How To Use Arthropod In A Sentence
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The focus of this paper is on the Crustacea, the class of Arthropoda that expresses both hemoglobin and hemocyanin.
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The effect of predator, parasitoid, insect pest and neutral insect groups in the arthropod community in the weed habitat on the corresponding groups in the paddy habitat were varied.
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It is particularly common amongst arthropods and rotifers, and can also be found in some species of fish, amphibians, birds, and reptiles, but not in mammals.
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The focus of this paper is on the Crustacea, the class of Arthropoda that expresses both hemoglobin and hemocyanin.
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The next higher examples to be met are the frequently cited ants and bees, belonging to the lowly organized class of arthropoda, yet, through the advantage of association and mutual aid, developing actions and habits only found elsewhere in the human race.
Man And His Ancestor A Study In Evolution
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Now a team of paleontologists has found a fossilized arthropod they're betting is an early member of the subphylum Crustacea.
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As defined by Collins, Dinocarids are bilaterally symmetrical arthropods with a body divided into two principal tagmata, recalling the prosoma and opisthosoma of chelicerates, and a non-mineralised cuticle.
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Most biologists are familiar with only a few of the approximately 40 extant animal phyla such as annelids, arthropods, molluscs, echinoderms and chordates.
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There is not only one way, as is demonstrated by the compound eyes of arthropods.
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The 3in arthropod — part of the family including insects and spiders — has a segmented, flexible body and a large head.
The Sun
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To be useful, pesticides and repellents must work against not only mosquitoes but also other disease-transmitting arthropods.
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Both types of arthropods employ two short basal segments, coxa and trochanter, although the trochanter and femur are fused in some insects.
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In that time, the first undoubted fossil annelids, arthropods, brachiopods, echinoderms, molluscs, onychophorans, poriferans, and priapulids show up in rocks all over the world.
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A barnacle is a type of arthropod belonging to infraclass Cirripedia in the subphylum Crustacea, and is hence related to crabs and lobsters.
Gaea Times (by Simple Thoughts) Breaking News and incisive views 24/7
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Anopheles mosquitoes type of mosquitoes that may transmit malaria and rural filariasis arbovirus an arthropod-borne virus, i.e. a virus that is transmitted by insects, ticks or mites bilharziasis see: schistosomiasis cost-effectiveness analysis
Chapter 4
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Arthropods are bilaterally symmetrical protostomes with strongly segmented bodies.
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All species are sleek, raptorial predators, relying on fast locomotion (both in flight and on foot) and large mandibles to actively chase down a variety of arthropod prey.
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To measure food intake, we recorded mass of arthropods and fruit and reweighed the remaining food the following day to measure amount of food eaten during that 24-hour period.
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Tardigrades, close relatives of Onychophora and Arthropoda, possess ornamented armored exoskeletons in high predation marine environments.
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As in all arthropods, the eye surface had to be molted along with the rest of the hard exoskeleton.
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The team has so far recorded 100 different arthropod species, but Rust said they expect to find more, some of which are likely to be close relatives of animals in Africa and Madagascar.
Prehistoric creatures discovered in huge Indian amber haul
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Animal Behaviour that lerp is, in fact, as important to the fledglings 'growth as is the meatier arthropod prey supplied by their parents.
Signs of the Times
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Tarantulas, a group of spiders, belong to the family Theraphosidae of the phylum arthropoda.
Undefined
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Who knows what other microarthropods are lurking in the sand beneath, interstitial fauna inhabiting the chinks of the world.
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The advantage of an internal skeleton is that it allows the animal to grow much larger than is the case with the arthropod type exoskeleton.
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Over 45,000 arthropods were collected from 55 plants (5 plants from each of 11 sites), dominated numerically by Acari and Thysanoptera.
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Hemocyanins have been studied thoroughly only in the Chelicerata and the malacostracan Crustacea, but they have been identified in all arthropod subphyla, including the Myriapoda and Hexapoda.
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The more extensive and largely cryptogamic vegetation on the central peak had a poor fauna probably composed mainly of micro-arthropods.
Ascension scrub and grasslands
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If our mothers turn out to be right about being what we eat, Gracer is surely the creepiest, crawliest arthropod in all of New England.
The Brown Daily Herald RSS
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Arthropoda for 150 years were believed to originate from Annelida, but now they are derived from Nematoda.
On Thursday, the Legg report will be published along with...
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These agents might be arthropod-transmitted viruses, water contaminated with enteric bacteria, or helminths whose infective eggs and larvae are found in soil and invertebrate hosts.
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The authors base this claim on the well known fact several groups of multicellular animals, for example, bdelloid rotifers, tardigrades, nematodes and arthropods, have representatives that can survive extreme desiccation for long periods.
We are going to freeze dry you all!
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In the complementary category of the protostomes, which includes annelids and arthropods, the blastopore develops into the mouth.
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Arthropods are bilaterally symmetrical protostomes with strongly segmented bodies.
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These arthropods have a fork-like structure (called furcula) at the hind end that is hooked under their abdomen.
Durangoherald.com
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The sparry calcite is interpreted as a single phase of precipitation that infilled external moulds of the arthropod.
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The less highly organised terrestrial arthropoda -- the Arachnida and
Darwinism (1889)
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In contrast, arthropods such as the lobster possess distinct maxillipeds, pereopods, pleopods, and uropod.
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The army of arthropods slurped bits of organic material out of the muck, then ejected balls of it like so many wads of chewing tobacco.
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In the complementary category, the protostomes, which includes annelids and arthropods, the blastopore develops into the mouth.
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The effects at the population level, for the sake of simplicity, are assessed in arthropods.
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This insect is among the most damaging arthropod pests of pears in North America and Europe.
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The first tetrapods, or land-living vertebrates, appeared during the Devonian, as did the first terrestrial arthropods, including wingless insects and the earliest arachnids.
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The complete sequence of the mitochondrial genome of the giant tiger prawn, Penaeus monodon (Arthropoda, Crustacea, Malacostraca), is presented.
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Tuataras are primarily nocturnal predators of arthropods, especially those associated with sea bird colonies, and tree wetas (giant New Zealand orthopterans).
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Studies of fouled arthropods include horseshoe crabs, isopods, stomatopods, lobsters, and true crabs.
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He and his group have discovered the homeobox, a DNA segment characteristic for homeotic genes which is not only present in arthropods and their ancestors, but also in vertebrates up to man.
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Fifthly, the Trilobita is by far the best-represented arthropod group within Paleozoic rocks, from an important interval in the evolutionary history of the phylum Arthropoda.
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The EcR isoforms were newly identified in 51 species of insects and non-insect arthropods, including direct-developing ametabolous and hemimetabolous insects.
BioMed Central - Latest articles
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In Gould's concept of the term, the original homeobox regulatory mechanism would have evolved first in non-metameric animals, and then become modified later in the dominant metameric forms (i.e. arthropods and vertebrates).
Ancient Predator Revealed!
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It is of interest that a plant native to Eurasia would host such substantial numbers of phytophagous arthropods in North America.
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The limb staining suggests shared ancestry of the onychophoran and arthropod limbs.
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These taxa together form a paraphyletic group at the base of the clade of biramous arthropods.
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Researchers who have had the chance to see the amazing fossil say that the only thing you need to investigate the arthropod is a microscope.
Softpedia News - Global
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Thus in the life-story of an insect or other arthropod, such as a lobster, a spider, or a centipede, there must be a succession of cuticle-castings -- 'moults' or _ecdyses_ as they are often called.
The Life-Story of Insects
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A bimonthly journal that publishes reports on all phases of medical entomology and medical acarology - including the systematics and biology of insects, acarines, and other arthropods of public health and veterinary significance.
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Most of the arthropods consist of an infill of sparry calcite with uniform luminescence.
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Arthropods, chordates and annelids are the three segmented phyla in the animal kingdom.
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The crustaceans are a class of the phylum Arthropoda, a large and important phylum that includes animals with a segmented body, hard exoskeleton, and many jointed legs.
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This eriophyid is one of the smallest of the arthropods and of the size of 0.2 milimetre
Undefined
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Potentially damaging arthropods are common on landscape plants.
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Scientifically it has no relation to the great family of true insects; it belongs to the very distinct family of the arthropoda or "joint-footed" animals.
Books and Habits from the Lectures of Lafcadio Hearn
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The trilobites comprise a major class-level clade of extinct marine arthropods characterized by calcareous, multisclerite, dorsal exoskeletons.
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This was a pretty far out idea, since blood-based gas exchange is what other arthropods use (including aquatic ones) but was previously thought to be completely absent in insects, which deliver air directly to their tissues via tracheae.
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Hexapoda: tracheate arthropods with head, thorax and abdomen distinct, and only six legs in the adult stage: the true insects.
Explanation of Terms Used in Entomology
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Lilac-crowned Parrots are predominantly granivorous and do not supplement nestling diets with arthropod prey.
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They found that most groups of arthropods could be eliminated from consideration by the size of their fecal pellets; this is true of the Antarctic borings as well.
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The high degree of diversity of the annelidan nervous system may seem to weaken the power of the ropeladder-like nervous system to act as an apomorphic characteristic for a taxon comprising Annelida and Arthropoda.
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More than half of the arthropods were spiders, followed by coleopterans, orthopterans, and homopterans.
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From the diminutive to the rather large, something for fans of invertebrates, Hurdia victoria, a half-meter long predatory arthropod from the famous Cambrian-aged Burgess Shale of British Columbia.
"So lose some sleep and say you tried."
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Anaplasma ovis is an arthropod-borne rickettsial obligate parasite of sheep and goat. The disease caused by A.
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The eye of arthropod invertebrates (insects, crustaceans, etc.) is vastly different from the molluscan or vertebrate eye.
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Living among these early land plants were a diverse selection of arthropods, including spiders, mites, myriapods and collembolids.
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This line of thinking led me to suggest to Thorsten Burmester, an expert on arthropod gas exchange proteins, that he should check to see if stoneflies have hemocyanin in their blood.
Pharyngula: An evolutionary prediction - The Panda's Thumb
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Anopheles mosquitoes type of mosquitoes that may transmit malaria and rural filariasis arbovirus an arthropod-borne virus, i.e. a virus that is transmitted by insects, ticks or mites bilharziasis see: schistosomiasis cost-effectiveness analysis
Chapter 4
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Beautiful results are thus obtained with echinoderms, zoophytes, worms and marine arthropoda.
Practical Taxidermy A manual of instruction to the amateur in collecting, preserving, and setting up natural history specimens of all kinds. To which is added a chapter upon the pictorial arrangement of museums. With additional instructions in modelling a
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The main assumption was that the neural or blastoporal surface must be homologous throughout the Metazoa, though it was dorsal in the Chordata, ventral in the Annelida and Arthropoda.
Form and Function A Contribution to the History of Animal Morphology
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The Crustaceamorpha are arguably the most well known of the arthropods because of their contributions to aquatic, aerial, and terrestrial food webs.
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Stable isotope analyses have shown that ants can range from 'herbivorous' species, feeding primarily on exudates produced by plants and sap-feeding insects, to 'carnivorous' species feeding primarily on insect prey or scavenged arthropods.
PhysOrg.com - latest science and technology news stories
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As we watched, cockroaches, earwigs, isopods, and other small arthropods ran to escape the advancing waves of ants.
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Centipedes or chilopods are part of a larger group of arthropods called the Myriapoda.
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He considered that the mandibles and first maxillæ of Arthropods were the homologues of the upper and lower jaws of Vertebrates, adducing as confirmatory evidence the fact that in snakes the rami are separate.
Form and Function A Contribution to the History of Animal Morphology
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Major arthropod lines have long been recognized (insects, crustaceans, chelicerates, diplopods, chilopods, etc.), but the phylogenetic relationships among these groups remain controversial.
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More than 500 new species have been described or reported, including several mammals, one a new genus of otter shrew, more than ten amphibians and reptiles, several fish and arthropods, notably centipedes and harvestmen, and molluscs.
Mount Nimba Strict Nature Reserve, Guinea and Côte d'Ivoire
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Although in recent years the tradition of giving children rhinoceros beeries and stag beeries as gifts has lost ground to purchasing tiny electronic creature toys, children still flock to Japan's insectariums, or arthropod zoos.
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His eyebrows were of a more than wonted shagginess, growing together at the bridge of his nose, so as to form a thick excrescence of hair that bore an unsettling resemblance to a member of that singularly repellent variety of arthropod commonly known as the centipede.
Nevermore
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The No. 1 offender on his top 10 list is an animal most people have never heard of but obviously find commonly: a tiny arthropod called a springtail.
Vail Daily - Top Stories
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In nature arboviruses are routinely maintained by transmission cycles involving the passage of virus between susceptible vertebrate hosts and hematophagous arthropod vectors.
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Once a year, though, when the birds molt, the tiny arthropods face life-or-death options.
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Having established this primary principle, Semper has little difficulty in showing that the main organs of the body lie to one another in the same relative positions in Annelida, Arthropoda, and Vertebrata; and this, together with the metameric segmentation common to them all, constitutes his first great argument in favour of their genetic relationship.
Form and Function A Contribution to the History of Animal Morphology
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Now, after analyzing 62 shared genetic sequences across all the arthropods, the researchers are putting the strange shrimp together with the six-legged insects, Hexapoda, to form a new group they dubbed Miracrustacea, or "surprising crustaceans.
PhysOrg.com - latest science and technology news stories
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Artemis arteries arteriosclerosis art for arts sake arthritis arthropods arthroscope
Entry Index: appendectomy to Berkshires
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The chelicerate hemocyanin subunits are basal, consistent with the assumption that the Chelicerata is a rather distinct arthropod taxon.
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Vertebrates do it by means of a backbone and internal skeleton, arthropods achieve structural rigidity by means of a tough external skeleton or shell.
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All of these arthropods are known predators of insect eggs; on at least 17 plants, adult mites were directly observed attacking eggs.
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The femur-tibia (FT) feedback system of the stick insect is one of the best known motion feedback systems in arthropods.
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These animals include rodents, passerine birds and arthropods.
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Lobsters, crabs, prawns, bay bugs, freshwater and marine crayfish all belong to the phylum Arthropoda, the group which also contains insects.
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At times they eat arthropods, seeds, and grain, but they are more carnivorous than crows.
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If the local arthropodan life didn't suck all the blood out of them first, he told himself.
The False Mirror
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This implies that water-to-land transition occurred at least three times (hexapods, myriapods, arachnids) during the evolution of the Arthropoda.
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The hard parts may be mineralized, as in the shells of bivalves, or composed of organic material, such as the chitin that makes up the exoskeleton of arthropods.
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These included coxsackie and echoviruses, measles, rubella, smallpox, rabies and herpes viruses as well as viruses causing hepatitis, respiratory and arthropod-borne infections.
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Medical gamasid mite is a general designation of a kind of non-insect arthropod and it can transmit many diseases.
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In a study of 47 species of malacostracan arthropods, Becker found that most of the taxa were not heavily fouled.
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This would not be surprising if we consider extant marine arthropods such as Crustacea where it is usual that two or more planktonic larval stages occur prior to metamorphosis.
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Arthropods have a stiff cuticle made largely of chitin and proteins, forming an exoskeleton that may or may not be further stiffened with calcium carbonate.
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In similar reciprocal comparisons assuming minimum evolution, the arthropod map is united with the chordate map by three transformations.
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Some arthropods, like the centipedes, millipedes, and insects, have legs with a single branch (uniramous appendages).
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Some arthropods, like the centipedes, millipedes, and insects, have legs with a single branch (uniramous appendages).
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The ecdysozoans are supposed to include arthropods, priapulids and nematodes.
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In cases where we tested the hypothesis that arthropod densities and leaf damage would be lower in the control (with birds) than in the experimental exclosures (birds excluded), we used one-tailed tests for significance.
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The descending sort of groups of arthropod was predators, insect pests, parasitoids and neutral insects by the similarity degree of arthropod groups between weed habitat and paddy habitat.
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The body itself is not divisible into neatly - organized tagmata or regions as it is in most other arthropods.
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It is of interest that a plant native to Eurasia would host such substantial numbers of phytophagous arthropods in North America.
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Who knows what other microarthropods are lurking in the sand beneath, interstitial fauna inhabiting the chinks of the world.
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The effect of predator, parasitoid, insect pest and neutral insect groups in the arthropod community in the weed habitat on the corresponding groups in the paddy habitat were varied.
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It seemed to be to be about a foot long (probably six inches), it's arthropod feet scuttling along the floor, humping it's multiple legs in a nasty fashion.
What Flips Your Fear Switch?
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The most remarkable example is the three-dimensionally preserved soft tissues of the giant conodont animal Promissum pulchrum, eurypterids and other arthropods from the Upper Ordovician Soom Shale of South Africa.
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The advantage of an internal skeleton is that it allows the animal to grow much larger than is the case with the arthropod type exoskeleton.
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Studies of fouled arthropods include horseshoe crabs, isopods, stomatopods, lobsters, and true crabs.
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All chelicerate arthropods have this special first set of modified legs.
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Important fossil groups are the trilobites, a large group of Palaeozoic marine arthropods of uncertain affinity, and the eurypterids, Palaeozoic marine forms related to the arachnids.
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He ditched me for an arthropod but I'm almost over it ...
Sickdays
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For example, Hughes said of the Cambrian arthropod Burgessia: ‘what is apparent from this restudy is that Burgessia did possess a mixture of characters… many of which are to be found in modern arthropods of various groups’.
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Insects are mandibulate, not chelicerate arthropods, like spiders.
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The body fossil record of arthropods in the Chinle Formation is limited to beetle elytra and a few poorly preserved wings of orthopteran insects.
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The samples were dominated numerically by the Thysanoptera and Acari, accounting for over 90% of the arthropods from both leaf and stalk material.
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Despite numerous other studies demonstrating the importance of insectivorous birds to insect herbivore densities, bird exclusion resulted in relatively weak effects on the arthropod community on our saplings.
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Both butterfat and frog wax owe their water-repellent properties to organic compounds called lipids - the key components of the water barriers present in a variety of plants, arthropods, and vertebrates.
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The symposium featured 71 presentations covering soil-transmitted and water-borne helminth infections, as well as arthropod-borne diseases such as leishmaniasis, malaria and lymphatic filariasis.
BioMed Central - Latest articles
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Other ecdysozoan phyla include Nematoda, Tardigrada, and Onychophora; this classification thus removes onychophorans from the Arthropoda and makes them an outgroup.
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Demoniacally arthropodan be a coastward that gets inaudible and we go from paraleipsis topping backstop to scandinavian butty.
Rational Review
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Once a year, though, when the birds molt, the tiny arthropods face life-or-death options.
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Arthropods, chordates and annelids are the three segmented phyla in the animal kingdom.
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Segments are the building blocks of arthropod bodies, vertebrae the building blocks of backbones.
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Because of their size, the reticulations in the large and small mesh size fossil arthropods are unlikely to represent individual cells, counter to the situation found by Okada in modern ostracods.
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Among the many arthropods we share our home with are dermestid, or carpet, beetles Coleoptera: Dermestidae.
Archive 2006-04-01
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Plant material accumulated on the pond bottom, creating anoxic conditions that favored the preservation of terrestrial arthropods such as the millipedes and arachnids.
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Cooperative breeding and eusociality are taxonomically widespread, occurring in social arthropods, colonial invertebrates, mammals, birds, fish, and bacteria.
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Many experts believe that dengue is now the most worrisome arthropod-borne virus, or arbovirus, in the world (arthropods, which include insects, spiders, and crustaceans, have segmented body parts and an exoskeleton).
Scott Dodd: Climate Change Drives Dengue Fever Re-Emergence in U.S.
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For instance, many arthropods have lost extensive metamerism but still have remnants in the form of repeated organs (such as the limbs in cladocerans and spiders, or the heart ostia in a spider opisthosoma).
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Equally surprising are the mouthparts of the creature's curious digestive track that suggest a rather singular amalgam of arthropodous characteristics with those of insectivorous plants.
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Arthropods also have a hemocoel, an open body cavity in which blood flows and bathes the tissues and organs.
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The GM portions of the beet fields also had fewer butterflies, but more springtails, which are small arthropods that feed on dead plants.
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Such a scenario would be consistent with the fact that Recent crinoids serve as substrate for a large variety of organisms, including annelids, arthropods, gastropods, fish, ophiuroids, and polychaetes.
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In addition to Diptera, CI has since been found to be a Wolbachia-induced trait in a wide diversity of arthropod orders, including Acarina, Coleoptera, Homoptera, Hymenoptera, Isoptera, Lepidoptera, and Orthoptera.
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Despite their obvious differences, both mollusc shells and arthropod cuticle contain chitin.
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Parthenogenesis-inducing Wolbachia are restricted to species with haplodiploid sex determination, as occurs in the arthropod groups of Hymenoptera, Thysanoptera, Coleoptera, and Acari.
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The second clade includes arthropods and other molting animals: tardigrades, onychophorans, nematodes, nematomorphans, kinorhynchs, and priapulans.
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the biramous appendages of an arthropod
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The term "bug," while having a specific taxonomic meaning, is also used as an umbrella term to include land-arthropods in general, including arachnids, like scorpions and spiders.
Daniella Martin: What Do Bugs Taste Like, Anyway?
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Subsequently work on a brittle star showed expression of the gene in the tube feet, and many found it difficult to equate the tube feet of echinoderms with the parapodia of polychaetes or the arthropod limb.
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He points out that insects are the evolutionary cousins of crustaceans, which belong to the same taxonomic phylum, arthropoda.
The Brown Daily Herald RSS
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Fossil hunters find 150kg of amber in Gujarat province containing over 700 arthropod specimens
Prehistoric creatures discovered in huge Indian amber haul
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Far more satisfying was the Howard Wolowitz/Sheldon Cooper showdown over whether their captured arthropod was Toby the common field cricket or Jiminy the snow tree cricket.
'Big Bang Theory': Sheldon is (gasp!) proven wrong | EW.com
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In a current project we concentrate on the basal insects and aim to elucidate the phylogeny among the so-called apterygotes and their relationships to other arthropods using molecular and morphological approaches.
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If this occurrence of a true hexapod insect from the Middle Silurian be really established, taken in connection with the well-defined Coleoptera from the Carboniferous, the origin of the entire group of terrestrial arthropoda is necessarily thrown back into the Cambrian epoch, if not earlier.
Darwinism (1889)
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More than half of the arthropods were spiders, followed by coleopterans, orthopterans, and homopterans.
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Clearly visible within the imprint were the remains of trilobites, extinct marine arthropods.
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By analogy with modern arthropods this zone was inferred to lie at the anterior of a terminal ventral body segment-the telosoma and the antenniform cerci of Olenoides serratus might be interpreted as belonging to that segment.
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Bradoriids are small bivalved arthropods, historically considered to be the oldest members of the Ostracoda.
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When in coastal marshes, they are more omnivorous than most dabbling ducks, with mollusks, crustaceans, and arthropods making up nearly half of their diet.
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Arthropods have traditionally been divided into four classes: Trilobita, Chelicerata, Crustacea, and Uniramia.
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Ants and their fellow travellers Many arthropod guests also undergo physiological changes that smooth their integration into ant society.
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Arthropods have an exoskeleton and segmented bodies with appendages on each segment.
Times, Sunday Times
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Each somite pair corresponds to a myotome in vertebrates or to an adult segment in annelids and arthropods.
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Recent evidence suggests that the compound eyes of myodocopid ostracods may be phylogentically non-homologous to those of other arthropods.
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Likewise, the relative recalcitrance of various non-mineralizing tissues such as algal cyst walls, graptolite periderm, polychaete chaetae and arthropod cuticles contributes to their enhanced preservation potential.
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The paper recorded sixty-five taxa that were represented by six species (carabids, cicindelines, staphylinids, dermapterans, heteropterans and araneids), and 38,980 ground-dwelling arthropods from both sites (non Bt and Bt cotton fields).
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The recently published Ecdysozoa hypothesis suggests a closer relationship of the Scalidophora, Nematode, Nematomorpha, Tardigrada, Onychophora, and Arthropoda.
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Within the large arthropods we found that birds consistently reduced numbers from all taxonomic classes.
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In that time, the first undoubted fossil annelids, arthropods, brachiopods, echinoderms, molluscs, onychophorans, poriferans, and priapulids show up in rocks all over the world.
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The focus of this paper is on the Crustacea, the class of Arthropoda that expresses both hemoglobin and hemocyanin.
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The arthropodes, like centipedes, beetles, millipedes and worms, bring in the finishing touches to complete the composting.
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Tagmosis can ultimately lead to the outright fusion of neighbouring segments and the loss of apparent metamerism, as seen for the arthropod head.
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Surprisingly, two studies have reported considerable amounts of Further, aphids and other phloem feeders produce honeydew which is an important source of carbohydrates for sugar feeding arthropods, including hymenopteran parasitoids and aphid predators
PLoS ONE Alerts: New Articles
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In other schemes the phylum Arthropoda is retained and the major taxa are given subphylum or class status.
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They therefore contribute more information than trackways towards our understanding of the diversity of ancient arthropod communities.
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The article, Prenuptial perfume: Alloanointing in the social rituals of the crested auklet Aethia cristatella and the transfer of arthropod deterrents, will be published in the German journal Naturwissenschaften.
Prenuptial Perfumery - A Mating Ritual
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The Cambrian Explosion, for example, is the first time we are able to distinguish a chordate from an arthropod.
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Insects were members of the phylum arthropoda – creatures having hard outer skeletons and jointed legs.
Deception Point
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The Chelicerates include among their number both the tiniest (the microscopic Acari or mites) and the hugest (the giant Paleozoic Eurypterida) of all the Arthropoda.
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Males in the cavity-nesting house wren frequently add arthropod cocoons to their nests during building, possibly as an ornamental cue for female choice.
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Introduction of exotic species of parasitic and predaceous arthropods has been in small extent, but more attention has been paid in recent years.
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Major arthropod lines have long been recognized (insects, crustaceans, chelicerates, diplopods, chilopods, etc.), but the phylogenetic relationships among these groups remain controversial.
-
The main assumption was that the neural or blastoporal surface must be homologous throughout the Metazoa, though it was dorsal in the Chordata, ventral in the Annelida and Arthropoda.
Form and Function A Contribution to the History of Animal Morphology
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In insects, as in all arthropods, the main nerve cord lies ventrally, rather than dorsally as in vertebrates.
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This type of ornamentation is often found in crustaceans including Daphnia, many species of ostracodes, and other Cambrian bivalved arthropods such as Isoxys.
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Whilst true arthropods, tardigrades and onychophorans are highly differentiated in form today, such was not always the case.
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Geoffroy's principle of the unity of plan and composition to the three great metameric groups, the Annelida, Arthropoda, and Vertebrata.
Form and Function A Contribution to the History of Animal Morphology
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Phytoseiid mites and heteropteran bugs are frequently part of the enemy complex of herbivorous arthropods in agroecosystems.
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A competent arthropod vector is one in which the ingested virus is able to infect the mesenteronal epithelial cells, disseminate from the mesenteron and replicate in the salivary glands, and be ejected with the salivary secretion during a blood meal.
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A short survey to a depth of 20 m revealed 168 species of finfish, 60 species of cnidaria, including corals, 8 molluscs, 14 sponges, 11 echinoderms, 15 arthropods and 8 annelid worms.
Pitons Management Area, Saint Lucia
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Densities of predaceous arthropods were higher on fertilized than on unfertilized trees.
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The beautifully preserved remains include molluscs, sea urchins and arthropods, alongside much larger animals that occupied the top of the food chain, such as carnivorous fish and the first icthyosaurs, predatory marine reptiles that grew to four metres long.
Fossil hunters uncover complete 252m year-old underwater world
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This constraint may limit acanthocephalan lineages to particular arthropod hosts, whereas the use of particular vertebrate hosts may be more free to vary.
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West Nile virus is an important arthropod borne flavivirus; it usually causes a mild infection called West Nile fever in humans and horses.
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The ecdysozoans are supposed to include arthropods, priapulids and nematodes.
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The effects of chemical pesticides on arthropod community in spring wild cabbage field were studied from the ecological point in this article.