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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.
Dyspnoi is a suborder of harvestmen, currently comprising 43 extant genera and 356 extant species, although more species are expected to be described in the future. The eight families are currently grouped into three superfamilies: the Acropsopilionoidea, Ischyropsalidioidea, and Troguloidea.
Megabunus is a genus of harvestmen with six known recent species. All occur in Europe, mostly in the vicinity of the Alps.
Rilaena triangularis is a species of the harvestman family Phalangiidae. It is sometimes considered to be in the genus Paraplatybunus, in the subfamily Platybuninae.
Fumontana is a genus of harvestman that occurs in the United States with one described species, F. deprehendor.
Troglosironidae is a family of harvestmen with seventeen described species in a single genus, Troglosiro, which is found on the island of New Caledonia, in the Pacific Ocean.
Nipponopsalididae is a family of harvestmen with three described species in one genus, Nipponopsalis, which is found in East Asia.
Ischyropsalididae is a family of harvestmen with 35 described species in 3 genera, found in Europe and North America.
Sandokanidae is a family of harvestmen in the suborder Laniatores, formerly referred to as Oncopodidae
Oncopus is a genus of moths in the family Geometridae first described by Gottlieb August Wilhelm Herrich-Schäffer in 1855. It is a senior homonym of OncopusThorell, 1876, but since this latter genus of opilionids has been much more used in the literature, it has been proposed to the ICZN in 2006 to suppress the Lepidoptera name. The proposal was refused in 2008.
Prothemenops is a genus of Southeast Asian armored trapdoor spiders that was first described by Peter J. Schwendinger in 1991.
Konrad Thaler was an Austrian arachnologist.
Regulus is a genus of bird in the family Regulidae.
Cladolasma, is a genus of harvestmen belonging to the family Nemastomatidae. The genus contains 4 species. They are confined to China, Japan and Thailand.
Ceratolasma is a genus of harvestmen in the family Ischyropsalididae, found in the Pacific Northwest. There is one described species in Ceratolasma, C. tricantha.
Ortholasmatinae is a subfamily of harvestmen with 27 described species in 7 genera.
Nemastomatinae is a subfamily of harvestmen with 123 described species in 18 genera.
Wilhelmus Egbertus Antonius Janssen, better known as Father Chrysanthus OFMCap, was a Dutch priest and biology teacher. He was known for his studies in arachnology. Initially he was concerned with the spiders of the Netherlands but he became a specialist on New Guinea spiders. Two spider species were named in his honor following his death.
