Genus Phalangium refers to a group of arachnids found in Europe and North America, commonly called harvestmen or daddy longlegs. These arachnids are characterized by their long legs and cylindrical body shape. Synonyms for the genus Phalangium include the name Opiliones, which is often used in scientific literature. Other synonyms include the names Cyphophthalmi and Eupnoi, both of which refer to suborders within the larger order of harvestmen. Despite their intimidating appearance, harvestmen are harmless to humans and serve as valuable predators of small insects and arthropods in their natural habitats.