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Arachnids include spiders, scorpions, mites and ticks. There are about 60,000 species of arachnids. Arachnids have eight legs, not six like insects. They also have an extra pair of either pincers or fangs. They do not have wings or antennae but they do have a hard exoskeleton.Arachnids have two parts to their body-the cephalothorax and the abdomen. The cephalothorax is like the head and thorax section of an insect but it is fused together.rachnids include spiders, scorpions, mites and ticks. There are about 60,000 species of arachnids. Arachnids have eight legs, not six like insects. They also have an extra pair of either pincers or fangs. They do not have wings or antennae but they do have a hard exoskeleton.
Some scorpions glow under ultraviolet light. Some species of scorpion glow when exposed to ultraviolet light. The emperor scorpion normally is dark brown or black, but it glows a bright blue-green when exposed to black light. The bark scorpion and European yellow-tailed scorpion also glow. If you have a pet scorpion, you can check to see whether or not it glows using a black light, but don't keep it exposed to ultraviolet light for too long or it can suffer damage from the ultraviolet radiation.