| Acropyga exsanguis | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Hymenoptera |
| Family: | Formicidae |
| Subfamily: | Formicinae |
| Genus: | Acropyga |
| Species: | A. exsanguis |
| Binomial name | |
| Acropyga exsanguis (W. M. Wheeler, 1909) | |
| Synonyms [1] | |
| |
Acropyga exsanguis is a species of ant in the subfamily Formicinae. It lives in underground nests in Mexico, Central and South America. [1]
Over 450 ant species have been collected at La Selva Biological Station in Costa Rica, [2] including several species of Acropyga . These are small, stocky ants less than 3.5 mm (0.14 in) long, and A. exsanguis is not easy to distinguish from related species. The dorsal surface is rather more densely covered in short hairs than is the case with Acropyga keira , another species found at La Selva. [3]
This neotropical ant is known from Mexico, Guatemala, El Salvador, Honduras, Nicaragua, Costa Rica, Panama, Colombia, Venezuela and Argentina. It occurs at altitudes up to about 1,660 m (5,400 ft), typical habitats including wet or moist lowland rainforest, mesophyll forest and montane wet forest. It lives in colonies underground and this subterranean existence means it is poorly represented in ant surveys; it has been found most often by sifting through leaf litter, but has occasionally been observed under stones or visiting bait. The fact that it is much more common than might be expected from survey results is shown by the vast swarms of males that were seen twice in 1991 at La Selva Biological Station during the wet season. [3]
This ant lives underground in a large, diffuse nest. The ants move the nest upwards and downwards according to the conditions of the soil, descending deeper when the ground becomes dry. The nests have multiple queens, either because they were founded by several newly-mated reproductives, or because they have recruited further queens since their foundation. [4]
This ant lives in symbiosis with several species of mealybug which live in its nest; the mealybugs suck sap from roots, and the ants feed on the honeydew that the mealybugs secrete. Species of mealybug found in the nest include Geococcus coffeae , Rhizoecus coffeae , Pseudorhizoecus proximus , Rhizoecus caladii , and Rhizoecus falcifer , [5] and on several occasions, queen ants have been observed setting off on their nuptial flight carrying a fertilised female mealybug. [6]
Paraponera clavata is a species of ant, commonly known as the bullet ant, named for its extremely potent sting. It inhabits humid lowland rainforests from Nicaragua and the extreme east of Honduras and south to Paraguay.
Mealybugs are insects in the family Pseudococcidae, unarmored scale insects found in moist, warm habitats. Many species are considered pests by some humans as they feed on plant juices of greenhouse plants, house plants and subtropical trees and also act as a vector for several plant diseases. Some ants, however live in symbiotic relationships with them.
Scale insects are small insects of the order Hemiptera, suborder Sternorrhyncha. Of dramatically variable appearance and extreme sexual dimorphism, they comprise the superfamily Coccoidea. Adult females typically have soft bodies and no limbs, and are concealed underneath domed scales, extruding quantities of wax for protection. Some species are hermaphroditic, with a combined ovotestis instead of separate ovaries and testes. Males, in the species where they occur, have legs and sometimes wings, and resemble small flies. Scale insects are herbivores, piercing plant tissues with their mouthparts and remaining in one place, feeding on sap. The excess fluid they imbibe is secreted as honeydew on which sooty mold tends to grow. The insects often have a mutualistic relationship with ants, which feed on the honeydew and protect them from predators. There are about 8,000 described species.
Formica rufa, also known as the red wood ant, southern wood ant, or horse ant, is a boreal member of the Formica rufa group of ants, and is the type species for that group. It is native to Europe and Anatolia, but is also found in North America, in both coniferous and broad-leaf broken woodland and parkland. Workers are colored red and brownish-black, with a dorsal dark patch on the head and promensonotum, and are polymorphic, measuring 4.5–9 mm in length. They have large mandibles, and like many other ant species, they are able to spray formic acid from their abdomens as a defence. Formic acid was first extracted in 1671 by the English naturalist John Ray by distilling a large number of crushed ants of this species. These ants primarily eat honeydew from aphids. Some groups form large networks of connected nests with multiple queen colonies, while others have single-queen colonies.
La Selva Biological Station is a protected area encompassing 1,536 ha of low-land tropical rain forest in northeastern Costa Rica. It is owned and operated by the Organization for Tropical Studies, a consortium of universities and research institutions from the United States, Costa Rica, and Puerto Rico. Recognized internationally as one of the most productive field stations in the world for tropical forest research and peer-reviewed publications, La Selva hosts approximately 300 scientists and 100 university courses every year. The primary goal of La Selva Biological Station is to preserve and protect an intact forest, as well as providing laboratory facilities for tropical research and education. The research potential of the area is not only vital to tropical ecology, but it is also an important location in the effort to study relations between local communities and protected areas. In addition, its high diversity and ease of access to the Puerto Viejo-Horquetas highway makes La Selva an important ecotourism destination and environmental education center for tourists and the local community.
The Eucharitidae are a family of parasitic wasps. Eucharitid wasps are members of the superfamily Chalcidoidea and consist of three subfamilies: Oraseminae, Eucharitinae, and Gollumiellinae. Most of the 55 genera and 417 species of Eucharitidae are members of the subfamilies Oraseminae and Eucharitinae, and are found in tropical regions of the world.
Iridomyrmex, or the rainbow ant is a genus of ant first described by Austrian entomologist Gustav Mayr in 1862. He placed it in the subfamily Dolichoderinae of the family Formicidae. There are 79 described species and five fossil species. Most of these ants are native to Australia; others are found in Asia and Oceania, and they have been introduced to Brazil, New Zealand and the United Arab Emirates. Fossil species are known from China, France and the United States.
Trophobiosis is a symbiotic association between organisms where food is obtained or provided. The provider of food in the association is referred to as a trophobiont. The name is derived from the Greek τροφή trophē, meaning "nourishment" and -βίωσις -biosis which is short for the English symbiosis.
Acropyga is a genus of small formicine ants. Some species can be indirect pests. A. acutiventris, which is found from India to Australia, tends subterranean, root-feeding mealybugs of the species Xenococcus annandalei. Living, gravid females are carried in the jaws of A. acutiventris queens during their nuptial flight, to establish the symbiotic association in founding colonies. Other Acropyga species have relationships with different species of mealybugs, and it could be a trait common to the whole 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 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.
Electromyrmococcus is an extinct genus of mealybug in the Pseudococcidae subfamily Rhizoecinae. The genus currently contains three species, all from the early Miocene, Burdigalian stage, Dominican amber deposits on the island of Hispaniola.
Enchophora sanguinea is a species of lantern bug, a type of hemipteran, found in Central and South America. It was first described by William Lucas Distant in 1887. They are 25 millimetres (1.0 in) long. Their colour varies, but is normally red to green; they have a scimitar-shaped process on their heads. They feed on the sap of trees, most commonly Simarouba amara, and they excrete honeydew out of their anuses.
Acropyga acutiventris is an ant in the subfamily Formicinae. It lives underground in tropical regions and forms a mutualistic association with the mealybug, Xenococcus annandalei.
Xenococcus annandalei is a species of mealybug in the family Pseudococcidae that infests the roots of certain species of trees.
Doleromyrma darwiniana is a species of ant in the genus Doleromyrma. Described by Forel in 1907, the species is endemic to Australia and introduced to New Zealand, and it nests in soil or under stones and logs. The organism grows to a length between 2.0 and 3.0 millimeters. This species of ant maintains small colony sizes and it "prefers protein food." The species is also known by some sources as the "brown house ant" and "Darwin's ant". The species is considered a "minor urban pest" in New South Wales.
Acropyga glaesaria is an extinct species of ant in the subfamily Formicinae known from a group of possibly Miocene fossils found on Hispaniola. A. glaesaria is the first species of the ant genus Acropyga to have been described from fossils found in Dominican amber and is the one of several species of Acropyga found in the West Indies. As with other members of the genus, A. glaesaria was most likely trophobiotic.
Acropyga epedana is an ant in the subfamily Formicinae. It lives permanently underground in the Chiricahua Mountains in Arizona and forms a mutualistic association with the mealybug Rhizoecus colombiensis.
Brachygastra scutellaris, a honey wasp, is a Neotropical, swarm-founding species that is found in South America and has a medium-sized population of 100-1000 individuals per colony. It stores large amounts of nectar in its nest for the production of honey, and it was even found that at certain times of the year, the nectar is toxic to humans, as they will extract nectar from hallucinogenic plants, depending on the season.
Phenacoccus solenopsis, the cotton mealybug or solenopsis mealybug, is a species of mealybug in the family Pseudococcidae. Having originated in North America, it has spread to other parts of the world and become a major pest of cotton crops.
Geococcus coffeae is a species in the mealybug family, Pseudococcidae, commonly known as the coffee root mealybug, or brown scale. It lives underground where it inserts its mouthparts into roots and sucks the sap.