Theridiidae, also known as the tangle-web spiders, cobweb spiders and comb-footed spiders, is a large family of araneomorph spiders first described by Carl Jakob Sundevall in 1833. This diverse, globally distributed family includes over 3,000 species in 124 genera, and is the most common arthropod found in human dwellings throughout the world.
Theridion is a genus of tangle-web spiders with a worldwide distribution. Notable species are the Hawaiian happy face spider (T. grallator), named for the iconic symbol on its abdomen, and T. nigroannulatum, one of few spider species that lives in social groups, attacking prey en masse to overwhelm them as a team.
The spider genus Spintharus occurs from the northeastern United States to Brazil. Nicholas Marcellus Hentz circumscribed the genus in 1850, initially as a monospecific genus containing his newly described species S. flavidus.
Enoplognatha is a genus of comb-footed spiders that was first described by P. Pavesi in 1880. They have both a large colulus and a subspherical abdomen. Males usually have enlarged chelicerae. It is considered a senior synonym of Symopagia.
Paratheridula is a monotypic genus of comb-footed spiders containing the single species, Paratheridula perniciosa. The sole species was first described in 1886 under the name Theridion perniciosum. The genus was first described by Herbert Walter Levi in 1957, though it has been described under several different names, including Mysmena 4-maculata, Theridion quadrimaculatum, and Theridion arcadicum,
Rugathodes sexpunctatus is a minute species of spider in the family Theridiidae, the cobweb or tangle-web spiders. This family includes the medically important genus Latrodectus—the widow spiders. The species in the genus Rugathodes are too small to be dangerous to humans. Very little is known about most species in this genus.
Walckenaeria is a genus of dwarf spiders that was first described by John Blackwall in 1833. It is a senior synonym of Paragonatium, as well as Wideria, Cornicularia, Prosopotheca, Tigellinus, and Trachynella.
Platnickina is a genus of comb-footed spiders that was first described by A. Ö. Koçak & M. Kemal in 2008.
Lasaeola is a genus of comb-footed spiders that was first described by Eugène Louis Simon in 1881. The type species was described under the name Pachydactylus pronus, but was renamed Lasaeola prona when it was discovered that the name "Pachydactylus" was preoccupied. Both this genus and Deliana were removed from the synonymy of Dipoena in 1988, but many of these species require more study before their placement is certain.
Agyneta is a genus of dwarf spiders that was first described by J. E. Hull in 1911.
Robertus is a genus of comb-footed spiders that was first described by Octavius Pickard-Cambridge in 1879. It is considered a senior synonym of Garritus.
Phylloneta is a genus of comb-footed spiders formerly considered a sub-genus of Allotheridion, and raised to genus status in 2008. The type species was first described by Eugen von Keyserling in 1884 as Theridion pictipes. As of September 2019 it contains three species and two subspecies with a holarctic distribution: P. impressa, P. pictipes, P. sisyphia, P. s. foliifera, and P. s. torandae.
Diplocentria is a genus of dwarf spiders that was first described by J. E. Hull in 1911.
Oreonetides is a genus of dwarf spiders that was first described by Embrik Strand in 1901.
Canalidion is a monotypic genus of tangle-web spiders containing the single species, Canalidion montanum. The species was first described by James Emerton in 1882 under the name Theridion montanum. J. Wunderlich moved it to its own genus in 2018, because it had more teeth on the anterior margin of the cheliceral furrow, a basal depression of the cymbium, and an embolus positioned dorsally. It has a holarctic distribution.
Jamaitidion is a monotypic genus of comb-footed spiders containing the single species, Jamaitidion jamaicense. The genus was first described by J. Wunderlich in 1995, and is found on the Greater Antilles. The sole species of this genus was described by Herbert Walter Levi in 1959. It was originally placed in Theridion, but was moved to its own genus based on unique features of the epigynum.
Paidiscura is a genus of comb-footed spiders that was first described by Allan Frost Archer in 1950.
Ruborridion is a monotypic genus of Asian comb-footed spiders containing the single species, Ruborridion musivum. The species was first described under the name Theridion musivum in 1873. The genus was described by J. Wunderlich in 2011. They are found in India and in the mediterranean area
Thymoites is a genus of comb-footed spiders that was first described by Eugen von Keyserling in 1884.
Wamba is a genus of comb-footed spiders that was first described by Octavius Pickard-Cambridge in 1896. As of September 2019 it contains three species, found in the Americas, including the Caribbean: W. congener, W. crispulus, and W. panamensis.
