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.
Uloborus plumipes is a species of Old World cribellate spider in the family Uloboridae. Common names include the feather-legged lace weaver and the garden centre spider, the latter name being due to its frequent occurrence of this spider in garden centres. The species name is derived from the Latin pluma "feather" and pes "foot".
Evarcha falcata is a species of 'jumping spiders' belonging to the family Salticidae.
The Eupnoi are a suborder of harvestmen, with more than 200 genera, and about 1,700 described species.
Banksula melones is a species of harvestman in family Phalangodidae. It is endemic to caves along the Stanislaus River of California, United States.
Mitopus morio is a species of harvestman arachnid belonging to the family Phalangiidae.
Leiobunum rotundum is a species of harvestman that is found within the western portion of the Old World.
Phalangium opilio is a species of harvestman belonging to the family Phalangiidae.
Ogoveidae is a family of harvestmen with three described species in one genus, Ogovea, which is found in equatorial West Africa.
Nipponopsalididae is a family of harvestmen with three described species in one genus, Nipponopsalis, which is found in East Asia.
Opilio canestrinii is a species of harvestman.
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.
Pholcus phalangioides, commonly known as the cosmopolitan cellar spider, long-bodied cellar spider or one of various types called a daddy long-legs spider, is a spider of the family Pholcidae. It is also known as the skull spider, since its cephalothorax is said to resemble a human skull. This is the only spider species described by the Swiss entomologist Johann Kaspar Füssli, who first recorded it in 1775. Its common name of "daddy long-legs" should not be confused with a different arachnid group with the same common name, the harvestman (Opiliones), or the crane flies of the superfamily Tipuloidea.
Zygoballus sexpunctatus is a species of jumping spider which occurs in the southeastern United States where it can be found in a variety of grassy habitats. Adult spiders measure between 3 and 4.5 mm in length. The cephalothorax and abdomen are bronze to black in color, with reddish brown or yellowish legs. The male has distinctive enlarged chelicerae and front femora. Like many jumping spiders, Z. sexpunctatus males exhibit ritualized courtship and agonistic behavior.
The Cokendolpher cave harvestman, Texella cokendolpheri, is a species of cave-living harvestman native to Bexar County, Texas. The original common name, the Robber Baron Cave harvestman, stemmed from the cave which the harvestman inhabits. The scientific name and the current common name honor the prominent arachnologist, James Cokendolpher, who identified the species. T. cokendolpheri is one of twenty-eight species within the North American harvestman genus Texella. The first formal description of the harvestman took place in 1992 and the species’ listing under the Endangered Species Act followed eight years later. Current threats to the species include habitat loss and interactions with invasive fire ants.
Paruroctonus boreus, commonly known as the northern scorpion, is a species of scorpion in the family Vaejovidae. It is the northernmost species of scorpion, the only scorpion found in Canada, and one of the scorpions with the broadest distribution over North America.
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.
Dasylobus argentatus is a species of harvestman in the family Phalangiidae.
Forsteropsalis photophaga, also known as the glow-worm hunter, is a species of long-legged harvestman in the family Neopilionidae. This species is endemic to New Zealand, found in North Island caves in the vicinity of Waitomo. The name "photophaga" comes from their habit of feeding on the luminescent larvae, pupae, and adults of the New Zealand glow-worm Arachnocampa luminosa.
Prasmiola unica is the only member of the genus Prasmiola in the harvestman family Triaenonychidae. It is found near Wellington, New Zealand, and is known from a single specimen. The New Zealand Threat Classification System status for this species is 'nationally critical'.
