Opiloni

Opiliones is an order of arachnids, with over 6,400 described species worldwide as of 2006. The order is divided into 4 suborders, the most numerous being Laniatores comprising 4,000 species.
Opilions (also called cosasi, field spiders or opilionids) have segmented opisthosoma and very long legs in relation to the body, which distinguishes them from spiders. In addition, they do not produce silk. Opilions have no venom and their chelicerae cannot penetrate human skin. However, because of their resemblance to spiders, many believe they pose a danger to humans.