Ropalidia plebeiana | |
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Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Arthropoda |
Class: | Insecta |
Order: | Hymenoptera |
Family: | Vespidae |
Subfamily: | Polistinae |
Tribe: | Ropalidiini |
Genus: | Ropalidia |
Species: | R. plebeiana |
Binomial name | |
Ropalidia plebeiana (Richards, 1978) | |
Ropalidia plebeiana is a eusocial temperate paper wasp. [1] It is unique, as it is the only temperate wasp in the typically tropical Ropalidia genus. [2] R. plebeiana is widely distributed in eastern Australia, and recently have been found making huge nest aggregations, with thousands of nests on trunks of trees, in south-eastern New South Wales. [1]
R. plebeiana is in the Vespidae family along with thousands of other wasp species. The genus, Ropalidia , is typically made up of wasps that live in tropical locations, but R. plebeiana is the exception. The genus, Ropalidia is classified as brown paper wasps. Although R. plebeiana does not yet have a place within the taxonomy of the Ropalidia family, it has been discovered to be closely related to R. proletaria. [3]
R. plebeiana is a white-faced, brown paper wasp. It is a medium-size paper wasp, with a reddish-brown-colored body. There are small, thin white rings on its shoulders, waist, and abdomen. [4]
Nests of R. plebeiana are seen as a horizontal single comb with an irregular shape, and they are grayish brown in color. [5] Nests have been found to have 1–3 males and anywhere from 13 to 28 females. [1] R. plebeiana nests have been found to have about 40 cells, which have transparent windows, with about 20 larvae and eggs at any point. The central cells of the nest are where the cocoons and larvae are found, and these cells are usually longer than the peripheral cells that contain eggs. The nests are seen to congregate in central areas in a “city” type atmosphere. [5] Cooperation has been witnessed between different nest combs, and each separate nest comb is occupied by a single colony. [6]
R. plebeiana is widely distributed in Australia. [1] It is found mainly in New South Wales and the Capital Territory, but they are also found in southern Queensland. Brisbane is generally considered to be the northern boundary of the species distribution. [5] However, R. plebeiana can also be found north of Brisbane, further inland in tropical highland areas as well, such as the Atherton Tableland. [6]
R. plebeiana builds its nest in aggregations, which are often formed under bridges and under overhanging rocks. These aggregations are made of separate nests that are built side by side. They were often built over running water. [7] R. plebeiana with nests in Canberra are not aggregated. [1]
R. plebeiana colonies have a single top-dominant female, or they are started by one or more foundresses that then compete for egg laying duties. R. plebeiana colonies start in early austral spring. The first brood of workers emerge as adults in mid-December. Reproductive females and males present in early March, and the females may become the foundresses of nests. They are called gynes. Gynes do not stay in the nest after they emerge as adults, but may spend their winters in their maternal nests. [6] [8] Most wasps were gone from the nest by late austral autumn, and this ends the reproductive stage of the nest. Most females leave the nest by May 1. Founding females in the nests do not stay in the nest overnight, and before dusk they leave the nest for the night. Females returned to the nest when the sun heated up the nest, and began their activities. These patterns of leaving and returning depend on the temperature of the nest. [6]
Nests maintain their structural integrity over the winter months because they are hidden from the elements, and top dominant females sometimes occupy previously occupied nests. [6] They may return to the nests of their mothers to start their own colony there or with up to 10 other females. If this is the case, the foundresses divide the comb into their own nesting areas. They then fight to be the sole foundress and egg layer. Other females may remain as subordinate workers. The first brood females were larger than non laying foundresses in the nest. [7] Occupying an old nest has advantages, because females do not feed to forage for nesting materials, and they can spend nights and cold days in the places between the nests in aggregations. The competition for these old nests is fierce, and early females have the advantage. Females may lose the competition to be egg-layers at a nest, but may remain in the nest to get the benefit of fitness through relatives kin or by creating their own nests nearby, adding to the nest aggregation. [6]
Foundresses have developed ovaries with oocytes, and those with only slightly developed ovarioles are non laying foundresses. Foundresses had fresh wings and mandibles, whereas other females (the non-laying foundresses) had worn-out, shorter wings and mandibles. The length of the largest body mass of the wasp, the mesosoma, is greater in multi-female colonies than other colonies. Solitary laying foundresses were smaller than those of multi-female colonies. Once the dominance hierarchy of the foundresses has occurred, monopolization of the oviposition by a single foundress occurs. There can be more than one laying foundress in colonies with more than 20 foundresses. Single foundress colonies were more common in newly constructed nests. [7]
An aggregation is a collection of nests built next to each other, and the collection of nests interact with each other for various purposes. Nests communicate in different ways. The nests in an aggregation are suspended side by side. They are suspended in a horizontal position from whatever they are nesting against, but older nests may be suspended vertically. New nests form mainly along the edge of aggregations. [8] R. plebeiana nest aggregations can persist for up to 15 years. In aggregations of R. plebeiana, each comb is independent nest that is occupied by residential females. There is rarely drift between the different nests, and aliens to the nest were expelled and attacked. [2]
Nests are very beneficial to R. plebeiana. Survival rate of nests in aggregation are very high, over 90%. The main pros of aggregating are high survival rates of nests and high reproductive rates for females. However, overexploitation of food sources such as insects may occur, so foraging trips may need to be at locations farther away from the nests. Possible reasons for aggregation are based on cooperation or the selfish herd effect. Also, the whole colony together may act as a communal defense against predators. There are risks however, because if a new nest joins the aggregation and does not play a role in this defense, they could increase their fitness at the expense of everyone else. The factors regulating the aggregations in these areas as forest fires, which could destroy a whole aggregation, the collapse of the cliffs they are built on, and possible attacks by predators. [8]
In R. plebeiana, the regular nestmates do not direct any dominance or aggressive acts. Some dominance acts that the top dominant female conducted were “dart at another but stop short.” They also attack new wasps coming to the nest. The top dominant female can mount the new wasps body and tried to sting them repeatedly in order to get them to leave the nest. The attacked wasp made a particular posture when attacked, tried to integrate into the nest, and successfully did so. [5] Sometimes, when females land on strange combs in a nest aggregation, they immediately leave without being attacked. [2] Other dominance acts exhibited by females were pecking, mounting, and biting. Sometimes these fights resulted in a loss of wing ability. [6]
In R. plebeiana, females, not males are the ones who forage for the food for larvae. Females also forage for plant fibers for nest construction. The top dominant female does not forage directly for insect meat, the other females do. [1] On foraging trips, these females get solid food, honey, water, or pulp for the nest. [5] Sometimes however, the females give the flesh pellets they accumulate while foraging to the top-dominant female, who passes these pellets onto the males. In this way, both males and females do the feeding. Flesh pellets are shared with individuals back at the nest upon return, and they are particularly often shared with males. Males do not solicit prey-laden females for these pellets, but they are given to them. [1]
Food for larvae is typically insects. Food is brought back to the nests by females, and then distributed. The period of malaxation for females is generally much shorter than males, about 30 seconds, and then they feed several larvae with a single flesh pellet. Males on the other hand can chew for a couple of minutes, approximately 3–4 minutes, and then feed only one mature larva during a feeding episode. This larval feeding by males means they are extracting liquid from the food, possibly to get rid of the pellet after this extraction. However, males of R. plebeiana were not observed to get rid of pellets, so further research needs to be conducted. [1]
In R. plebeiana, specifically in aggregations of nests, females were observed to have specific behaviors when in their individual nests. Females repeatedly stick their head into larval cells and vibrate their heads in the cell. This behavior was observed as a way for the females to check on the larvae. Females were also observed to “kiss” for the sake of transferring food or liquid between different members of the nest. When the regular females the top dominant female kissed, the top dominant female got the larger part of the food. Females also “kissed” males in order to pass food along to them, so that they could also feed the larvae. [5]
The European paper wasp is one of the most common and well-known species of social wasps in the genus Polistes. Its diet is more diverse than those of most Polistes species—many genera of insects versus mainly caterpillars in other Polistes—giving it superior survivability compared to other wasp species during a shortage of resources.
Polistes gallicus is a species of paper wasp found in various parts of Europe, excluding England, Denmark, and Scandinavia, from warmer climates to cooler regions north of the Alps. Nests of these social insects are created in these various conditions. The Polistes species use an oral secretion to construct their nests, which consist of a combination of saliva and chewed plant fibers. This structural mixture physically protects the nest from various harsh elements and from weathering over time.
Ropalidia marginata is an Old World species of paper wasp. It is primitively eusocial, not showing the same bias in brood care seen in other social insects with greater asymmetry in relatedness. The species employs a variety of colony founding strategies, sometimes with single founders and sometimes in groups of variable number. The queen does not use physical dominance to control workers; there is evidence of pheromones being used to suppress other female workers from overtaking queenship.
Polistes annularis is a species of paper wasp found throughout the eastern half of the United States. This species of red paper wasp is known for its large size and its red-and-black coloration and is variably referred to as a ringed paper wasp or jack Spaniard wasp. It builds its nest under overhangs near bodies of water that minimize the amount of sunlight penetration. It clusters its nests together in large aggregations, and consumes nectar and other insects. Its principal predator is the ant, although birds are also known to prey on it. Unlike other wasps, P. annularis is relatively robust in winter conditions, and has also been observed to store honey in advance of hibernation. This species has also been used as a model species to demonstrate the ability to use microsatellite markers in maternity assignment of social insects.
Polistes metricus is a wasp native to North America. In the United States, it ranges throughout the southern Midwest, the South, and as far northeast as New York, but has recently been spotted in southwest Ontario. A single female specimen has also been reported from Dryden, Maine. P. metricus is dark colored, with yellow tarsi and black tibia. Nests of P. metricus can be found attached to the sides of buildings, trees, and shrubbery.
Polistes fuscatus, whose common name is the dark or northern paper wasp, is widely found in eastern North America, from southern Canada through the southern United States. It often nests around human development. However, it greatly prefers areas in which wood is readily available for use as nest material, therefore they are also found near and in woodlands and savannas. P. fuscatus is a social wasp that is part of a complex society based around a single dominant foundress along with other cofoundresses and a dominance hierarchy.
Belonogaster juncea is a typical quasisocial paper wasp from sub-saharan Africa and south-western Asia. It is the type species for the genus Belonogaster.
Polistes carolina is one of two species of red paper wasp found in the eastern United States and is noted for the finer ridges on its propodeum. It is a social wasp in the family Vespidae and subfamily Polistinae. The species is native to the United States from Texas to Florida, north to New York, and west to Nebraska. The wasp's common name is due to the reddish-brown color of its head and body. P. carolina prefer to build their nests in protected spaces.
Belonogaster juncea juncea is a subspecies of Belonogaster juncea and is classified as a primitively eusocial wasp, meaning that the species is social while exhibiting a morphology that is indistinguishable from that of other castes. It is also classified as a type of African Paper Wasp. Many of the studies relating specifically to B. j. juncea take place at the University of Yaoundé in Cameroon.
Ropalidia fasciata, a common paper wasp, is a wide-ranging species that is distributed from India to the Lesser Sunda Islands, Palawan, and Ryukyu Islands, occupying the northern edge of Ropalidia's larger distribution. These primitively eusocial wasps are unique in that they do not exhibit the strict matrifilial, single-queen social structure found in many species of social insects. Instead, colonies are founded based on associations between several females, or 'foundresses'.
Polistes nimpha is a eusocial paper wasp found all over Europe, with particular sightings in Turkey, Finland, Estonia, and Latvia. It is also found in northern Africa, Pakistan, Iran, India, Kazakhstan, Mongolia, and China. The climate in these areas is relatively cold and snowy in the winter, while summers are usually hot and dry, with steppe vegetation. Polistes nimpha colonies are relatively small and easily manipulated.
Polistes bellicosus is a social paper wasp from the order Hymenoptera typically found within Texas, namely the Houston area. Like other paper wasps, Polistes bellicosus build nests by manipulating exposed fibers into paper to create cells. P. bellicosus often rebuild their nests at least once per colony season due to predation.
Belonogaster petiolata is a species of primitively eusocial wasp that dwells in southern Africa, in temperate or subhumid climate zones. This wasp species has a strong presence in South Africa and has also been seen in northern Johannesburg. Many colonies can be found in caves. The Sterkfontein Caves in South Africa, for example, contain large populations of B. petiolata.
Polistes biglumis is a species of social wasp within Polistes, the most common genus of paper wasp. It is distinguished mainly by its tendency to reside in montane climates in meadows or alpine areas. Selection pressure from the wasp's environment has led to several idiosyncrasies of its behavior and lifecycle with respect to its relative species in the genus Polistes. It alone among paper wasps is often polyandrous. In addition, it has a truncated nesting season that gives rise to unique competitive dynamics among females of the species. P. biglumis wasps use an odor-based recognition system that is the basis for all wasp-to-wasp interaction of the species. The wasp's lifecycle is highly intertwined with that of Polistes atrimandibularis, an obligate social parasite wasp that frequently invades the combs of P. biglumis wasps.
Ropalidia revolutionalis, the stick-nest brown paper wasp, is a diurnal social wasp of the family Vespidae. They are known for the distinctive combs they make for their nests, and they have been found in Queensland, Australia in the areas of Brisbane and Townsville. They are an independent founding wasp species, and they build new nests each spring. They can be helpful because they control insect pests in gardens.
Mischocyttarus drewseni, which is sometimes spelled "drewsenii", is a social wasp in the family Vespidae. It is commonly found in Neotropical regions of South America, including Brazil, Peru, Venezuela, Colombia and Paraguay. This mid-sized wasp is about 1.5-1.8 cm and is typically dark brown or black in color. This species makes their nests out of woody plant fibers and create single combed nests with hexagonal cells which are typically found in low lying grass habitats or semi-urban environments. The colony cycle for this species is initiated by the queen who starts building the nest cell by cell. The nest construction process is highly elaborate and involves foraging for materials, creating cells, and heightening cell walls. It feeds on arthropods, plant nectar, and honeydew, and the species is very protective of its brood when it comes to defending them from their predators. The life cycle of this species has several stages with varying lengths, including egg, larval, pupal, and adult stages. As a social wasp species, there are several castes within the colony and different castes perform different specialized jobs with differing dominance and reproductive behaviors.
Polistes japonicus is a eusocial paper wasp found in Japan. It was first described by Henri Louis Frédéric de Saussure in 1858. It is closely related to Polistes formosanus. This species lives in small colonies with few workers and a foundress queen. Nests of these wasps are sometimes used as a traditional medicine in Korea, China, and Japan.
Mischocyttarus flavitarsis is a social paper wasp found in western North America. Their nests can be found both in forests close to rivers or in close proximity to human life under the eaves of roofs. Despite the fact that M. flavitarsis nests are frequently in close contact with humans, M. flavitarsis typically will not sting, but rather ram into the threatening individual. Their colony cycle typically begins before May and will last until October. The queen will then seek a hibernation site for the winter. Perched near female hibernation sites are males with whom the female will mate. The males have claimed their territory by rubbing sternal brushes along the border of the site, leaving a chemical that deters other individuals from approaching. M. flavitarsis feed on arthropods, nectar, and animal carcasses and are often prey to birds, ants, and praying mantis.
Polistes versicolor, also known as the variegated paper wasp or yellow paper wasp, is a subtropical social wasp within Polistes, the most common genus of paper wasp. It is the most widely distributed of South American wasp species and is particularly common in the Southeastern Brazilian states. This social wasp is commonly referred to as the yellow paper wasp due to the distinct yellow bands found on its thorax and abdomen. The P. versicolor nest, made of chewed vegetable fiber, is typically a single, uncovered comb attached to the substrate by a single petiole. The yellow wasp is frequently found in urban areas. New nests and colonies are usually founded by an association of females, sometimes in human buildings.
Polistes erythrocephalus is a species of paper wasp in the subfamily Polistinae of family Vespidae found in Central and South America. P. erythrocephalus is a eusocial wasp, meaning that it possesses both reproductive and non-reproductive castes. The cooperation between the two castes to raise young demonstrates the altruistic nature of these wasps. P. erythrocephalus exhibits a four-stage colony cycle, as do many other Polistes wasps. This species generally feeds on larvae, occasionally their own, and is preyed upon by species such as army ants.