Ground spiders comprise Gnaphosidae, the seventh largest spider family with over 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.
Cybaeidae is a family of spiders first described by Nathan Banks in 1892. The diving bell spider or water spider Argyroneta aquatica was previously included in this family, but is now in the family Dictynidae.
Ralph Vary Chamberlin was an American biologist, ethnographer, and historian from Salt Lake City, Utah. He was a faculty member of the University of Utah for over 25 years, where he helped establish the School of Medicine and served as its first dean, and later became head of the zoology department. He also taught at Brigham Young University and the University of Pennsylvania, and worked for over a decade at the Museum of Comparative Zoology at Harvard University, where he described species from around the world.
Dendryphantes is a genus of jumping spiders that was first described by Carl Ludwig Koch in 1837.
Mallos is a genus of cribellate araneomorph spiders in the family Dictynidae, and was first described by O. Pickard-Cambridge in 1902. Among the genus, Mallos gregalis is known to be a social spider species, living in groups and signaling each other by vibrating their web.
Linothele is a genus of South American curtain web spiders that was first described by Ferdinand Karsch in 1879.
Metepeira is a genus of orb-weaver spiders first described by F. O. Pickard-Cambridge in 1903. The name is derived from the Ancient Greek μετά and the obsolete genus name Epeira, denoting a genus similar to Epeira.
Agyneta is a genus of dwarf spiders that was first described by J. E. Hull in 1911.
Laminacauda is a genus of dwarf spiders that was first described by Alfred Frank Millidge in 1985.
Hapalotremus major is a species of tarantula, in the subfamily Theraphosinae. It is native to Peru.
Acanthogonatus is a genus of South American mygalomorph spiders in the family Pycnothelidae. It was first described by Ferdinand Anton Franz Karsch in 1880. Originally placed with the brushed trapdoor spiders, it was transferred to the funnel-web trapdoor spiders in 1985, then to the Pycnothelidae in 2020.
Auximella is a genus of South American tangled nest spiders first described by Embrik Strand in 1908.
Aljassa is a genus of South American anyphaenid sac spiders first described by Antônio Brescovit in 1997.
Nopsides is a monotypic genus of North American araneomorph spiders in the family Caponiidae, containing the single species, Nopsides ceralbonus. It is one of three nopine species, in addition to Tarsonops and Orthonops, described by Ralph Vary Chamberlin from specimens collected from the Baja California region and nearby islands in 1924. They are active during the night, hiding under large stones of Mexico's deserts and xeric shrublands during the day.
Chibchea is a genus of South American cellar spiders that was first described by B. A. Huber in 2000.
Sphecozone is a genus of sheet weavers that was first described by Octavius Pickard-Cambridge in 1871.
Tutaibo is a genus of sheet weavers that was first described by Ralph Vary Chamberlin in 1916.
Xenoctenidae is a family of araneomorph spiders separated from Miturgidae in 2017.
Trachelopachys is a genus of South American araneomorph spiders first described by Eugène Simon in 1897. Originally placed with the Corinnidae, it was moved to the Trachelidae in 2014.
Cinetomorpha is a genus of goblin spiders first described by Eugène Louis Simon in 1892. It is a senior synonym of Lucetia, and Yumates.
