". [6] Other names by which it is called include chacha, cumanagata, munuri, siámña, and yolosa. [7] In Costa Rica, P. clavata is known as bala, meaning "bullet". [8] P. clavata also has several common names; it is most commonly known as the bullet ant because of the extreme pain it delivers following a sting, similar to that of getting shot. [9] [10] Other names are the "lesser giant hunting ant" and "conga ant". [11]
Paraponera clavata was first described by Danish zoologist Johan Christian Fabricius in 1775, who named it Formica clavata in his Systema entomologiae. Fabricius listed the type locality as India, incorrectly, as these ants are only found in Central and South America. [12] In 1804, P. clavata was transferred to the genus Ponera by the French zoologist Pierre André Latreille. [13] The genus Paraponera was established by the British entomologist Frederick Smith in 1858, and P. clavata was designated as the type species by monotypy (the creation of a taxonomic group that includes only a single taxon). [14] In his book, Smith synonymised multiple taxa under Paraponera clavata, including Formica armata, Formica spininoda, Ponera tarsalis, and Ponera clavata. Later publications would also synonymise more taxa, including Formica aculeata and Formica clavata. [15] [16] The genus was placed in a monotypic tribe, the Paraponerini, in 1901 by the Italian entomologist Carlo Emery, who stressed the importance of certain morphological characteristics of Paraponera; Emery had also placed the tribe close to the Ectatommini. [17] This classification was accepted by the entomological community until 1958, when the American entomologist William Brown Jr. synonymised Paraponerini and transferred Paraponera to Ectatommini. [18] It was treated as a valid tribe in 1994, but in 2003, the English myrmecologist [ clarification needed ] elevated the rank of the tribe to subfamily level as Paraponerinae, part of the Poneromorph subfamilies. [19] [20]
Under the present classification, the bullet ant is a member of the genus Paraponera in the tribe Paraponerini, subfamily Paraponerinae. It is a member of the family Formicidae, belonging to the order Hymenoptera. [21] It was once the sole member of its own genus and tribe, until the extinct Paraponera dieteri was described in 1994 by the entomologist Cesare Baroni Urbani. [6] The ant, described from Dominican amber, existed during the Early Miocene 15 to 45 million years ago. P. dieteri can be distinguished from P. clavata by its much narrower head, length, pronotum width, petiole width, and other features. The good preservation of the fossil allowed comprehensive comparisons between the two species; the body sculpture of P. dieteri suggests that the genus as a whole exhibits a slow evolutionary rate. [6]
P. clavata is the only living species in its subfamily. Although P. dieteri was the first extinct relative of P. clavata to be described, another Paraponera fossil had been examined earlier in the 1980s. The fossil, which was from the Miocene, was found embedded in Dominican amber from Hispaniola; at the time of discovery, the ant was the largest fossil of its kind. It showed similar characteristics to P. clavata, although it was considerably smaller. The fossil also has biogeographic importance. As P. clavata is not found in the Greater Antilles, but rather in Central and South America, this suggests that moister tropical forests covered the island during the Tertiary period. This is further supported by the fact that P. clavata is a forest ant that forages on the ground and up into bushes and trees. [22]
Worker ants are 18–30 mm (0.7–1.2 in) long [23] and resemble stout, reddish-black wingless wasps. Paraponera is predatory, and like all primitive poneromorphs, does not display polymorphism in the worker caste; the queen ant is not much larger than the workers. [24] They are not aggressive ants but are vicious when defending the nest, when they produce a stridulating sound and sting with ferocity. [25]
Paraponera is distributed throughout Central and South America, commonly found in the wet Neotropical realm. These ants are found in Honduras, El Salvador, Nicaragua, Costa Rica and Panama from the north, and in Venezuela, Colombia, Ecuador, Peru, Bolivia, and Brazil from the south. [26] Colonies are found in lowland areas, at elevations ranging from sea level to 750 metres (2,461 ft). However, specimens have been collected at elevations of 1,500 metres (4,921 ft) in La Amistad International Park. [27]
Colonies consist of several hundred individuals and are usually situated at the bases of trees. Workers forage arboreally for small arthropods and nectar in the area directly above the nest, often as far as the upper canopy; little foraging occurs on the forest floor. Nectar, carried between the mandibles, is the most common food taken back to the nest by foragers. Two studies in Costa Rica and on Barro Colorado Island (BCI) found about four bullet ant nests per hectare of forest. On BCI, the nests were found under 70 species of trees, six species of shrubs, two species of lianas, and one species of palm. Nests were most common beneath the canopies of Faramea occidentalis and Trichilia tuberculata, but these trees are also the most abundant in the forest. Nests were present under Alseis blackiana, Tabernaemontana arborea , Virola sebifera , Guarea guidonia, and Oenocarpus mapora more frequently than would be expected from abundance of these tree species. The large number of nest plants suggests little active selection of nest sites by bullet ants. Small shrubs, however, are underused, probably because they do not provide access to the forest canopy. The study on BCI concluded that bullet ants may select trees with buttresses and extrafloral nectaries. [28]
The ant is a predator of Greta oto , the glasswing butterfly. This butterfly attempts to combat P. clavata by producing chemical extracts during the larval stage that are unpalatable to these ants.
The small (1.5- to 2.0-mm-long) phorid fly Apocephalus paraponerae is a parasite of injured workers of P. clavata, of which the supply is constant because frequent aggressive encounters occur between neighbouring ant colonies, resulting in maimed workers. The flies are able to parasitise healthy ants if the ants are artificially restrained, but healthy ants are agile and able to repel them. Both male and female flies are attracted by the scent of injured ants; the females lay eggs, as well as feeding, and the males feed and possibly mate with the females. The flies are attracted to a crushed ant within two to three minutes, and 10 or more flies may be attracted to each ant. Each ant can harbour 20 fly larvae. Carl Rettenmeyer observed P. clavata actively trying to attack A. paraponerae when they approached the entrance to their nest. [23] [29]
The bullet ant's sting currently ranks the highest of all insect stings on Justin O. Schmidt's informal sting pain index, at 4.0+. According to Schmidt, the pain is like "[w]alking over flaming charcoal with a three-inch nail embedded in your heel". [30] [31] Some victims compared the pain to that of being shot, hence the name of the insect. It is described as causing "waves of burning, throbbing, all-consuming pain that continues unabated for up to 24 hours". [4] Lymphadenopathy, edema, tachycardia, and fresh blood appearing in human victim feces are common symptoms from even a single sting. [25] Poneratoxin, a paralyzing neurotoxic peptide isolated from the venom, affects voltage-dependent sodium ion channels and blocks the synaptic transmission in the central nervous system. It is being investigated for possible medical applications. [10] [32]
The Sateré-Mawé people of Brazil use intentional bullet ant stings as part of their initiation rites to become warriors or leaders. [25] [33] The ants are first rendered unconscious by submersion in a natural sedative, and then 80 of them are woven into gloves (which resemble large oven mitts) made of vines or leaves, stingers facing inward. When the ants regain consciousness, an initiator repeatedly blows smoke at the ants, with the objective of making them agitated and aggressive. Once this is done, the initiate has the gloves put on his hands and keeps them on for 5 to 10 minutes or longer. Afterward, the boy's hand and part of his arm are temporarily paralyzed because of the ant venom, and he may shake uncontrollably for days. The only "protection" provided is a coating of charcoal on the hands, supposedly to confuse the ants and inhibit their stinging. To fully complete the initiation, a boy or man must go through the ordeal 20 times over the course of several months or even years. [34]
Most ants are capable of biting, stinging, and spraying irritant chemicals. However, only relatively few species can harm humans; among which some can cause significant injury or, in rare cases, death. Like wasps, individual ants are capable of stinging multiple times as they do not lose their stingers.
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.
Myrmecia is a genus of ants first established by Danish zoologist Johan Christian Fabricius in 1804. The genus is a member of the subfamily Myrmeciinae of the family Formicidae. Myrmecia is a large genus of ants, comprising at least 93 species that are found throughout Australia and its coastal islands, while a single species is only known from New Caledonia. One species has been introduced out of its natural distribution and was found in New Zealand in 1940, but the ant was last seen in 1981. These ants are commonly known as bull ants, bulldog ants or jack jumper ants, and are also associated with many other common names. They are characterized by their extreme aggressiveness, ferocity, and painful stings. Some species are known for the jumping behavior they exhibit when agitated.
Myrmeciinae is a subfamily of the Formicidae, ants once found worldwide but now restricted to Australia and New Caledonia. This subfamily is one of several ant subfamilies which possess gamergates, female worker ants which are able to mate and reproduce, thus sustaining the colony after the loss of the queen. The Myrmeciinae subfamily was formerly composed of only one genus, Myrmecia, but the subfamily was redescribed by Ward & Brady in 2003 to include two tribes and four genera. An additional three genera, one form genus, and 9 species were described in 2006 from the Early Eocene of Denmark, Canada, and Washington. Subsequently an additional fossil genus was moved from the family Rhopalosomatidae in 2018, and a new genus was described in 2021.
The Schmidt sting pain index is a pain scale rating the relative pain caused by different hymenopteran stings. It is mainly the work of Justin O. Schmidt, who was an entomologist at the Carl Hayden Bee Research Center in Arizona. Schmidt published a number of works on the subject, and claimed to have been stung by the majority of stinging Hymenoptera.
Myrmecia nigriceps, also known as the black-headed bull ant, is a species of ant endemic to Australia. A member of the genus Myrmecia in the subfamily Myrmeciinae, it was first described by Austrian entomologist Gustav Mayr in 1862. These ants are large, varying from 19 to 23 millimetres in length. However, colonies contain workers that are much smaller, usually half the size of normal workers. The queens are the largest while the males are the smallest, which can be easily identified due to their small mandibles.
The green-head ant is a species of ant that is endemic to Australia. It was described by British entomologist Frederick Smith in 1858 as a member of the genus Rhytidoponera in the subfamily Ectatomminae. These ants measure between 5 and 7 mm. The queens and workers look similar, differing only in size, with the males being the smallest. They are well known for their distinctive metallic appearance, which varies from green to purple or even reddish-violet. Among the most widespread of all insects in Australia, green-head ants are found in almost every Australian state, but are absent in Tasmania. They have also been introduced in New Zealand, where several populations have been established.
Prionomyrmex is an extinct genus of bulldog ants in the subfamily Myrmeciinae of the family Formicidae. It was first described by Gustav Mayr in 1868, after he collected a holotype worker of P. longiceps in Baltic amber. Three species are currently described, characterised by their long mandibles, slender bodies and large size. These ants are known from the Eocene and Late Oligocene, with fossil specimens only found around Europe. It is suggested that these ants preferred to live in jungles, with one species assumed to be an arboreal nesting species. These ants had a powerful stinger that was used to subdue prey. In 2000, it was suggested by Cesare Baroni Urbani that the living species Nothomyrmecia macrops and a species he described both belonged to Prionomyrmex, but this proposal has not been widely accepted by the entomological community. Instead, scientists still classify the two genera distinctive from each other, making Nothomyrmecia a valid genus.
Ochetellus glaber is a species of ant native to Australia. A member of the genus Ochetellus in the subfamily Dolichoderinae, it was described by Austrian entomologist Gustav Mayr in 1862. Aside from Australia, O. glaber has been introduced to a number of countries, including China, India, Japan, New Zealand, the Philippines and the United States, where it has established itself in Hawaii and Florida. It has been found on Lord Howe Island, New Caledonia, Norfolk Island, Réunion, New Zealand, and the Solomon Islands. Compared with other ants, O. glaber is a small species, with workers measuring 2–3 mm (0.079–0.118 in). Males are the smallest at 1.6 mm (0.063 in), while the queens measure 5.2–5.5 mm (0.20–0.22 in). The ant's colour ranges from brown to black.
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.
Brownimecia is an extinct genus of ants, the only genus in the tribe Brownimeciini and subfamily Brownimeciinae of the Formicidae. Fossils of the identified species, Brownimecia clavata and Brownimecia inconspicua, are known from the Middle Cretaceous to Late Cretaceous of North America. The genus is one of several ants described from Middle Cretaceous ambers of New Jersey. Brownimecia was initially placed in the subfamily Ponerinae, until it was transferred to its own subfamily in 2003; it can be distinguished from other ants due to its unusual sickle-like mandibles and other morphological features that makes this ant unique among the Formicidae. B. clavata is also small, measuring 3.43 millimetres (0.135 in), and a stinger is present in almost all of the specimens collected. The morphology of the mandibles suggest a high level of feeding specialization.
Gigantiops is a South American genus of jumping ants in the subfamily Formicinae. The genus contains the single species Gigantiops destructor, which is also the sole member of the tribe Gigantiopini. They have the largest eyes among all ants, are known for their ability to jump, and have the highest number of chromosomes of any member of the subfamily Formicinae (2n=78).
Paraponera is a genus of ants and the only genus in the subfamily Paraponerinae. The name means "near-Ponera".
Myrmecia pyriformis, also known as the bull ant or inch ant, is an Australian ant. Myrmecia pyriformis belongs to the genus Myrmecia. It is abundant in many major cities of Australia, but mostly spotted in the eastern states. The species is of a similar appearance to the Myrmecia forficata.
Apocephalus paraponerae is a species of fly in the family Phoridae discovered by Borgmeier in 1958. This species is a parasitoid of the giant tropical ant Paraponera clavata and uses both visual and chemical cues to locate its host. A. paraponerae can locate fighting or injured ants through host-produced alarm pheromones. Female flies are attracted to the ant to feed and oviposit, while males are attracted to feed and locate females for mating. There is some evidence that suggests that A. paraponerae is a cryptic species complex of at least four genetically distinct species.
Odontomachus hastatus is a species of ant from the complex Odontomachus hastatus, The species was originally described by Johan Christian Fabricius in 1804.
