The Opiliones are an order of arachnids, colloquially known as harvestmen, harvesters, harvest spiders, or daddy longlegs. As of July 2024, 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.
John Blackwall was an English naturalist with a particular interest in spiders.
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.
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.
Leiobunum rotundum is a species of harvestman that is found within the western portion of the Old World.
Opiliones are an order of arachnids and share many common characteristics with other arachnids. However, several differences separate harvestmen from other arachnid orders such as spiders. The bodies of opiliones are divided into two tagmata : the abdomen (opisthosoma) and the cephalothorax (prosoma). Unlike spiders, the juncture between the abdomen and cephalothorax is often poorly defined. Harvestmen have chelicerae, pedipalps and four pairs of legs. Harvestmen were traditionally thought to have two eyes, except in the case of eyeless species. Developmental genetic work has shown that living species retain up to six eyes, including one pair of rudimentary median eyes and one pair of rudimentary lateral eyes.
Leiobunum blackwalli is a species of harvestman. It is found in Europe, but has been introduced to British Columbia in Canada and Seattle in the United States.
Pitsea Marsh is a 94.6-hectare (234-acre) Site of Special Scientific Interest in Pitsea in Essex. The southern half is the Wat Tyler Country Park, and the northern half is private land.
Leiobunum townsendi is a species of harvestman in the family Sclerosomatidae. It is found in North America.
Leiobunum bracchiolum is a species of harvestman in the family Sclerosomatidae. It is found in North America.
Leiobunum ventricosum is a species of harvestman in the family Sclerosomatidae. It is found in North America.
Leiobunum nigropalpi is a species of harvestman in the family Sclerosomatidae. It is found in North America.
Leiobunum relictum is a species of harvestman in the family Sclerosomatidae. It is found in North America.
Copestylum vittatum, the striped bromeliad fly, is a species of syrphid fly in the family Syrphidae. It is widely distributed in North America.
Leiobunum flavum is a species of harvestman in the family Sclerosomatidae. It is found in North America.
Leiobunum aldrichi is a species of harvestman in the family Sclerosomatidae. It is found in North America.
Leiobunum calcar is a species of harvestman in the family Sclerosomatidae. It is found in North America.
Leiobunum uxorium is a species of harvestman in the family Sclerosomatidae. It is found in North America.
Acromares vittatum is a species of harvestman from the genus Acromares. This species was first described by Clarence J. Goodnight and Marie Louise Goodnight in 1942.
