chelicerate sentence in Hindi
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- Unlike insects, spiders and other chelicerates do not have antennae.
- Spiders and scorpions are members of one chelicerate group, the arachnids.
- In most chelicerates the pedipalps are relatively small and are used as sensors.
- The evolutionary origins of chelicerates from the early arthropods have been debated for decades.
- Arachnids are eight-legged chelicerate arthropods with pedipalps and bodies divided into two tagmata.
- Chelicerates were originally predators, but the group has diversified to use all the major feeding strategies.
- The extant chelicerates comprise two marine groups : sea spiders and horseshoe crabs, and the terrestrial arachnids.
- It has been placed among the arachnomorphs, a group of arthropods that includes the chelicerates and trilobites.
- Peptide chains in crustaceans are about 660 amino acid residues long, and in chelicerates they are about 625.
- In other chelicerates, such as spiders, the mesosoma is fused with the metasoma to form the opisthosoma.
- While the marine horseshoe crabs rely on external fertilization, air-breathing chelicerates use internal but usually indirect fertilization.
- The abdominal appendages of modern chelicerates are missing or heavily modified while those of horseshoe crabs ( Xiphosura ) form gills.
- Except the chelicerates and proturans, which have none, all non-crustacean arthropods have a single pair of antennae.
- The organs of this chelicerate extend throughout many appendages because its body is too small to accommodate all of them alone.
- Another idea is that they belong to their own lineage, distinct from chelicerates, crustaceans, myriapods, or insects.
- Like all arthropods, chelicerates have bristles for touch and for information about vibrations, air currents, and chemical changes in their environment.
- It has more support among paleontologists who consider it a sister group to Arachnomorpha, which includes trilobites and chelicerates ( see cladogram below ).
- Dalman and Lucas ( 2015 ) interpreted these regions as imprints of the chelicerae, prosoma, and opisthosoma, respectively, of a chelicerate arthropod.
- In most chelicerate species the young have to fend for themselves, but in scorpions and some species of spider the females protect and feed their young.
- Frequent chelicerates ( arthropods ) include trace and body fossils of xiphosurid merostomes and arachnids, including Phalangiotarbi and Trigonotarbida and also true spiders ( Araneida ).
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