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The Vespidae are a large (nearly 5000 species), diverse, cosmopolitan family of , including nearly all the known eusocial wasps (such as Polistes fuscatus, Vespa orientalis, and Vespula germanica) 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 (also true of some stenogastrines). 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.Beggs, Jacqueline R., Eckehard G. Brockerhoff, Juan C. Corley, Marc Kenis, Maité Masciocchi, Franck Muller, Quentin Rome, and Claire Villemant. "Ecological effects and management of invasive alien Vespidae." BioControl 56 (2011): 505-526.Beggs, J. "The ecological consequences of social wasps (Vespula spp.) invading an ecosystem that has an abundant carbohydrate resource." Biological Conservation 99, no. 1 (2001): 17-28.
The subfamilies Polistinae and Vespinae are composed solely of eusocial species, while the Eumeninae, Euparagiinae, Gayellinae, Masarinae and Zethinae are all with the exception of a few communal and several subsocial species. The Stenogastrinae are facultatively eusocial, considering nests may have one or several adult females; in cases where the nest is shared by multiple females (typically, a mother and her daughters) there is reproductive division of labor and cooperative brood care.PK Piekarski, JM Carpenter, AR Lemmon, E Moriarty-Lemmon, BJ Sharanowski. (2018) Phylogenomic Evidence Overturns Current Conceptions of Social Evolution in Wasps (Vespidae). Molecular Biology and Evolution. 35:2097-2109.
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In the Polistinae and Vespinae, rather than consuming prey directly, prey are Premastication and fed to the larvae, which in return, produce a clear liquid (with high amino acid content) for the adults to consume; the exact amino acid composition varies considerably among species, but it is considered to contribute substantially to adult nutrition.
Fossils are known since Aptian of the Early Cretaceous, with several described species from Cretaceous amber.
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