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Topic: Ovipositor


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In the News (Wed 19 Jun 19)

  
  Ovipositor
The ovipositor is an organ used by some of the arthropods to deposit their eggs.
It is used by the grasshoppers to force a burrow in the earth to receive the eggs and by cicadas to pierce the wood of twigs for a similar purpose.
Some roach[?]-like fish have an ovipositor as a tubular extension of the genital orifice in the breeding season for depositing eggs in the mantle cavity of the pond mussel.
www.ebroadcast.com.au /lookup/encyclopedia/ov/Ovipositor.html   (224 words)

  
 Orthoptera of the Northern Great Plains
Male: cercus with uncinate, acute inner tooth; female: ovipositor subequal to length of hind femur.
Cercus length proximad of inner tooth subequal to length from inner tooth to apex; ovipositor curved, length < hind femur.
Ovipositor blade-like, upturned, rounded apically with serrate edges.
www.ndsu.nodak.edu /entomology/hopper/katydids.htm   (573 words)

  
 Ovipositor - Wikipedia, the free encyclopedia
The ovipositor is an organ used by some of the arthropods for oviposition, i.e.
Some Roach-like fish, such as bitterlings, have an ovipositor as a tubular extension of the genital orifice in the breeding season for depositing eggs in the mantle cavity of the pond mussel.
The BBC documentary Walking with Dinosaurs portrayed a diplodocus mother using an ovipositor to lay her eggs, but it was pure speculation on the documentary's part.
en.wikipedia.org /wiki/Ovipositor   (327 words)

  
 JIS: Tschinkel 2.12.2002   (Site not responding. Last check: 2007-09-10)
Ovipositor morphology and various sensilla on the tip and along the ovipositor were studied by scanning electron microscopy and their possible function discussed.
The only studies on trichopteran ovipositors using SEM were done by Spinelli Batta and Moretti (1997) and Alecke (1998), but they only described the location and shape of the sensilla on the ovipositors without discussing their possible function.
Anderson P, Hallberg E. Structure and distribution of tactile and bimodal taste/tactile sensilla on the ovipositor, tarsi and antennae of the flour moth, Ephestia kuehniella (Zeller) (Lepidoptera: Pyralidae).
digital.library.arizona.edu /insect/3.12   (3978 words)

  
 The Amazing Ichneumon
The megarhyssa is able to retract some of its ovipositor in a loop within an expandable sac at the end of its tail.
The ovipositor did not seem to follow a crack in the wood, but looked like it had been inserted directly into the tree.
The ovipositor ended in a tunnel that appeared to be a larval tunnel of a horntail fly.
mdc.mo.gov /conmag/2002/05/30.htm   (1230 words)

  
 Encyclopedia Bugtannica: Giant Ichneumon Wasp   (Site not responding. Last check: 2007-09-10)
Although the ovipositor of the giant ichneumon wasps is quite long, don't let it intimidate you -- these wasps do not have poison glands like other stinging Hymenoptera and they are not inclined to stab you with it either.
Her drilling organ moves in a circular motion, supported by two slender guides that separate from the ovipositor and form an expanding loop as the ovipositor penetrates deeper into the solid wood.
When the ovipositor is fully inserted into the wood it touches a host larva and she then lays an egg through a narrow gap in the ovipositor.
members.aol.com /yesclub2/blichneumon.html   (568 words)

  
 General overview of the Hymenoptera
Instead, they have an egg laying structure (ovipositor); in many species, the ovipositor is sawlike and is used to cut open plant tissue and lay eggs inside.
Instead of the saw-like ovipositor of the sawflies, however, parasitic wasps have a needle-like one, used to pierce the outer shell ("cuticle") of host insects or other surfaces such as seed casings.
In many cases, the ovipositor injects venom, that stuns the host, and/or other substances which defeat the host's immune reaction to the inserted egg or eggs.
www.sel.barc.usda.gov /hym/overview.html   (1230 words)

  
 Family TORYMIDAE
Unfortunately at least a few species in almost all other families of chalcidoids have exserted ovipositor sheaths, so that care must be taken when using this character alone.
A character that also works well in female torymids, but is not always readily visible, is that the cerci of the last tergum are exserted, being longer than wide, and a small flap (epipygium) is present at the posterior margin of the tergum.
Male torymids are generally less easily separated than females (because they lack the obvious ovipositor), but the relatively short stigmal vein and exserted cerci are often enough to distinguish these from specimens of other families.
www.sel.barc.usda.gov /hym/chalcids/Torymid.html   (800 words)

  
 Tegeticula yuccasella Complex Key
Keel on ovipositor >0.06 mm, signa > 1.2 mm in diameter......................................................
Ovipositor keel 0.07-0.09 mm in height, signa 1.3-1.7 mm in diameter; hindwings uniformly brown or dark brown or grey with darker apical region......................................................................................................................
Serrated ovipositor keel 0.030-0.035 mm in height, half that of ovipositor diameter....
tolweb.org /notes/?note_id=433   (591 words)

  
 Ovipositor   (Site not responding. Last check: 2007-09-10)
The morphology of the ovipositor is extremely varied among insects - they may be short or long, thin or thick, blunt or sharp.
One of the most interesting modifications of the ovipositor is found in stinging Hymenoptera, where the ovipositor is not used to lay eggs at all but is instead modified into a stinger.
The venom is ejected at the tip of the stinger and the eggs are laid from a genital chamber which is located at the base of the ovipositor.
bugs.bio.usyd.edu.au /Entomology/externalMorphology/imagePages/ovipositor.html   (156 words)

  
 Local Live | San Francisco Bay Guardian
And he'll open Ovipositor's late-August show as part of the duo 28 Minutes of Noise, which plans to live up to its name down to the last second.
The gallery's owners are thrilled with the huge new space, but the transformation from a closed-down restaurant to a hip gallery and club is still in its infancy.
Cramped and dark, it was like a show in a buddy's parents' basement – except for the beckoning alcohol in the next room, of course.
www.sfbg.com /39/46/x_local_live.html   (757 words)

  
 Florida Entomologist, v. 82, n. 2, p. 362
Ovipositor withdrawn from egg mass to the edge of the transparency film and held at approximately 9% angle to horizontal edge of transparency film.
After each egg was discharged females probed with the end of the ovipositor to position the next egg directly on top of the previous egg.
Similarly, the ovipositor was used to locate the perimeter of the egg mass to deposit the upper and lower portions of the adhesive liquid.
www.fcla.edu /FlaEnt/fe82p362.htm   (1167 words)

  
 What's That Bug: Ichneumons
Not knowing what this bug was and mistaking its ovipositor for a monstrous stinger, she screamed, tripped and fell, wet herself (luckily she had a pair of extra pants downstairs), and continued screaming, drawing a small crowd of concerned coworkers who gathered at the bottom of the stairway to the mezzanine.
She uses the ovipositor to deposit her eggs in the burrows of wood boring insects, the larval food source.
That long "stinger" is in fact her ovipositor, and she locates wood boring grubs inside trees with her acute hearing, and penetrates the wood with the ovipositor, depositing an egg near the living grub.
www.whatsthatbug.com /ichneumons.html   (5830 words)

  
 A Guide To Orthoptera
The ovipositor is not visible, and eggs are usually laid in a purse-like ootheca, an egg case produced in the female's reproductive system.
Both the one-segmented cerci and the ovipositor are short.
Ovipositor laterally flattened, either long and sword-like or short and curved, sickle-like.
entomology.unl.edu /tmh/ent115/labs/orthoptera.htm   (778 words)

  
 Ichneumonidae
Ovipositor extending beyond apex of abdomen with a subapical dorsal notch and without evident transverse ridges on lower valve.
Ovipositor nearly always longer than apical depth of abdomen, usually extending beyond apex of abdomen by about half the length of abdomen.its tip usually with a distinct nodus, without a subapical dorsal notch, ridges on its lower valve nearly always numerous and distinct
Ovipositor nearly always a little shorter than apical depth abdomen, with a subapical dorsal notch and without distinct ridges on lower valve.
bitkikorumamuzesi.netfirms.com /ichneumonidae_anahtar.htm   (1523 words)

  
 Giant Ichneumon Wasps Ovipositing
Each sex does so for a different reason; females are 'listening' for wood boring larvae of the horntail wasps (hymenopteran family Siricidae) upon which to lay eggs, males are listening for newly emerging females with which to mate.
The ovipositor itself consists of a hollow central tube through which the eggs are passed, and two slender 'guides' which separate from the tube and form two expanding loops on either side of the abdomen as drilling progresses.
When the wasp senses the tip of the ovipositor in contact with the host larva, she injects the egg through the hollow tube.
cirrusimage.com /hymenoptera_ichneumon_megarhyssa_fem.htm   (456 words)

  
 UMCE Blueberry Maggot Fact Sheet
The female fly punctures the skin of the blueberry with a long, pointed structure called the ovipositor, which can be withdrawn into the insect's abdomen.
Once the ovipositor is in the berry, a single white elongate egg is deposited.
The fly then drags the ovipositor over the surface of the berry leaving behind a chemical called an ovipositing-deterring pheromone.
pmo.umext.maine.edu /bluberry/BlueMaggot.htm   (1037 words)

  
 What's That Bug: Horntails, Wood Wasps and Sawflies
She uses the ovipositor, that appears to be a stinger, to deposit eggs deep in dead and dying wood.
That ovipositor is used to deposit eggs in trunks of trees where the grubs tunnel and feed.
The portruding tail is a female's ovipositor, and she uses it to deposit eggs under bark so the wood boring larvae will have a food source.
www.whatsthatbug.com /sawflies.html   (4623 words)

  
 Ovipositor - Wikipedia
Een ovipositor is de legbuis van een insect, en wordt ook wel legboor genoemd.
Vaak wordt de legbuis door de leek aangezien voor angel, terwijl het eigenlijk eerder een geslachtsorgaan is. De functies voor een ovipositor zijn eigenlijk hetzelfde, de eieren moeten ergens 'diep' in gestopt worden.
Een ovipositor moet niet verward worden met zoals gezegd de angel; hoewel het vermoeden bestaat dat de angel uit de ovipositor is ontstaan.
nl.wikipedia.org /wiki/Ovipositor   (217 words)

  
 Notes on the biology of Dasypogon diadema (Diptera: Asilidae)
As soon as a female found a suitable place, she rapidly moved the ovipositor around, curled her abdomen under herself, and pushed the blunt ovipositor down into the soil (Fig.
The ovipositor was normally sunk to the full depth of the abdominal length less the first and second segments.
The tip of ovipositor therefore reached a depth of 10-13 mm at which time the female stiffened for 5 - 10 sec., with spread wings and legs.
www.geller-grimm.de /dasy08.htm   (307 words)

  
 Susanne Schulmeister's Homepage
In the basal groups of symphytans, the ovipositor (which is used for cutting into plants and laying eggs) is shaped like a saw, hence the name sawfly.
Parasitic Hymenoptera have very long ovipositors, which consist of an ovipositor blade and an ovipositor sheath, both of which are normally on the outside of the body.
In Orussoidea, however, the ovipositor blade is inside the body cavity and due to its enormous length loops through the abdomen and thorax, as shown in the figure below (ovipositor blade in red, body cavity in grey), after Vilhelmsen et al.
www.schulmeister.us /Symphyta.html   (985 words)

  
 File: <AGAONID
  The ovipositor sheath is distinctly exserted or not.
The Sycoryctinae are characterized only by the relatively typical chalcidoid wing venation, the long ovipositor of females, and the absence of attributes that are used to characterize the other agaonid subfamilies.
Apocrypta (Sycoryctinae) (Ulenberg 1983); Wiebes (1966a) studied the structure of the terminal metasomal terga and ovipositor of Sycophaginae and Sycoryctinae, and Copland et al.
faculty.ucr.edu /~legneref/taxonomy/agaonid.htm   (5847 words)

  
 eurosta biology page
The male is of slightly smaller size and lacks an ovipositor on the end of it's abdomen.
By wrapping the bud of a fly's non-host species with a leaf from the fly's host species, the researcher was able to trick the female fly into attempting to ovipuncture the bud.
However, once her ovipositor had penetrated the wrapper and touched the non-host bud, the female fly would reject the bud.
www.facstaff.bucknell.edu /abrahmsn/solidago/eurosta.html   (602 words)

  
 Genetic and environmental contributions to geographic variation in the ovipositor length of a cricket. - Ecology - ...
Genetic and environmental contributions to geographic variation in the ovipositor length of a cricket.
Author: Roff, Derek A. Females of many insects possess an ovipositor, which in crickets is usually used to place eggs deep into the soil.
Ovipositor length in female striped ground crickets (Allonemobius socius) increased at higher latitudes and altitudes in North America, despite an opposing trend in overall body size.
www.highbeam.com /doc/1G1-17097627.html   (172 words)

  
 SUB Göttingen - Dissertationen - Tousson Ehab: Neural processing of chemosensory information from the locust ...
Contact chemoreceptors (basiconic sensilla) located on the ovipositor and genital segments of the locust serve to control the chemical features of the substrate before and during oviposition.
The central nervous projections of their four chemosensory and one mechanosensory neurons from single basiconic sensilla were stained selectively, focussing on receptors on the ovipositor valves, which usually contact the substrate during the pre oviposition probing movements.
From the typical intersegmental projections of most primary afferents and from the lack of segregation into glomerular structures, it is concluded that integration of chemosensory information from the genital segments is distributed in the terminal and the 7th abdominal ganglion.
webdoc.sub.gwdg.de /diss/2001/tousson/index.html   (446 words)

  
 Florida Entomologist, v. 84, n. 4, p. 691
The ovipositor of Pseudacteon nudicornis Borgmeier from Jundiai (Fig.
The major differences are that the central extension of the ovipositor of flies collected south of Santa Fe is broader (about as long as wide) and the membranous filaments are parallel with the central extension and hooked downward at their terminus (Fig.
5 (3) Ovipositor short with the dorsal surface truncated and directed downward; with several stout hairs extending out under ovipositor, almost as long as the ovipositor; [Ovipositor curto com o dorso da região terminal truncado e ápice direcionado para baixo; vários pelos robustos quase tão longos quanto o ovipositor extendendo sob o ovipositor]; Fig.
www.fcla.edu /FlaEnt/fe84p691.html   (3131 words)

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