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 Phalangodidae are a family of harvestmen with about 30 genera and more than 100 described species, distributed in the Holarctic region.
The Neopilionidae are a family of harvestmen.
Globipes is a genus of harvestmen in the family Globipedidae from North America with three described species. Two are found on the western coast of the USA.
Crosbycus is a potentially monotypic genus of harvestmen in the family Taracidae, with one species found in North America as of 2023, per the World Catalog of Opiliones.
Microbisium is a genus of pseudoscorpions in the family Neobisiidae. There are about 12 described species in Microbisium.
Cladolasma, is a genus of harvestmen belonging to the family Nemastomatidae. The genus is monotypic containing a single species Cladolasma parvulum. They are endemic to Japan, with records in Ehime and Tokushima Prefectures. The genus was described by Seisho Suzuki, with the type species Cladolasma parvulum Suzuki, 1963, subsequently revised to Dendrolasma parvulum in Suzuki (1974), but later restored as a valid genus.
Siro is a genus of mite harvestmen in the family Sironidae. There are at least 20 described species in Siro.
Caddo is a genus of harvestmen in the family Caddidae. There are two described species in Caddo. Both species are found in North America and Eastern Asia.
Ortholasma is a genus of harvestmen in the family Nemastomatidae with 5 described species. The genus has been revised by Shear (2010).
Vonones is a genus of armoured harvestmen in the family Cosmetidae. There are at least two described species in Vonones.
Dalquestia rugosa is a species of harvestman in the family Globipedidae. It is found in North America.
Phalangodes is a genus of armoured harvestmen in the family Phalangodidae. There is at least one described species in Phalangodes, P. armata.
Dalquestia formosa is a species of harvestman in the family Globipedidae. It is found in North America.
Dendrolasma is a genus of harvestmen in the family Nemastomatidae with two described species. Both species are found in the western coast of North America. An overview of their taxonomy was provided by Schönhofer (2013).
Ortholasmatinae is a subfamily of harvestmen in the family Nemastomatidae with 27 described species in 7 genera. They are found in temperate and often mountainous regions of the Northern Hemisphere.
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.
Asiolasma is a genus of harvestmen in the family Nemastomatidae with six described species . The species are found in Southeast Asia, namely China, Vietnam and Thailand. Some species are treated under other genera in Schönhofer (2013).
Trilasma is a genus of harvestmen in the family Nemastomatidae with nine described species . The species are mainly found in Mexico.
Rakaia is a genus of harvestmen in the family Pettalidae with eighteen described species. All species are found in New Zealand.
