Harvestmen (Opiliones)

This group gathers Arachnids subcategory members belonging to the order Opiliones, the harvestmen, familiar to many people under the common name daddy longlegs despite frequent confusion with unrelated long-legged flies and cellar spiders that share the same nickname in different regions. Unlike true spiders, harvestmen have a body that appears as a single fused, rounded segment rather than a clearly divided cephalothorax and abdomen, produce no silk and are not venomous, and many species are scavengers and omnivores rather than dedicated predators, feeding on small invertebrates, fungi, plant matter and decaying organic material. A harvestman's extremely long, thin legs are highly sensitive sensory structures, and, unlike many other arachnids, a lost leg does not regenerate, though several species can voluntarily detach a leg to escape a predator's grip, a defense called autotomy.