(n.) The organ with which many insects and some other animals deposit their eggs. Some ichneumon files have a long ovipositor fitted to pierce the eggs or larvae of other insects, in order to lay their own eggs within the same.
Example Sentences:
(1) Unfertilized eggs of the rose bitterling (Rhodeus ocellatus ocellatus) were squeezed out of females that had an elongated ovipositor and were dechorionated mechanically with fine forceps in physiological saline.
(2) He stared not at the twitching Petrobras P36 with its concrete in the mere, not at its drill ovipositor injecting slippy black rig eggs into England, but at the sea.
(3) To continuously monitor ovipositor movements a new actograph was devised; it was composed of a radioelement glued at the ventral tip of the ovipositor, a scintillation probe to detect ovipositor movements and a microcomputer to store and process data.
(4) Sensilla on legs and ovipositor of the moth Ostrinia nubilalis were investigated by light and scanning electron microscopy.
(5) Electrical recordings from the ovipositor nerves in the isolated nervous system showed spontaneous rhythmical bursting activity.
(6) The eighth and ninth segmental nerves of the terminal abdominal ganglion supply the ovipositor muscles.
(7) In females, the overall structure of the ovipositor appeared flaccid, less sclerotized, and misshapen.
(8) Two model proctolinergic systems are highlighted: motor control of the visceral muscles of the locust oviduct and of the skeletal muscles of the locust ovipositor.
(9) Rhythmical ovipositor movements are produced by the severed abdomen of sexually mature female grasshoppers.
(10) On the basis of a comparative morphological and embryological analysis the author concludes that lower mammals (ovipositors and marsupials) and higher mammals should not be united into a single class.
(11) The little known species, which are redescribed in detail with the illustration of the male genitalia and female ovipositors, and the key, which is revised to the genera and species, are also presented in this paper.
(12) The form of the female ovipositor indicates that other species of Chathamidae utilize starfish species as oviposition hosts.
(13) The female reproductive system consists of bursa copulatrix, ductus bursae, receptaculum seminis, paired ducti receptaculi, ovaries, oviducts, one chorion gland, ovipositor, and oviporus.
(14) The removal of the ovaries did not prevent the onset of ovipositor movements.
(15) The ovipositor is composed of two papillae densely packed with medium length mechanoreceptor sensilla (MRb: 80-160 microns, n = 420-460).
(16) Two classes should be distinguished: 1) lower mammals including modern ovipositor animals and marsupial animals and fossilized Multituberculata, Triconodonta, Symmetrodonta and Pantotheria; and 2) higher mammals or placental animals.
(17) Accumulation of pasture ticks Dermacentor marginatus has been discovered in the wool of sheep, 5-6 cm from the skin surface, the temperature in those sites being permanent 18-20 degrees C. The ticks died either in the course or following ovipositor.
(18) The ovipositor appendages of acridid insects (grasshoppers and locusts) consist of two pairs of shovel-shaped valves that are used to dig a deep chamber in the ground for egg burial, to manipulate the eggs, and to assist in capping the egg-pod with froth.
(19) The hanging ovipositor profile identified an ovipositionally spent female.
(20) It has been established that the first ovipositor was only from autogenically developed oocysts.
Sawfly
Definition:
(n.) Any one of numerous species of hymenopterous insects belonging to the family Tenthredinidae. The female usually has an ovipositor containing a pair of sawlike organs with which she makes incisions in the leaves or stems of plants in which to lay the eggs. The larvae resemble those of Lepidoptera.
Example Sentences:
(1) The R-receptor of the solitary bee Callonychium petuniae is based on a pigment (P596) with a long lambda max, whereas in the sawfly Tenthredo campestris the G-receptor appears to act as filter to a pigment (P570), shifting its lambda max value to a longer wavelength and narrowing its bandwidth.
(2) 3,7-Dimethylpentadecan-2-ol was identified as the free alcohol in three species from two genera of pine sawflies (Hymenoptera: Diprionidae).
(3) A reduction in the sawfly-induced liver pathology as a consequence of the concurrent F. hepatica infection was also noted.
(4) Larvae of the sawfly Neodiprion sertifer (Hymenoptera: Diprionidae), when disturbed, discharge an oily oral effluent essentially identical chemically to the terpenoid resin of its host plant (Pinus sylvestris).
(5) In contrast, sawfly-dosed, fluke-infected lambs exhibited only moderate clinico-pathological signs of sawfly poisoning and no deaths occurred.
(6) Lophyrotomin was previously isolated from Lophyrotoma interrupta sawfly larvae in Australia.
(7) Whole ovaries of the sawfly, Acantholyda nemoralis Thoms., Tenthredinidae, Hymenoptera, were cultivated by the organ culture technique of Fell in the medium of Jones and Cunningham modified by doubling the contents of salts, sugars and lactalbumin hydrolysate and supplemented with an addition of folate.
(8) Possible factors responsible for the antagonistic effect of F. hepatica infection on sawfly poisoning in lambs are discussed.
(9) Larvae of the European birch sawfly Arge pullata were shown to contain lophyrotomin, an octapeptide liver toxin containing four D-amino acids.
(10) Electroantennographic and single sensillum recordings were performed on male pine sawfly, Neodiprion sertifer, antennae.
(11) Improved control by advice on property management and a better knowledge of the population dynamics of the sawfly was suggested.
(12) The rumen and gut contained many larvae of the blue-black birch sawfly (Arge pullata).
(13) In a search for a region of DNA that will clarify the interordinal relationships we sequenced approximately 1080 nucleotides of the 5' end of the 18S ribosomal RNA gene from representatives of 14 families of insects in the orders Hymenoptera (sawflies and wasps), Neuroptera (lacewing and antlion), Siphonaptera (flea), and Mecoptera (scorpionfly).
(14) The pheromone perception system encountered in male pine sawflies thus differs clearly from that observed in moths.
(15) In the experimental conditions the sawfly ovary survived for several days showing mitoses in the follicular epithelium.
(16) Clinico-pathological observations on sawfly-dosed, fluke-free lambs revealed the characteristic picture of sawfly poisoning.
(17) A comparison was made on the properties of the inclusion body proteins of two insect viruses: the nucleopolyhedrosis viruses of the European pine sawfly, Neodiprion sertifer, Geoffroy, and the gypsy moth, Lymantria dispar, Linnaeus.
(18) Lambs harbouring an 8-week-old infection with Fasciola hepatica, together with fluke-free animals, were dosed orally with 2 g per kg body weight of sawfly larvae (Arge pullata).
(19) Responses to trans-perillenal, a monoterpene identified in female gland extracts and to (2S, 3S, 7S)-diprionyl propionate (SSS:OPr), a field attractant for N. sertifer and some related sawfly species were also recorded.
(20) A postal survey of cattle producers in the Maranoa, Warrego and Leichhardt districts of Queensland where poisoning of cattle by larvae of the sawfly (Lophyrotoma interrupta) occurs was carried out in 1982 with 179 replies (64% of those contacted).