Brachygastra mellifica | |
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Close-up | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Arthropoda |
Class: | Insecta |
Order: | Hymenoptera |
Family: | Vespidae |
Subfamily: | Polistinae |
Tribe: | Epiponini |
Genus: | Brachygastra |
Species: | B. mellifica |
Binomial name | |
Brachygastra mellifica (Say, 1837) | |
Synonyms [1] | |
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Brachygastra mellifica, commonly known as the Mexican honey wasp, is a neotropical social wasp. It can be found in North America. B. mellifica is one of few wasp species that produces honey. It is also considered a delicacy in some cultures in Mexico. This wasp species is of use to humans because it can be used to control pest species and to pollinate avocados.
The species that comprise the genus Brachygastra are neotropical social wasps. [2] They can be found from southern United States to Northern Argentina and include a total of 16 species. [3] B. mellifica is the only species present in the US, found in both Arizona and Texas. B. mellifica ranges from Texas to Panama. [4] This genus is known for its easily recognizable abdomen, which can be almost as wide as it is long, and its very high scutellum that often projects over the metanotum. B. mellifica is very similar in morphology to B. lecheguana but differs in its geographic distribution. [2]
In general, external reproductive organs can distinguish males from females; only females have stingers. Workers and males share the same coloration. They both have alternating abdominal bands of yellow and black. Queens characteristically have a dark reddish-brown abdominal coloration. Queens can also be distinguished from workers due to the occurrence of sperm in the spermathecae of the queens. [5] This species is small with a body length of 7-9 mm. [3]
Brachygastra mellifica make paper nests that range in size from 40–50 cm in diameter. These nests are quite full and can house anywhere from 3,500 to 18,700 wasps. [3] The nest begins as a single irregular layer of cells attached to the first layer of carton on a branch. Clumps of cells on the branch are then extended into the first hanging layer. Successive layers are formed independently and extend out and around the bottom of the first layer. This happens multiple times around and over the previous layer, resulting in a growing spiral. The nest goes from a small, flat oval to a sausage- or capsule-like shape over time. The surface of the nest is blotchy, colored brown or grey, varying as a result of the raw materials used for construction. The texture of the surface is that of rough cardboard, and is not glossy. [6]
The Mexican honey wasp is found in a range from northern Panama through most of subtropical Central America and Mexico. They are also found in southeastern Arizona and the most southern counties of Texas. [6] It builds its nest in the canopy of a shrub or a tree, often 1 to 9 m above the ground. [3] Nests are often reported to be located in suburban settings that are close to human habitation. They are well covered in the foliage in which they are built. These nests can be threatened by urban development, such as in Texas. [6]
Nests of B. mellifica can have anywhere from 3,500 to 18,700 wasps. [3] Populations are abundant during July and September, which are times associated with plentiful citrus groves and thus large populations of the psyllid Diaphorina citri , a common prey of B. mellifica. [6] When the D. citri nymphs are not plentiful, the wasps nearly disappear until D. citri populations return the following spring. [7] Clusters of colonies of B. mellifica are common, which suggests that swarms may only travel several hundred meters to start a new colony. [6] According to some sources, it is not apparent whether queens start new colonies independently or if they intrude on another colony. Queens either mate and reproduce in their original colony, or can split off with a number of workers, in order to found a new colony via swarming.
Males do also remain in their biological colonies and do not travel to other colonies to seek matings. Depending on the ratio of workers to queens in the colony, queens will regulate the number of new queens and workers raised. New queens are not produced unless there is only one queen remaining, following a cyclical monogyny colony cycle. [5] Like most eusocial hymenoptera, communities of B. mellifica consist predominantly of sterile female workers and relatively few male drones and queens. The number of fertilized queens can range into the hundreds in B. mellifica colonies. The high relatedness of a given colony's queens may indicate that such queens are only produced in the colony when there is a single queen. [5] Colonies with a single queen have not been reported, indicating that if such a condition exists that it is a short-lived period in the colony's life cycle.
Queens within a single colony are highly related, which is consistent with the hypothesis that queens are only produced when the colony contains one queen. In a study on kin selection and relatedness the worker wasps were considerably more related to the queens than to other workers. On average, workers have an r=0.37 for relatedness to queens. [5]
B. mellifica genetics show high levels of relatedness among workers despite the large number of queens per colony. R=0.23 for all workers to each other, which is significantly lower than the relatedness of workers to queens. [5] Genetic relatedness was determined in the study using PCR. DNA microsatellites are good genetic markers for studying relatedness due to their Mendelian behavior and high variability. DNA was sampled from the whole wasp, thorax and head, or thorax alone in this study. [5]
The split-sex ratio is a result of the asymmetrical relatedness between brothers and sisters, since B. mellifica are haplodiploid. When there are many queens, males are produced. Since workers can share a maximum of 3/4 of their genes with sisters, they favor caring for female siblings over male siblings, who only share a maximum of 1/2 of their genes. Since this wasp follows a cyclical monogynous pattern, there is increased relatedness among all of the progeny. The split-sex ratio is the most distinct in any swarm-founding wasp currently studied. [5] Research done on kin selection and relatedness showed that queens produce the eggs that become males, not workers. Workers 'police' each other to make sure the queens produce most, if not all, of the males. [5]
Brachygastra mellifica is very good at searching and feeding on Diaphorina citri in tree flushes, an introduced species that has become one of their major prey items. These wasps feed not only on the fluids from the prey, but may also eat the entire exoskeleton of D. citri. They also may consume larvae of the weevil Anthonomus aeneoulus and a moth from the family Alucitidae. [7] Trophallaxis, or regurgitation, has also been observed on the nest surface of the Mexican honey wasp, in which the forager regurgitates a drop of nectar to a responsive wasp. [6]
Diogmites angustipennis is a robber fly known to prey on honeybees that has been observed preying on B. mellifica. Orb-weaving spiders have also been known to take single wasps as prey outside the nest. Attacks on the entire nest are also common. Both opossums and golden-fronted woodpeckers have been seen dissecting a nest. Other dismembered nests have damage that is similar to the damage caused by the woodpeckers to the nests. [6]
It is thought that wasps and stingless bees were the first pollinators of the avocado, before the introduction of the European honeybee to the Americas. Brachygastra mellifica are pollinators because when they collect food for their larvae; they carry much pollen on their hairy head – including avocado pollen. They also carry pollen on their thorax and legs, and inside their unique thoracic cavities. While many other wasp species visit avocado flowers, they contribute less to pollination due to lower visitation rates and/or carrying less pollen on their bodies. [8]
It has been suggested that B. mellifica can be used as a natural biological control agent. [6] They offer many features, such as the ease of which the nests can be moved, the speediness of population growth, and the fact that closed system preservation is possible. One pest species of particular interest to scientists is Diaphorina citri , a very destructive pest of Citrus trees, which carries bacteria that make the fruit inedible and slowly kill the trees (citrus greening disease). [7] Diaphorina citri is a major prey of B. mellifa and it would be beneficial to use these wasps to attack these pests.
B. mellifica is one of few insects besides bees to create and store their own honey. Chromatographic analysis of B. mellifica honey showed 6/7 of the same peaks that appeared in honeybee mesquite honey. Melibiose is the only peak that did not occur in both honeys. Both the glucose and fructose content in B. mellifica honey are comparable to that of honeybee mesquite honey. The similarities in the two honeys substantiate the idea that these are foraging wasps, because honey stores come from multiple common floral sources, such as mesquite and sunflower. [6]
Brachygastra mellifica serve as a food source for the Popoloca Town of Los Reyes Metzontla, Mexico. The Popolucas have at least 17 species of insects in their diet, including B. mellifica and other wasps. The Spanish local name for this delicacy is "Panal Miniagua", and the Popoluca name is "Cuchii". They eat the honey and larvae of these wasps year round, but only harvest when the moon is between its last quarter and waning gibbous. According to traditional knowledge and experience, the nests are full of honey and larvae at this time. These insects can be cooked and eaten with salsa and tortillas. [9]
Bees are winged insects closely related to wasps and ants, known for their roles in pollination and, in the case of the best-known bee species, the western honey bee, for producing honey. Bees are a monophyletic lineage within the superfamily Apoidea. They are currently considered a clade, called Anthophila. There are over 20,000 known species of bees in seven recognized biological families. Some species – including honey bees, bumblebees, and stingless bees – live socially in colonies while most species (>90%) – including mason bees, carpenter bees, leafcutter bees, and sweat bees – are solitary.
A honey bee is a eusocial flying insect within the genus Apis of the bee clade, all native to mainland Afro-Eurasia. After bees spread naturally throughout Africa and Eurasia, humans became responsible for the current cosmopolitan distribution of honey bees, introducing multiple subspecies into South America, North America, and Australia.
Hornets are the largest of the eusocial wasps, and are similar in appearance to their close relatives yellowjackets. Some species can reach up to 5.5 cm (2.2 in) in length. They are distinguished from other vespine wasps by the relatively large top margin of the head. Worldwide, 22 species of Vespa are recognized. Most species only occur in the tropics of Asia, though the European hornet is widely distributed throughout Europe, Russia, North America, and north-eastern Asia. Wasps native to North America in the genus Dolichovespula are commonly referred to as hornets, but all of them are actually yellowjackets.
The Vespidae are a large, diverse, cosmopolitan family of wasps, including nearly all the known eusocial wasps and many solitary wasps. Each social wasp colony includes a queen and a number of female workers with varying degrees of sterility relative to the queen. In temperate social species, colonies usually last only one year, dying at the onset of winter. New queens and males (drones) are produced towards the end of the summer, and after mating, the queens hibernate over winter in cracks or other sheltered locations. The nests of most species are constructed out of mud, but polistines and vespines use plant fibers, chewed to form a sort of paper. Many species are pollen vectors contributing to the pollination of several plants, being potential or even effective pollinators, while others are notable predators of pest insect species, and a few species are invasive pests.
Dolichovespula maculata is a species of wasp in the genus Dolichovespula and a member of the eusocial, cosmopolitan family Vespidae. It is known by many colloquial names, primarily bald-faced hornet, but also including bald-faced aerial yellowjacket, bald-faced wasp, bald hornet, white-faced hornet, blackjacket, white-tailed hornet, spruce wasp, and bull wasp. Technically a species of yellowjacket wasp, it is not one of the true hornets, which are in the genus Vespa. Colonies contain 400 to 700 workers, the largest recorded colony size in its genus, Dolichovespula. It builds a characteristic large hanging paper nest up to 58 cm (23 in) in length. Workers aggressively defend their nest by repeatedly stinging invaders.
The Asian giant hornet or northern giant hornet, including the color form referred to as the Japanese giant hornet, is the world's largest hornet. It is native to temperate and tropical East Asia, South Asia, Mainland Southeast Asia, and parts of the Russian Far East. It was also found in the Pacific Northwest of North America in late 2019 with a few more additional sightings in 2020, and nests found in 2021, prompting concern that it could become an invasive species. However, by the end of the season in November 2022, there were no confirmed sightings in North America at all, suggesting they may have been eradicated in that region.
The Polistinae is a subfamily of eusocial wasps belonging to the family Vespidae. They are closely related to the 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.
Honey wasps are species in the genus Brachygastra of the family Vespidae. Brachygastra comprises 17 species of social paper wasps. The ancestral species are thought to have diverged about 32 million years ago within diverse Amazonian rainforest. Subsequent speciation within the genus is thought to have mostly occurred between 23 Ma and 10 Ma, during the time of the Andean uplift when the landscape was significantly altered due to tectonic activity. The current cladistic organisation of the genus has been heavily reliant on morphological characteristics.
Mass provisioning is a form of parental investment in which an adult insect, most commonly a hymenopteran such as a bee or wasp, stocks all the food for each of her offspring in a small chamber before she lays the egg. This behavior is common in both solitary and eusocial bees, though essentially absent in eusocial wasps.
A wasp is any insect of the narrow-waisted suborder Apocrita of the order Hymenoptera which is neither a bee nor an ant; this excludes the broad-waisted sawflies (Symphyta), which look somewhat like wasps, but are in a separate suborder. The wasps do not constitute a clade, a complete natural group with a single ancestor, as bees and ants are deeply nested within the wasps, having evolved from wasp ancestors. Wasps that are members of the clade Aculeata can sting their prey.
Polistes humilis, known as the Australian paper wasp, is a species of wasp in the family Vespidae that is found throughout Australia and which has been introduced to northern New Zealand. These paper wasps can be identified by their long thin legs and banded yellow and black coloring. They have been known to re-utilize old nests. While the species does not exhibit morphological class differences, there are distinct behavioral differences between queens and workers. In addition, the species is eusocial and benefits from relatedness between individuals. They are known for delivering a painful sting, especially when their nest is disturbed, a behavior that has been developed as a nest defense mechanism. While wasps are often viewed negatively, they play an important pollination role for many plants.
Vespula pensylvanica, the western yellowjacket, is a Nearctic species of wasp in the genus Vespula. It is native to regions of North America, largely in areas with northern temperate climates. Its reproductive behavior is constrained by cold weather, which successfully reduces the number of western yellowjackets in cold months. However, in the absence of cold weather, this wasp's population can explode. The western yellowjacket has become particularly invasive in the Hawaiian Islands, resulting in their label as a major pest.
Trigona spinipes is a species of stingless bee. It occurs in Brazil, where it is called arapuá, aripuá, irapuá, japurá or abelha-cachorro ("dog-bee"). The species name means "spiny feet" in Latin. Trigona spinipes builds its nest on trees, out of mud, resin, wax, and assorted debris, including dung. Therefore, its honey is not fit for consumption, even though it is reputed to be of good quality by itself, and is used in folk medicine. Colonies may have from 5,000 to over 100,000 workers.
Bombus fervidus, the golden northern bumble bee or yellow bumblebee, is a species of bumblebee native to North America. It has a yellow-colored abdomen and thorax. Its range includes the North American continent, excluding much of the southern United States, Alaska, and the northern parts of Canada. It is common in cities and farmland, with populations concentrated in the Northeastern part of the United States. It is similar in color and range to its sibling species, Bombus californicus, though sometimes also confused with the American bumblebee or black and gold bumblebee. It has complex behavioral traits, which includes a coordinated nest defense to ward off predators. B. fervidus is an important pollinator, so recent population decline is a particular concern.
Vespula squamosa, or the southern yellowjacket, is a social wasp. This species can be identified by its distinctive black and yellow patterning and orange queen. This species is typically found in eastern North America, and its territory extends as far south as Central America. Within these territories, they create enormous, multiple-comb nests. The colonies may be either annual or perennial depending on the climate, and in many perennial nests, polygyny takes place. In addition, this species uses pheromones both as a sexual attractant and an alarm signal. This species feeds on insects and animal carcasses; it does not produce honey. V. squamosa, a social insect, has developed a parasitic relationship with the species V. vidua and V. maculifrons. Due to their painful, venomous stings, the species is considered a pest.
Brachygastra lecheguana, formerly known as Nectarina lecheguana, is a species of dark paper wasp found across North and South America. It nests in underbrush in grassland-type environments, and produces honey, characteristic of the genus Brachygastra.
Vespula atropilosa, also known as the prairie yellowjacket, is a black and yellow social wasp that forms annual colonies. Vespula atropilosa was formerly a member of the Vespa family. Males have either xanthic (yellow) or melanic (black) abdominal coloring. The prairie yellowjacket can be found in the Western and Midwestern United States as well as parts of southern Canada. It builds its nests underground and prefers large open areas such as pastures and golf courses. Vespula atropilosa colonies are founded by a queen in the spring and grow most during mid-summer. It preys on other insects such as flies and grasshoppers but is not a scavenger like other wasps. Queens mate with multiple males, and males will fight each other for matings. V. atropilosa is a social wasp that practices altruism. Prairie yellowjackets are not considered pests but are commonly found in backyards in the Pacific Northwest. This species derives its common name from the prairies and grasslands where it can be found.
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.
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.
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.
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