The recluse spiders, also known as brown spiders, fiddle-backs, violin spiders, and reapers, is a genus of spiders that was first described by R. T. Lowe in 1832. They are venomous spiders known for their bite, which sometimes produces a characteristic set of symptoms known as loxoscelism.
Ground spiders comprise Gnaphosidae, the seventh largest spider family with nearly 2,000 described species in over 100 genera distributed worldwide. There are 105 species known to central Europe, and common genera include Gnaphosa, Drassodes, Micaria, Cesonia, Zelotes and many others. They are closely related to Clubionidae. At present, no ground spiders are known to be seriously venomous to humans.
The Agelenidae are a large family of spiders in the suborder Araneomorphae. Well-known examples include the common "grass spiders" of the genus Agelenopsis. Nearly all Agelenidae are harmless to humans, but the bite of the hobo spider may be medically significant, and some evidence suggests it might cause necrotic lesions, but the matter remains subject to debate. The most widely accepted common name for members of the family is funnel weaver.
Scaffold web spiders (Nesticidae) is a family of araneomorph spiders closely allied with tangle web spiders. Like the "Theridiidae", these spiders have a comb of serrated bristles on the hind tarsi that are used to pull silk bands from the spinnerets. It contains 16 genera and about 300 species, many of which are associated with caves or overhangs. The genus Nesticus is the type for the family and is found throughout the world. The related Eidmannella has speciated considerably in Texas caves and includes some extremely localized species that are considered threatened. One species, Eidmannella pallida, is found in caves and under overhangs, but also in agricultural fields and other habitats away from such restricted areas. The genus Carpathonesticus is found in central Eurasia.
Dictynidae is a family of cribellate, hackled band-producing spiders first described by Octavius Pickard-Cambridge in 1871. Most build irregular webs on or near the ground, creating a tangle of silken fibers among several branches or stems of one plant.
Drassodes is a genus of ground spiders that was first described by Niklas Westring in 1851. They are brown, gray, and red spiders that live under rocks or bark in mostly dry habitats, and are generally 3.8 to 11.6 millimetres long, but can reach up to 20 millimetres (0.79 in) in length.
Saltonia is a monotypic genus of North American cribellate araneomorph spiders in the family Dictynidae containing the single species, Saltonia incerta. It was first described by R. V. Chamberlin & Wilton Ivie in 1942, and has only been found in United States. Originally placed with the funnel weavers, it was moved to the Dictynidae in 1967.
Gnaphosa is a genus of ground spiders that was first described by Pierre André Latreille in 1804. They all have a serrated keel on the retromargin of each chelicera.
Ajmonia is a genus of cribellate araneomorph spiders in the family Dictynidae, and was first described by Lodovico di Caporiacco in 1934.
Alireza Zamani is an Iranian arachnologist and taxonomist.
Paratheuma is a genus of cribellate araneomorph spiders in the family Dictynidae, and was first described by E. B. Bryant in 1940. Originally placed with the ground spiders, it was transferred to the intertidal spiders in 1975, and to the Dictynidae in 2016.
Argenna is a genus of cribellate araneomorph spiders in the family Dictynidae, and was first described by Tamerlan Thorell in 1870.
Devade is a genus of cribellate araneomorph spiders in the family Dictynidae, and was first described by Eugène Simon in 1884. Originally placed with the Amaurobiidae, it was moved to the intertidal spiders in 1983, then to the Dictynidae in 1989.
Aituaria nataliae is the type species of Aituaria, a genus of araneomorph spiders of the family Nesticidae. It occurs in the steppes of the southern Urals.
Heser is a genus of ground spiders that was first described by T. K. Tuneva in 2004.
Sidydrassus is a genus of ground spiders that was first described by S. L. Esyunin & T. K. Tuneva in 2002. As of May 2019 it contains only three species: S. rogue, S. shumakovi, and S. tianschanicus.
Trachyzelotes is a genus of ground spiders that was first described by H. Lohmander in 1944 as a subgenus of Zelotes, and was raised to genus status in 1967. It has a body length of 3 to 13 millimetres.
Stemonyphantes is a genus of sheet weavers that was first described by Anton Menge in 1866.
Uralophantes is a monotypic genus of European sheet weavers containing the single species, Uralophantes troitskensis. It was first described by S. L. Esyunin in 1992, and is only found in Europe.
