The Opiliones are an order of arachnids colloquially known as harvestmen, harvesters, 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 giant house spider has been treated as either one species, under the name Eratigena atrica, or as three species, E. atrica, E. duellica and E. saeva. As of April 2020, the three species view was accepted by the World Spider Catalog. They are among the largest spiders of Central and Northern Europe. They were previously placed in the genus Tegenaria. In 2013, they were moved to the new genus Eratigena as the single species Eratigena atrica. In 2018, the three separate species were restored. The bite of these species does not pose a threat to humans or pets, and they are generally reluctant to bite, preferring instead to hide or escape.
The southern hawker or blue hawker is a species of hawker dragonfly.
Cyphophthalmi is a suborder of harvestmen, colloquially known as mite harvestmen. Cyphophthalmi comprises 36 genera, and more than two hundred described species. The six families are currently grouped into three infraorders: the Boreophthalmi, Scopulophthalmi, and Sternophthalmi.
The Phalangiidae are a family of harvestmen with about 380 known species. The best known is Phalangium opilio. Dicranopalpus ramosus is an invasive species in Europe.
Megabunus diadema is a species of harvestman distributed in Western Europe, where it has been found in Iceland, Faroe Islands, Western Norway, Great Britain, Western France, Belgium and Northern Spain.
The Phalangodidae are a family of harvestmen with about 30 genera and more than 100 described species, distributed in the Holarctic region.
Mitopus morio is a species of harvestman belonging to the family Phalangiidae.
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.
Trogulidae is a family of harvestmen with 5 genera and 57 extant species and one fossil species.
Nipponopsalididae is a family of harvestmen with three described species in one genus, Nipponopsalis, which is found in East Asia.
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. Most harvestmen have two eyes, although there are eyeless species.
Lestes sponsa, is a damselfly, with a wide Palaearctic distribution. It is known commonly as the emerald damselfly or common spreadwing. Both males and females have a metallic green colour and when resting its wings are usually half opened.
Paroligolophus meadii is a species of harvestman. It occurs in England. It is less common and significantly smaller than the related species Paroligolophus agrestis.
Leiobunum blackwalli is a species of harvestman. It is found in Europe.
Trogulus tricarinatus is a species of harvestman. It is found in Europe and North America.
Metaphalangium cirtanum is a species of harvestman belonging to the family Phalangiidae.
Pardosa agrestis is a non-web-building spider in the family Lycosidae, commonly known as wolf spiders.
Forsteropsalis pureora is a species of long-legged harvestman in the family Neopilionidae. This species is endemic to New Zealand, found in the North Island. They are found in native forest, often resting on vegetation or stream banks.
