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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.
Opiliones are arachnids, but not spiders. They have no venom glands at all, and are absolutely not venomous. The nickname daddy longlegs may also refer to a crane fly, which is a true fly and a member of the order Diptera.Crane flies do not pose a threat, either.Sometimes, the name daddy longlegs is used for another group of arachnids, the spiders of the family Pholcidae. These spiders are also commonly called cellar spiders. Cellar spiders do have venom glands.However, there is no scientific evidence whatsoever to confirm that their venom can harm a human being.rane flies do not pose a threat, either. Sometimes, the name daddy longlegs is used for another group of arachnids, the spiders of the family Pholcidae. These spiders are also commonly called cellar spiders.