The Arachnids are a class of eight-legged arthropods. They are a highly successful group of mainly terrestrial invertebrates: spiders, scorpions, harvestmen, ticks, and mites, and a number of smaller groups
Centipedes are arthropods belonging to the class Chilopoda of the subphylum Myriapoda, an arthropod group which also includes Millipedes and other multi-legged creatures. Centipedes are elongated metameric creatures with one pair of legs per body segment.
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