Oonopidae, also known as goblin spiders, is a family of spiders consisting of over 1,600 described species in about 113 genera worldwide, with total species diversity estimated at 2000 to 2500 species. The type genus of the family is OonopsKeyserling, 1835.
Liocranidae is a family of araneomorph spiders first described by Eugène Simon in 1897. They are one of several groups called "sac spiders". The holarctic genus Agroeca is the best-known, but it also includes various genera of more obscure spiders that still lack a diagnosis. Two species in the North American genus Neoanagraphis are found in the extremely dry conditions in the Mojave, Sonoran and Chihuahuan deserts. Females live in animal burrows while males wander and are the ones most often caught in pitfall traps.
Cesonia is a genus of ground spiders that was first described by Eugène Simon in 1893.
Myrmekiaphila is a genus of North American mygalomorph trapdoor spiders in the family Euctenizidae, and was first described by G. F. Atkinson in 1886. All described species are endemic to the southeastern United States.
Coneweb spiders (Diguetidae) are six-eyed haplogyne spiders that live in tangled space webs, fashioning a cone-like central retreat where they hide and lay eggs. It is a small family, containing only two genera with fifteen species and is confined to the New World, preferring deserts. Members of the genus Diguetia usually build their webs in shrubs or between cactus pads. They have the same eye arrangement as the venomous recluse spiders, but none are known to be harmful to humans.
Caponiidae is a family of ecribellate haplogyne spiders that are unusual in a number of ways. They differ from other spiders in lacking book lungs and having the posterior median spinnerets anteriorly displaced to form a transverse row with the anterior lateral spinnerets. Most species have only two eyes, which is also unusual among spiders. A few species of Caponiidae variously have four, six or eight eyes. In some species the number of eyes will increase when the spiderling changes its skin as it grows towards adulthood.
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.
Herpyllus is a genus of ground spiders first described by Nicholas Marcellus Hentz in 1832.
Triaeris is a genus of goblin spiders erected by Eugène Simon in 1890 for the species Triaeris stenaspis. It was described from females from the Lesser Antilles; specimens were found later in heated greenhouses around Europe. No males of T. stenaspis have ever been found and the species may be parthenogenetic. Its taxonomy is confused, and the number of species that should be placed in the genus is unclear. In 2012, Norman I. Platnick and co-authors described the genus Triaeris as "an enigma wrapped around a mystery". They consider that most species assigned to the genus after Simon in 1890 and before 2012 do not belong to Triaeris.
Micaria is a genus of ground spiders that was first described by Niklas Westring in 1851. They are 1.3 to 6.5 millimetres long.
Orthonops is a genus of North American araneomorph spiders in the family Caponiidae, first described by R. V. Chamberlin in 1924.
Titiotus is a genus of American false wolf spiders that was first described by Eugène Louis Simon in 1897.
Sosticus is a genus of ground spiders that was first described by R. V. Chamberlin in 1922.
Anachemmis is a genus of North American false wolf spiders that was first described by Ralph Vary Chamberlin in 1919. It was briefly synonymized with Titiotus, but was reconfirmed as its own distinct genus in 1999.
Wulfila is a genus of ghost spiders first described by O. Pickard-Cambridge in 1895. They are easily recognized by their pale white elongated legs.
Drassinella is a genus of North American araneomorph spiders in the family Phrurolithidae, first described by Nathan Banks in 1904.
Socalchemmis dolichopus is a species of araneomorphae spider of the family Zoropsidae.
Myrmecicultor is a monotypic genus of North American spiders in the family Myrmecicultoridae. It contains the single species, Myrmecicultor chihuahuensis, and was first described by M. J. Ramírez, C. J. Grismado and D. Ubick in 2019. It is native to the Chihuahuan Desert, from the Big Bend region of Texas to Coahuila and Aguascalientes in Mexico. Collected specimens were found in pitfall traps where three species of harvester ants are most active: Pogonomyrmex rugosus, Novomessor albisetosis, and Novomessor cockerelli.
Cinetomorpha is a genus of goblin spiders first described by Eugène Louis Simon in 1892. It is a senior synonym of Lucetia, and Yumates.
