Mischocyttarus mexicanus cubicola

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Mischocyttarus mexicanus cubicola
Mischocyttarus.mexicanus (cropped).JPG
Mischocyttarus mexicanus cubicola nest on a palm in Florida
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Vespidae
Subfamily: Polistinae
Genus: Mischocyttarus
Species:
Subspecies:
M. m. cubicola
Trinomial name
Mischocyttarus mexicanus cubicola
Richards, 1978

Mischocyttarus mexicanus cubicola is a neotropical subspecies of paper wasp found in the New World. It is a social wasp that demonstrates two different types of nesting strategies, depending upon context. [1] This context-dependent trait makes Mischocyttarus mexicanus cubicola a good model to study social biology within social wasps. [1] In detail, this trait allows for the females of this species to form nests both individually and as co-founders with other females within the same colony. [2] This subspecies is also known to exhibit cannibalism, with M. m. cubicola queens feeding on their own larvae for nourishment when unaided by workers. [3]

Contents

Taxonomy and phylogeny

Mischocyttarus mexicanus cubicola is part of the family Vespidae, which classifies the species as a wasp. Wasps, including M. m. cubicola are classified under the order of Hymenoptera, making ants, bees, and sawflies, which fall under the same order, relatives of wasps. It then falls under the subfamily Polistinae, which is home to paper wasps specifically. [4] The genus of this species, Mischocyttarus , is the largest social wasp genus with 189 species and 15 subspecies. [5] Mischocyttarus mexicanus cubicola is one of two subspecies in the species mexicanus, the other subspecies being Mischocyttarus mexicanus mexicanus.

Description and identification

In general, the genus Mischocyttarus can be identified by the asymmetrical internal and external lobes of the thetarsal segments in adults. Similarly, mature Mischocyttarus larvae are identified by appendix-like projections extending forward from the abdominal sternum. [6] M. m. cubicola is similar to other species such as M. flavitarsis and M. angulatus as they all have a sharp secondary margin on their pronotum, the dorsal surface of the prothorax. [6] Males are seen to have short, thick antennae and females have a head plate, called a clypeus, with a flattened apex. The M. mexicanus species is usually orange-yellow in color, and the subspecies cubicola has yellow stripes on the mid tibia and hind tibia base. [6] The metasoma of this subspecies is reddish in color with yellow bands. [4]

Distribution and habitat

Mischocyttarus mexicanus cubicola is found to habit in primarily neotropical and temperate areas. M. m. cubicola nests have been found in the US states of Florida, Alabama, Georgia and South Carolina. Later, the subspecies was found to extend into Texas as well, as females were spotted in Bellaire, Houston. [7] This subspecies has also been found in other countries as well, such as Cuba, the Bahamas, and Puerto Rico. In the southernmost part of its range, Mischocyttarus mexicanus cubicola nests through the year, whereas in the more temperate regions, it hibernates during the winter season. This species is common, as it belong to the genus Mischocyttarus, which is the largest social wasp genus with 189 species and 15 subspecies. [5]

Colony cycle

The nests of Mischocyttarus mexicanus cubicola can be founded by anywhere from one to twenty females. Even through there is an early and late period for nests, the nests can be initiated during any part of the year. The founders of new nests are usually born at the same time and the nests they found are not too far from their natal nest site. [8] Each nest can have one or more queens and in addition there is a range of female sexual development. With that said, most females have the capability of becoming a queen, as most are reproductively viable. [8] These nests have combs of open cells that consist of paper that attached to leaves by a stem. The life cycle of the nest can be divided into two stages: pre-daughter and post-daughter stages, also known as pre-eclosion and post-eclosion nests. [9] The lifetime of a nest is estimated to be around eight months, although many nest disintegrate before this. [10]

Communication

Communication via biting is frequently seen to occur between nestmates of Mischocyttarus mexicanus cubicola. The foragers of pleometrotic nests were found to be the least aggressive individuals of a given colony. [9] It has also been observed that the females with the least developed ovaries were the ones that did the most foraging in a given colony. In addition, it has been hypothesized that as M. mexicanus cubicola individuals age, they accumulate a specific odor, which aligns with the observation that older female wasps are usually rejected from foreign nests. [11] It has also been found that male individuals of this species have exocrine gland cells in their gastral sternites, which supports the idea the M. m. cubicola uses chemicals for communication such as nest-mate recognition and pheromone signaling. [12]

Nesting tactics

There are two stable nesting strategies found within this subspecies: haplometrosis and pleometrosis. Haplometrosis is the single-foundress nesting strategy and pleometrosis is the strategy that involves multiple cofoundresses. [10] Both tactics are found to be stable in this species because they are context-dependent traits; each strategy is favorable in certain conditions. [1] This trait is also suggested to be plastic, as an adult female can switch nesting tactics as an adult depending on the context. [13] Haplometrosis is found most commonly in the winter and spring, whereas pleometrosis is found frequently in the fall. Haplometrotic nests are victim to greater mortality, as eighty percent of haplometrotic nests fail within twenty days. [9] It has been thought that larger females are more likely to be single foundresses in the spring and cofoundresses in the summer. In addition, when the number of potential habitats in a give area is experimentally decreased, the nests are more likely to be constructed by pleometrosis and the converse has also been found to exist as well. [9]

Nest usurpation

When a queen is removed from a nest, it has been observed over the course of a week that the eggs and larvae gradually disappear. During this time, no new cells are constructed in the nest and at the end of this time period, a subordinate wasp may begin the process of becoming the new queen by laying eggs. [2] It has also been noted that non-residents are accepted into a nest when the nest is new and the non-resident wasp is young. With that said, older nests tend to disallow non-residents and older wasps are usually not allowed to join colonies. [2] It has also been hypothesized that this species might be a brood parasite, cannibalizing on eggs of foreign nests and placing their own eggs in an empty cell of the foreign nest. These observations suggest that the M. mexicanus species reject foreign wasps based on the risk of nest usurpation. [2]

Social structure

Females within M. mexicanus cubicola colonies are at different levels of ovary development and although there are usually one or more queens in a given colony, many females are reproductive viable within the colony. [9] Females are highly variable after a nest is founded, as one may become the queen (the primary reproductive female) while the others become subordinates. [1] Consequently, due to the high variability in females, nest switching is common where if a queen is removed, a resident may quickly replace her over the course of a week. Even though females within a colony are of quite low levels of relatedness, some nests are pleometrotic perhaps due to reduced development times, larger colony sizes, and reduced mortality rates in these cofoundress nests. [8]

Lobe erection

Mischocyytarus larvae can be distinguished from other wasps by having a one-, two-, or three-pointed lobe on the ventral surface of the first abdominal segment. It has been hypothesized that these abdominal lobes play a role in feeding, with similar morphology to the trophthyllax of pseudomyrmecine ant larvae. [3] Later, it was also observed in a relative, M. drewseni , that the lobes did not play a role in feeding, but rather were involved in responding to saliva solicitation of a workers by either producing a droplet or secretion or if it did not have any secretion to yield, by going back into the cell and pulling its abdominal lobes over its head. [3] Therefore, it has also been suggested that these lobes are of adaptive value to the behavior of saliva donorism. This behavior has also been noted in both male and female larvae of Mischocyttarus mexicanus cubicola. [3]

Cannibalism

Intercolonial cannibalism is also found within the nests of the subspecies Mischocyttarus mexicanus cubicola, with foreign conspecific females having the ability to intrude on a nest once every five hours. [2] It has been thought that conspecifics may pose the greatest threat to females rearing their young in nests. Nest usurpation and stealing brood from those nests to feed young select for ground nest founding in these paper wasps. [2] The cannibalism of this species seems to show that when the queen is unaided by workers, she resorts to nourishing herself by feeding on her brood and their saliva rather than by foraging. [3]

Diet

Mischocyttarus mexicanus cubicola has been observed to forage for both arthropod and nectar-based foods. In addition to queens exhibiting cannibalism by feeding on their own larvae, it has been hypothesized that this species preys on arthropod larvae as well. [9] Additionally, females have been seen to forage on palmetto and Lyonia flowers. [9] Males also have been found on flowers and frequently jump onto other M. m. cubicola wasps that are foraging the same flowers, which is hypothesized to be related to mating habits of the species. [9]

Predators

Major sources of predation of Mischocyttarus mexicanus cubicola are birds such as wrens, blue jays, yellowthroats, cardinals, mockingbirds, and woodpeckers. [14] Spiders such as Argiope aurantia and Nephila clavipes are also known to be predators of this species. [9] Ant raids are also common to this species, even though it is rare that ants will raid a nest that hasn't already been abandoned. With that said, it is most common that a single ant will encounter a nest and be successfully deterred. Ant species such as Campanotus floridanus, Crematogaster ashmeadi, and Pheidole floridana have been observed to raid live nests and eat the wasp colony's brood. [2]

Related Research Articles

<i>Vespula vulgaris</i> Species of insect

Vespula vulgaris, known as the Common wasp, is a species found in regions that include the United Kingdom, Ireland, Germany, India, China, New Zealand and Australia. It is sometimes known in English as the European wasp, but the same name is used for the species Vespula germanica or German wasp. In 2010, the ostensible Vespula vulgaris wasps in North America were found to be a different species, Vespula alascensis.

<span class="mw-page-title-main">Polistinae</span> Subfamily of insects

The Polistinae is a subfamily of eusocial wasps belonging to the family Vespidae. They are closely related to the more familiar wasps and true hornets of the subfamily Vespinae, containing four tribes. With about 1,100 species total, it is the second-most diverse subfamily within the Vespidae, and while most species are tropical or subtropical, they include some of the most frequently encountered large wasps in temperate regions.

<i>Crematogaster ashmeadi</i> Species of ant

Crematogaster ashmeadi, commonly known as the acrobat ant, is an arboreal ant widespread in the Southeastern United States. It nests and forages almost exclusively above ground level, often found in treetops and on lianas. It is one of eleven species in the genus Crematogaster that is native to eastern North America. This ant species has been observed to raid wasp nests, including the species Mischocyttarus mexicanus, and to forage on their brood. It is the most dominant arboreal ant in the pine forests of the coastal plains of northern Florida. Colonies of these ants inhabit a majority of pine trees in the area, living in chambers in the outer bark of living trees that have been abandoned by bark-mining caterpillars, usually of the family Cossidae. C. ashmeadi does little to no excavation of its own, relying solely on chambers bored out by other insects.

<i>Ropalidia marginata</i> Species of insect

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.

<i>Polistes metricus</i> Species of wasp

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. Polistes metricus is dark colored, with yellow tarsi and black tibia. Nests of Polistes metricus can be found attached to the sides of buildings, trees, and shrubbery.

<i>Dolichovespula sylvestris</i> Species of wasp

The tree wasp is a species of eusocial wasp in the family Vespidae, found in the temperate regions of Eurasia, particularly in western Europe. Despite being called the tree wasp, it builds both aerial and underground paper nests, and can be found in rural and urban habitats. D. sylvestris is a medium-sized wasp that has yellow and black stripes and a black dot in the center of its clypeus. It is most common to see this wasp between May and September during its 3.5 month colony cycle.

<i>Polistes bellicosus</i> Species of insect

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.

<i>Synoeca cyanea</i> Species of wasp

Synoeca cyanea, commonly known as the marimbondo-tatu in Brazil, is a swarm-founding eusocial wasp. Native to Brazil and Argentina, S. cyanea is one of the largest and most aggressive species of social wasps and is feared in many rural areas. It begins its colony cycle in the early spring and continues until nest abandonment. Throughout its life, S. cyanea forage sugary substances and animal carcasses for food and wood pulp for its nest. S. cyanea is also known for its strong venom, which is enough to cause haemolytic activity.

<i>Agelaia pallipes</i> Species of wasp

Agelaia pallipes is a species of social paper wasp found from Costa Rica to Brazil, Argentina and Paraguay. A. pallipes is ground-nesting and is one of the most aggressive wasps in South America. This species is a predator of other insects, including flies, moths, and ground crickets, as well as baby birds.

Polistes pacificus is a Neotropical species of social paper wasp belonging to the subfamily Polistinae and the family Vespidae. P. pacificus can be found distributed throughout most of Central and South America and parts of southern North America. First discovered by Johan Christian Fabricius in 1804, P. pacificus is much darker in color than some other more recognizable Polistes wasps, and is one of the insects commonly eaten by several indigenous groups in Venezuela and Colombia.

<i>Polistes biglumis</i> Species of wasp

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.

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.

Protopolybia exigua is a species of vespid wasp found in South America and Southern Brazil. These neotropical wasps, of the tribe Epiponini, form large colonies with multiple queens per colony. P. exigua are small wasps that find nourishment from nectar and prey on arthropods. Their nests are disc-shaped and hang from the undersides of leaves and tree branches. This particular species of wasp can be hard to study because they frequently abandon their nests. P. exigua continuously seek refuge from phorid fly attacks and thus often flee infested nests to build new ones. The wasps' most common predators are ants and the parasitoid phorid flies from the Phoridae family.

<i>Polybia sericea</i> Species of wasp

Polybia sericea is a social, tropical wasp of the family Vespidae that can be found in South America. It founds its colonies by swarming migrations, and feeds on nectar and arthropods.

<i>Mischocyttarus flavitarsis</i> Species of wasp

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.

<i>Polistes versicolor</i> Species of wasp

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 substratum 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. The P. versicolor colony cycle broadly ranges from 3 to 10 months, although there appears to be no relationship between the colony's development and the season of the year. While yellow paper wasps do have clear annual colony cycles, many young queens have the opportunity to hibernate during the winter, forming optional winter aggregations. Dominance hierarchies within these aggregations are characterized by physical aggression of the dominant female(s) towards the associated females, who tend to be sisters. Wagging movements are also often used as a form of communication within the colony. The yellow paper wasp is generally predatory, capturing a wide range of insects, although it often feeds on pollen and nectar as well. Therefore, P. versicolor can be useful as a pollinator or as effective pest control.

<i>Agelaia multipicta</i> Species of wasp

Agelaia multipicta is a swarm-founding, highly eusocial wasp that lives in Mexico, Argentina, Trinidad and southern Brazil. It nests in natural cavities such as hollow trees and aggressively defends the nest from ants, who are brood predators. The workers and queens are morphologically distinguished by ovarian development as well as external features such as a larger petiole and gaster in the queen. Like other carrion-eating (necrophagous) wasp species, A. multipicta plays a scavenging role in the ecosystem. Agelaia multipicta was described by the Irish entomologist Alexander Henry Haliday in 1836.

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.

<i>Mischocyttarus mexicanus</i> Species of wasp

Mischocyttarus mexicanus is a New World species of paper wasp that exhibits facultative eusocial behavior and includes at least two subspecies living in the southern United States and Central America. This social wasp species is a good model for studying the selective advantage of different nesting tactics within a single species. M. mexicanus females can form nests both as individuals and as members of a colony, and are even known to switch between these two nesting strategies throughout their life, which is an unusual phenomenon in the field of social biology. Individuals in a colony have particular social roles that are plastic, as opposed to rigid castes, and brood parasitism and usurpation have been observed between unrelated conspecifics. They nest in a variety of types of plants and human constructions, although they have most frequently been observed in palm trees, and they are known to interact with a number of other species as prey, competitors over resources, or foragers.

<span class="mw-page-title-main">Pleometrosis</span>

Pleometrosis is a behavior observed in social insects where colony formation is initiated by multiple queens primarily by the same species of insect. This type of behavior has been mainly studied in ants but also occurs in wasps, bees, and termites. This behavior is of significant interest to scientists particularly in ants and termites because nest formation often happens between queens that are unrelated, ruling out the argument of inclusive fitness as the driving force of pleometrosis. Whereas in other species such as wasps and bees co-founding queens are often related. The majority of species that engage in pleometrosis after the initial stages of colony formation will reduce their colonies number of queens down to one dominant queen and either kill or push out the supernumerary queens. However there are some cases where pleometrosis-formed colonies keep multiple queens for longer than the early stages of colony growth. Multiple queens can help to speed a colony through the early stages of colony growth by producing a larger worker ant population faster which helps to out-compete other colonies in colony-dense areas. However forming colonies with multiple queens can also cause intra-colony competition between the queens possibly lowering the likelihood of survival of a queen in a pleometrotic colony.

References

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