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Arachnida


[R] Animals of this class of terrestrial arthropods have a body typically comprising 2 parts: the cephalothorax and the abdomen.
The cephalothorax, body region having the characteristics of both a head and thorax, possesses simple eyes and 6 pairs of appendages, including chelicerae situated at the front of the mouth aperture, 1 pair of mandible-like pedipalps and 4 pairs of locomotive legs.
The abdomen includes an anterior genital aperture and a posterior anus.
Males and females usually live separated and mating is preceded by a strange "courtship" dance. Most arachnids are oviparous.
The main groups are the spiders, the mites, which have very diverse feeding habits, the scorpions, the pseudoscorpions and harvestmen, most of which are zoophagous.


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