Crevice weaver spiders (Filistatidae) comprise cribellate spiders with features that have been regarded as "primitive" for araneomorph spiders. They are weavers of funnel or tube webs. The family contains 18 genera and more than 120 described species worldwide.
Castianeira is a genus of ant-like corinnid sac spiders first described by Eugen von Keyserling in 1879. They are found in Eurasia, Africa, and the Americas, but are absent from Australia. Twenty-six species are native to North America, and at least twice as many are native to Mexico and Central America.
Hogna is a genus of wolf spiders with more than 200 described species. It is found on all continents except Antarctica.
Diguetia is a genus of coneweb spiders that was first described by Eugène Simon in 1895. Members of this genus are six-eyed spiders that are either white or patterned. They are common in the southwestern United States and Mexico, and one species is found in Argentina. In the United States, species have been found in Arizona, California, Nevada, New Mexico, and Texas. These spiders build a tubular retreat at the tip of their tent-like webs. Once an insect is caught in the web, the spider bites it and injects venom to stop its prey from moving, later wrapping it in silk. Both males and females use stridulation while mating, with females also stridulating when harassed. Two species of jumping spiders feed on its eggs. There are eleven Diguetia species.
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.
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.
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.
Erigone is a genus of dwarf spiders that was first described by Jean Victoire Audouin in 1826. They are carnivorous, preying on small insects such as psylla and flies. One of the distinctive characters for this genus is the presence of teeth bordering the carapace.
Ummidia is a genus of mygalomorph spiders in the family Halonoproctidae, and was first described by Tamerlan Thorell in 1875.
Frontinella is a genus of dwarf spiders that was first described by Frederick Octavius Pickard-Cambridge in 1902.
Eucteniza is a genus of trapdoor spiders in the family Euctenizidae containing at least 14 species occurring in Mexico and the southern United States. Species are distinguished by a softened rear portion of the carapace, and males possess large spines on the first two pairs of walking legs that are used to hold females during mating. Like other trapdoor spiders they create burrows with a hinged lid, from which they await passing insects and other arthropods to prey upon. Many species are known from only one or two localities, or from only male specimens. More species are expected to be discovered. Eucteniza is closely related to spiders of the genera Entychides and Neoapachella.
Linyphia is a genus of dwarf spiders that was first described by Pierre André Latreille in 1804. The name is Greek, and means "thread-weaver" or "linen maker".
Elaver is a genus of sac spiders first described by Octavius Pickard-Cambridge in 1898.
Septentrinna is a genus of corinnid sac spiders first described by A. B. Bonaldo in 2000.
Ischnothele, also known as scatter-web spiders is a genus of spiders in the family Ischnothelidae. It was first described by Anton Ausserer in 1875.
Trachelas is a genus of araneomorph spiders originally placed with the Trachelidae, and later moved to the Corinnidae.
Grammonota is a genus of dwarf spiders that was first described by James Henry Emerton in 1882.
Ischnothelidaeis a family of mygalomorph spiders. It was first described as a subfamily of the family Dipluridae by F.O. Pickard-Cambridge in 1897 and raised to a family by Opatova et al. in 2020. They are also known as scatter-web spiders.
