The Opiliones are an order of arachnids colloquially known as harvestmen, harvesters, harvest spiders, 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 Tetrophthalmi, which were named in 2014.
The Eupnoi are a suborder of harvestmen, with more than 200 genera, and about 1,700 described species.
The Phalangodidae are a family of harvestmen with about 30 genera and more than 100 described species, distributed in the Holarctic region.
Leiobunum is a genus of the harvestman family Sclerosomatidae with more than 100 described species. Contrary to popular belief, they are not spiders, although they share a resemblance. They are arachnids, in the order Opiliones, harvestmen. Species in Leiobunum tend to have relatively long legs compared with other harvestmen, and some species are gregarious.
The Cladonychiidae are a small family of harvestman with about 33 described species, within the suborder Laniatores.
Nelima is a genus of harvestmen in the family Sclerosomatidae.
Sitalcina is a genus of armoured harvestmen in the family Phalangodidae. There are about 10 described species in Sitalcina.
Taracidae is a family of harvestmen in the order Opiliones. There are 4 genera and 23 described species in Taracidae.
Protolophidae is a family of harvestmen in the order Opiliones. There is at least one genus, Protolophus, and about six described species in Protolophidae found in Western North America.
Paranonychidae is a family of armoured harvestmen in the order Opiliones. There are about 6 genera and at least 20 described species in Paranonychidae.
Theromaster is a genus of armoured harvestmen in the family Cladonychiidae. There are at least two described species in Theromaster, found in the eastern United States.
Travunioidea is a superfamily of armoured harvestmen in the order Opiliones. There are 4 families and more than 70 described species in Travunioidea.
Texella is a genus of armoured harvestmen in the family Phalangodidae. There are more than 20 described species in Texella.
Zuma is a genus of harvestman in the family Paranonychidae. There are at least two described species in Zuma, found in central and northern California.
Crosbyella is a genus of armoured harvestmen in the family Phalangodidae. There are about five described species in Crosbyella.
Megacina is a genus of armoured harvestmen in the family Phalangodidae. There are at least four described species in Megacina.
Protolophus niger is a species of harvestman in the family Protolophidae. It is found in the western US.
Leiobunum calcar is a species of harvestman in the family Sclerosomatidae. It is found in North America.
Nemastomatinae is a subfamily of harvestmen with over 125 described species in 19 (extant) genera. They are usually found in temperate regions.
The harvestman family Globipedidae is a small lineage comprising 6 genera and some 34 species from North America and Central America, formerly included as a subfamily within Sclerosomatidae.
