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Suborder Opiliones, also known as harvestmen, are a group of arachnids belonging to the order Arachnida. These animals are characterized by their long, spindly legs and small, oval-shaped bodies. Unlike other arachnids, such as spiders and scorpions, harvestmen do not possess venom glands or segmented bodies. They are found worldwide and are most diverse in tropical regions. Harvestmen are generally nocturnal creatures and feed on a variety of small invertebrates, including insects, mites, and other arachnids. Some species of harvestmen are known to engage in social behaviors, such as forming groups or communicating with each other through chemical signals. Overall, suborder Opiliones represents a diverse and fascinating group of animals within the arachnid class.