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arthropod |
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arthropodMember of the phylum Arthropoda; an invertebrate animal with jointed legs and a segmented body with a horny or chitinous casing (exoskeleton), which is shed periodically and replaced as the animal grows. Included are arachnids such as spiders and mites, as well as crustaceans, millipedes, centipedes, and insects. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| Centipedes are the most familiar of the myriapodous arthropods, which consist of five groups of arthropods that had a separate origin from other arthropods. projecting from the front of its head, unlike anything seen in other fossils or living arthropods. That Cambrian arthropods had some sort of behavioral adaptation for coping with times out of water is not so surprising, but for them to be using shells like hermit crabs nearly 500 million years ago is amazing. |
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