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It's All In the Legs
Six legs |
Insects are hexapods (six-legged).
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There is a simple way to recognize an insect À it's a foolproof method even a first-grader can use without making a mistake. It has to do with the legs. All insects, without exception, from the diminutive flea to the large Hercules beetle--have six legs.
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Eight legs |
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Spiders, on the other hand, have eight legs so they are not insects. They belong to another class of animals, the Arachnida.
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A tarantula.
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Another eight-legged animal |
Another member of the Class Arachnida
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Scorpions may not sping webs, but they have eight legs, which means that they are spiders. Their pincers don't count as legs, since they are only used to hold down prey.
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Legs galore! |
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Let's now examine a centipede. This animal has at least fifteen pairs of legs; one pair for every section of its jointed body. These animals have been grouped in a class of their own, the Myriapoda.
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A centipede. Class: Myriapoda.
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The record holder for legs |
A thousand legs? You've got to be kidding!
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The most famous of all myriapods is the millipede; it holds the world record for number of legs. Each section of its body has four legs, twice as many as its cousin, the centipede. Depending on the species, millipedes have from 30 to 88 pairs of legs. Although erroneous, the name millipede has stuck, however -- you have to admit it sounds a lot better than calling them Ça-hundred-and-seventy-six-pedes...È
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