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.
Gonyleptidae is a neotropical family of harvestmen with more than 800 species, the largest in the suborder Laniatores and the second largest of the Opiliones as a whole. The largest known harvestmen are gonyleptids.
The Stygnidae are a family of neotropical harvestmen within the suborder Laniatores.
Agoristenidae are a neotropical harvestman family of the Suborder Laniatores, in the superfamily Gonyleptoidea.
The Cranaidae are a family of neotropical harvestmen within the suborder Laniatores.
The Icaleptidae are a small family of neotropical harvestmen within the suborder Laniatores. Although only two species have been described, many more are probably to be discovered.
The Zalmoxidae are a family of harvestmen within the suborder Laniatores.
The Cladonychiidae are a small family of harvestman with about 33 described species, within the suborder Laniatores.
Vonones sayi is a species of armoured harvestman in the family Cosmetidae. It is found in North America.
Vonones is a genus of armoured harvestmen in the family Cosmetidae. There are at least two described species in Vonones.
Cryptomastridae is a family of armoured harvestmen in the order Opiliones. There are two genera and four described species in Cryptomastridae, found in Oregon and Idaho.
Cynorta is a genus from the subfamily Cynortinae. The genus was first described by Carl Ludwig Koch.
Rhaucus is a genus of harvestmen in the family Cosmetidae. The genus is endemic to the Colombian northern Andes. There are currently seven described species in the genus.
Poecilaemula eutypa is a species of harvestmen from Central America in the family Cosmetidae. It was first described by Ralph Vary Chamberlin in 1925.
Discosomaticinae is a subfamily of harvestmen in the family Cosmetidae.
Metergininae is a subfamily of harvestmen in the family Cosmetidae.
Poecilaemula is a genus of harvestmen in the family Cosmetidae with eight described species. All species are from Central America or South America. An overview of the taxonomy was provided by Medrano et al. (2024)
Poecilaemula iching is a species of harvestmen from Central America in the family Cosmetidae. It was first described by Medrano, Kury, Martins & Proud, 2024 in 2024.
Poecilaemula signata is a species of harvestmen from Central America in the family Cosmetidae. It was first described by Banks in 1909.
Abria is a genus of harvestmen in the family Cosmetidae with three described species. All species are from Venezuela. An overview of the taxonomy was provided by Villarreal, Medrano & Kury (2023)
