| Augochloropsis | |
|---|---|
 | |
| Augochloropsis anonyma | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Hymenoptera |
| Family: | Halictidae |
| Subfamily: | Halictinae |
| Tribe: | Augochlorini |
| Genus: | Augochloropsis Cockerell, 1897 |
| Diversity | |
| at least 140 species | |
Augochloropsis is a genus of brilliant metallic, often blue-green, sweat bees in the family Halictidae. [1] There are at least 140 described species in Augochloropsis. [2] [3] [4] [5]
Species of the genus Augochloropsis are generally between 8 and 12 mm long and metallic, typically bright green or blue in color, with some exceptions such as gold, red, or purple. [6]
Augochloropsis species can be differentiated from other Augochlorini at the genus level by the tegulae that are punctate, D-shaped, and bent inwards. [7] [8]
The genus Augochloropsis is restricted to the New World, and the vast majority of species are found in the tropical and subtropical regions. [9] Three Augochloropsis species are found in the temperate regions of North America ( A. anonyma, A. metallica , and A. sumptuosa [9] ), but no species have managed to successfully exploit niches present in the subarctic zone. [10]
Augochloropsis nests begin with one long main burrow, dug out of soft ground, that extends straight down. This main burrow has a lateral burrow that extends outward horizontally, perpendicular to the main. Cells all hang vertically down from this one lateral burrow, a sort of clustering that is common for all genera in the tribe Augochlorini. Aside from this, the overall structure of one main burrow and one lateral burrow is considered unique within the tribe. [11]
A broad spectrum of social behaviors have been observed in the tropical Augochloropsis species. These range from solitary, to communal, semisocial, and even eusocial nesting behavior. [12] A few faunal studies have looked at North American species as well. A. sumptuosa has been studied in New Jersey and Kansas and has been found to be either communal or semisocial. Some species have been observed to nest in aggregations, where the openings of several nests are located within just centimeters of each other. [13]
Some evidence of division of labor or partitioning of social roles to some extent has been observed within this genus. An excavated nest of A. metallica in Michigan led to the discovery of two female nest-mates with different levels of ovarian development that were determined not to be due simply to the age of the individuals. This was interpreted as strongly indicative of division of labor within this species, suggesting at least that individuals have varying levels of reproductive responsibility within a nest. This may be a larger pattern found within the social species of this genus. [12]
There is a large amount of behavioral variability observed within augochlorine bees. Species within this tribe can also display polyethism, or differences in sociality and work activity among different members of a species. [12] Unlike certain species that may be reliably eusocial or reliably solitary, members of Augochloropsis show behavioral plasticity.
Augochloropsis are classified as polylectic, [14] a term which indicates that these species are broad generalists that collect pollen from multiple families of plants. [15] Certain life history traits of bees are actually known to predict polylecty, including social lifestyles, long windows of adult activity, and producing more than two generations of offspring a year. Some of these traits are often seen in different Augochloropsis species. [15] For example, Augochloropsis anonyma adults are active between April and September in the northern portion of its range and year-round within its range in southern Florida. [6] Having this long window of activity makes this species more likely to forage from a large number of different plant taxa. Another species, Augochloropsis iris, which is native to South America, is primitively eusocial, and engages in three rounds of brood production over the course of a year, which correspond to the traits listed above that often promote wider diet breadth. [16]
All three Augochloropsis species found in the United States have recorded floral associations with Hypericum . [6]
Additionally, Augochloropsis anonyma has been recorded in association with Baccharis, Bidens, Cirsium, Erigeron, Helenium, Ilex, Linaria, Melilotus, Metopium, Ocimum, Polygonurn, Pycnanthemum, Rhus, Rubus and Trifolium . [6] Augochloropsis sumptuosa has been associated with Asclepias, Berlandiera, Bidens, Clethra, Crataegus, Eriogonum, Eryngium, Helianthus, Melilotus, Silphium, Stachys and Vaccinium . [6]
Augochloropsis metallica has the largest recorded floral associations of the 3 North American temperate species, with 73 floral records for the subspecies A. metallica metallica and 17 floral records for the subspecies A. metallica fulgida. [6] Floral records common between the two subspecies of A. metallica include Aster, Chrysanthemum, Cornus, Eryngium, Geranium, Ilex, Rhus, Rubus, and Solidago . [6]
Brood parasitism by mutillid wasps ( Sphinctopsis sp.) have been documented in Augochloropsis iris nests. [16] [13] While guards appear to deter invasion by mutillid wasps, they are not completely effective at preventing parasitism by these wasps. [16]
Members of the fly family Phoridae have been documented parasitizing Augochloropsis iris as well. However, members of Phoridae have only been documented parasitizing the nests of solitary females, indicating that the presence of guards at the entrances of multi-female nests are effective at preventing parasitism. [16]
Strepsipterans have been documented parasitizing Augochloropsis iris. [16]
Ants have been documented invading and removing cell contents from the nests of Augochloropsis iris. [16]
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.
Halictidae is the second-largest family of bees with nearly 4,500 species. They are commonly called sweat bees, as they are often attracted to perspiration. Halictid species are an extremely diverse group that can vary greatly in appearance. These bees occur all over the world and are found on every continent except Antarctica. Usually dark-colored and often metallic, halictids are found in various sizes, colors and patterns. Several species are all or partly green and a few are red, purple, or blue. A number of them have yellow markings, especially the males, which commonly have yellow faces, a pattern widespread among the various families of bees. The family is one of many with short tongues and is best distinguished by the arcuate basal vein found on the wing. Females in this family tend to be larger than the males. They are the group for which the term 'eusocial' was first coined by entomologist, Suzanne Batra.
Halictus rubicundus, the orange-legged furrow bee, is a species of sweat bee found throughout the Northern Hemisphere. H. rubicundus entered North America from the Old World during one of two main invasions of Halictus subgenera. These invasions likely occurred via the Bering land bridge at times of low sea level during the Pleistocene epoch.
Lasioglossum malachurum, the sharp-collared furrow bee, is a small European halictid bee. This species is obligately eusocial, with queens and workers, though the differences between the castes are not nearly as extreme as in honey bees. Early taxonomists mistakenly assigned the worker females to a different species from the queens. They are small, shiny, mostly black bees with off-white hair bands at the bases of the abdominal segments. L. malachurum is one of the more extensively studied species in the genus Lasioglossum, also known as sweat bees. Researchers have discovered that the eusocial behavior in colonies of L. malachurum varies significantly dependent upon the region of Europe in which each colony is located.
The sweat bee genus Lasioglossum is the largest of all bee genera, containing over 1800 species in numerous subgenera worldwide. They are highly variable in size, coloration, and sculpture; among the more unusual variants, some are cleptoparasites, some are nocturnal, and some are oligolectic. Most Lasioglossum species nest in the ground, but some nest in rotten logs.
The genus Agapostemon is a common group of Western Hemisphere sweat bees.
Eusociality is the highest level of organization of sociality. It is defined by the following characteristics: cooperative brood care, overlapping generations within a colony of adults, and a division of labor into reproductive and non-reproductive groups. The division of labor creates specialized behavioral groups within an animal society, sometimes called castes. Eusociality is distinguished from all other social systems because individuals of at least one caste usually lose the ability to perform behaviors characteristic of individuals in another caste. Eusocial colonies can be viewed as superorganisms.
Eusociality evolved repeatedly in different orders of animals, notably termites and the Hymenoptera. This 'true sociality' in animals, in which sterile individuals work to further the reproductive success of others, is found in termites, ambrosia beetles, gall-dwelling aphids, thrips, marine sponge-dwelling shrimp, naked mole-rats, and many genera in the insect order Hymenoptera. The fact that eusociality has evolved so often in the Hymenoptera, but remains rare throughout the rest of the animal kingdom, has made its evolution a topic of debate among evolutionary biologists. Eusocial organisms at first appear to behave in stark contrast with simple interpretations of Darwinian evolution: passing on one's genes to the next generation, or fitness, is a central idea in evolutionary biology.
Within the insect order Hymenoptera, the Halictinae are the largest, most diverse, and most recently diverged of the four halictid subfamilies. They comprise over 2400 bee species belonging to the five taxonomic tribes Augochlorini, Thrinchostomini, Caenohalictini, Sphecodini, and Halictini, which some entomologists alternatively organize into the two tribes Augochlorini and Halictini.
Lasioglossum zephyrus is a sweat bee of the family Halictidae, found in the U.S. and Canada. It appears in the literature primarily under the misspelling "zephyrum". It is considered a primitively eusocial bee, although it may be facultatively solitary. The species nests in burrows in the soil.
Halictus ligatus is a species of sweat bee from the family Halictidae, among the species that mine or burrow into the ground to create their nests. H. ligatus, like Lasioglossum zephyrus, is a primitively eusocial bee species, in which aggression is one of the most influential behaviors for establishing hierarchy within the colony, and H. ligatus exhibits both reproductive division of labor and overlapping generations.
Megalopta genalis is a nocturnal species of the family Halictidae, otherwise known as the sweat bees. The bee is native to Central and South America. Its eyes have anatomical adaptations that make them 27 times more sensitive to light than diurnal bees, giving it the ability to be nocturnal. However, its eyes are not completely different from other diurnal bees, but are still apposition compound eyes. The difference therefore lies purely in adaptations to become nocturnal, increasing the success of foraging and minimizing the danger of doing so from predation. This species has served as a model organism in studies of social behavior and night vision in bees.
Lasioglossum cressonii is a species in the sweat bee genus Lasioglossum, family Halictidae. Halictidae exhibit eusocial hierarchy behavior which is interesting given that eusociality in this group is hard to evolve and easy to lose. L. cressonii is found throughout North America. L. cressonii have been shown to be important pollinators for apple trees and many other North American native plants.
Lasioglossum vierecki, also known as Dialictus vierecki and Halictus vierecki, is a sand sweat bee and is part of the family Halictidae of the order Hymenoptera. It is found in the eastern half of North America from Minnesota to the New England States down to Georgia and Louisiana and up in Manitoba and Ontario. Commonly found in sandy areas, it pollinates various flowers such as grass-leaved goldenrod and rattlesnake master.
Lasioglossum figueresi, formerly known as Dialictus figueresi, is a solitary sweat bee that is part of the family Halictidae of the order Hymenoptera. Found in Central America, it nests in vertical earthen banks which are normally inhabited by one, though sometimes two or even three, females. Females die before their larvae hatch. It was named after José Figueres Ferrer, a famous Costa Rican patriot, and studies of its behavior are now general models for social behavior studies.
Augochlorella is a genus in the bee family Halictidae, commonly called sweat bees. They display metallic coloration, ranging from reddish to gold to bluish green, as is typical for other genera in the tribe Augochlorini.
Halictus confusus, the southern bronze furrow bee or confused sweat bee, is a species of sweat bee in the family Halictidae. It is a primitively eusocial bee species found in open habitats in Eurasia and North America.
Augochloropsis metallica or Metallic epauletted-sweat bee is a brilliant green species of sweat bee in the family Halictidae. Their native range encompasses Central America and extends into parts of North America, where they are commonly found in regions such as the Midwest, Northeast, and the Southern United States.
Augochlorella aurata is a primitively eusocial species of sweat bee in the family Halictidae. It is one of three species of Augochlorella found east of the Rocky Mountains in North America. The body is a brilliant green metallic color, diffused to varying extents with a copper, red, or yellow color. A. aurata is a generalist pollen feeder and likely an important pollinator for some horticultural crops. A common name is golden green sweat bee.
Megalopta is a widespread neotropical genus of bees in the tribe Augochlorini in family Halictidae, known as the sweat bees. They are the largest of the five nocturnal genera in Augochlorini. Most have pale integumentary pigmentation, and all have large ocelli, most likely a feature of their nocturnal behavior. They live in tropical Central America and the entirety of South America. The subgenus Noctoraptor is cleptoparasitic. They are not known from the fossil record.
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