The Opiliones /oʊˌpɪliˈoʊniːz/ or /ɒˌpɪliˈoʊnɛz/ (formerly Phalangida) are an order of arachnids colloquially known as harvestmen, harvesters or daddy longlegs. As of April 2017, over 6,650 species of harvestmen have been discovered worldwide, although the total number of extant species may exceed 10,000. The order Opiliones includes five suborders: Cyphophthalmi, Eupnoi, Dyspnoi, Laniatores, and the recently named Tetrophthalmi. (Wikipedia)