name = Hymenoptera
image_width = 240px
image_caption = female "
ordo = Hymenoptera
ordo_authority = Linnaeus, 1758
Hymenoptera is one of the larger orders of
insects, comprising the sawflies, wasps, bees, and ants. The name refers to the membranous wings of the insects, and is derived from the Ancient Greek (humẽn): membrane and (pteron): wing. The hindwings are connected to the forewings by a series of hooks called hamuli.
Females typically have a special
ovipositorfor inserting eggs into hosts or otherwise inaccessible places. The ovipositor is often modified into a stinger. The young develop through complete metamorphosis — that is, they have a worm-like larval stage and an inactive pupal stage before they mature. (See holometabolism.)
Hymenoptera originated in the
Triassic, the oldest fossils belonging to the family Xyelidae.Social hymenopterans appeared during the Cretaceous. The evolution of this group has been intensively studied by A. Rasnitsyn, M. S. Engel, G. Dlussky, and others.
Among the hymenopterans, sex is determined by the number of
chromosomes an individual possesses. Fertilized eggs get two sets of chromosomes (one from each parent's respective gametes), and so develop into diploidfemales, while unfertilized eggs only contain one set (from the mother), and so develop into haploidmales; the act of fertilization is under the voluntary control of the egg-laying female. This phenomenon is called haplodiploidy. Note, however, that the actual genetic mechanisms of haplodiploid sex determination may be more complex than simple chromosome number. In many Hymenoptera, sex is actually determined by a single gene locus with many alleles. In these species, haploids are male and diploids heterozygous at the sex locus are female, but occasionally a diploid will be homozygous at the sex locus and develop as a male instead. This is especially likely to occur in an individual whose parents were siblings or other close relatives. Diploid males are known to be produced by inbreeding in many ant, bee and wasp species.
One consequence of haplodiploidy is that females on average actually have more genes in common with their sisters than they do with their own daughters. Because of this, cooperation among kindred females may be unusually advantageous, and has been hypothesized to contribute to the multiple origins of
eusocialitywithin this order.
Symphytaincludes the sawflies, horntails, and parasitic wood wasps. The group may be paraphyletic, as it has been suggested that the family Orussidaemay be the group from which the Apocrita arose. They have an unconstricted junction between the thorax and abdomen, and the larvae of free-living forms are herbivorous, have legs, prolegs (on every segment, unlike Lepidoptera( butterfliesand moths)), and ocelli.
The wasps, bees, and ants together make up the suborder
Apocrita, characterized by a constriction between the first and second abdominal segments called a wasp-waist (petiole), also involving the fusion of the first abdominal segment to the thorax. Also, the larvae of all Apocrita do not have legs, prolegs, or ocelli.
* [http://www.forum.hymis.de/ Hymenoptera Forum] German and International
* [http://www.hymis.eu/fotos/topical/topical.php?nav1=topical Hymenoptera Information System] (German)
* [http://www.cirrusimage.com/hymenoptera.htm Hymenoptera of North America - large format reference photographs, descriptions, taxonomy]
* [http://www.hymenopterists.org/ International Society of Hymenopterists]
* [http://www.bwars.com/ Bees, Wasps and Ants Recording Society] (UK)
* [http://www.lasius.narod.ru/ Ants Photo Gallery] (RU)
* [http://palaeoentomolog.ru/english.html Fossil insects in Russia]
* [http://fossilinsects.net/index.html International Palaeoentomological Society]
* [http://www.sel.barc.usda.gov/selhome/sphecos/sph30ttl.htm Sphecos Forum for Aculeate Hymenopterra]
* [http://morphbank.net/Browse/ByImage/index.php?keywords=&tsnKeywords=hymenoptera&spKeywords=&viewKeywords=whole+body&localityKeywords=&listField1=imageId&orderAsc1=DESC&listField2=&orderAsc2=ASC&listField3=&orderAsc3=ASC&numPerPage=20&goTo=&resetOffset=&activeSubmit=2 Hymenoptera images on MorphBank, a biological image database]
* [http://hymenoptera.ucr.edu Hymenopteran Systematics]
* [http://www.ufrrj.br/institutos/ib/ento/tomo11.pdf Insetos do Brasil]
* [http://www.landcareresearch.co.nz/research/biosystematics/invertebrates/hymenoptera/ New Zealand Hymenoptera]
* [http://www.waspweb.org/Afrotropical_wasps/index.htm Waspweb]
AfrotropicalHymenoptera Excellent images
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Hymenoptera — Hy me*nop te*ra, n. pl. [NL., fr. Gr. ? membrane winged; ? skin, membrane + ? wing.] (Zo[ o]l.) An extensive order of insects, including the bees, ants, ichneumons, sawflies, etc. [1913 Webster] Note: They have four membranous wings, with few… … The Collaborative International Dictionary of English
Hymenoptĕra — Hymenoptĕra, so v.w. Hautflügler … Pierer's Universal-Lexikon
Hymenoptera — Hymenoptera, Hautflügler, mehr als 100000 Arten umfassende Ordnung der Insekten; Unterklasse ⇒ Pterygota. Große Facettenaugen, drei Punktaugen; fadenförmige Fühler mit unterschiedlicher Gliederzahl; Mandibeln stets als Beißwerkzeuge ausgebildet,… … Deutsch wörterbuch der biologie
Hymenoptera — order of insects that includes ants, wasps, and bees, 1773, coined in Modern Latin 1748 by Linnæus from Gk. hymen (gen. hymenos) membrane (see HYMEN (Cf. hymen)) + pteron wing (see PETITION (Cf. petition)). Related: Hymenopterous … Etymology dictionary
Hymenoptera — Hyménoptères … Wikipédia en Français
Hymenoptera — «Himenóptero» redirige aquí. Para el cortometraje de 1992, véase Himenóptero (corto). Hymenoptera … Wikipedia Español
Hymenoptera — Hautflügler Westliche Honigbiene (Apis mellifera) Systematik Unterstamm: Tracheentiere (Tracheata) … Deutsch Wikipedia
Hymenoptera — noun an order of insects including: bees; wasps; ants; ichneumons; sawflies; gall wasps; etc. • Syn: ↑order Hymenoptera • Derivationally related forms: ↑hymenopterous • Hypernyms: ↑animal order … Useful english dictionary
Hymenoptera — … Википедия
Hymenoptera — An order of insects, including bees, wasps, and ants, characterized by locked pairs of membranous wings and high development of social or colonial behavior. [G. hymen, membrane, + pteron, wing] * * * Hy·me·nop·tera .hī mə näp tə rə n pl an order… … Medical dictionary