Argyrodes, also called dewdrop spiders, is a genus of comb-footed spiders that was first described by Eugène Louis Simon in 1864. They occur worldwide, and are best known for their kleptoparasitism. They can spin their own webs, but tend to invade and reside in their hosts' webs. This relationship can be commensal or even mutual if the dewdrop spider feeds on small trapped insects that are not eaten by the host. Some species can even prey upon the host.
Hetschkia is a monotypic genus of Brazilian comb-footed spiders containing the single species, Hetschkia gracilis. It was first described by Eugen von Keyserling in 1886, and is found in Brazil.
Craspedisia is a genus of comb-footed spiders that was first described by Eugène Louis Simon in 1894. As of May 2020 it contains three species, found in China, the Dominican Republic, and Brazil: C. cornuta, C. longioembolia, and C. spatulata.
Thwaitesia is a genus of comb-footed spiders that was first described by Octavius Pickard-Cambridge in 1881.
Bertrana is a genus of Central and South American orb-weaver spiders first described by Eugen von Keyserling in 1884. It includes some of the smallest known araneid orb-weavers. Bertrana striolata females are 4.5 mm long or less. The eight eyes are in two rows. The abdomen is white on top and on the sides, with multiple hieroglyphic-like lines and bars of many different shapes and length. In females, these are red, in males, black.
Cryptachaea is a genus of spiders in the Theridiidae family.
Acacesia is a genus of orb-weaver spiders first described by Eugène Simon in 1895. It contains six species with a mostly neotropical distribution, ranging from South America to Mexico. One species, A. hamata, is found in the US as well.
Segestrioides is a genus of South American coneweb spiders that was first described by Eugen von Keyserling in 1883. Originally placed with the recluse spiders, it was moved to the coneweb spiders in 1983.
Phoroncidia is a genus of comb-footed spiders that was first described by J. O. Westwood in 1835.
Taczanowskia is a genus of orb-weaver spiders first described by Eugen von Keyserling in 1879. Contrary to the common name of the group, spiders of the genus Taczanowskia do not build webs and are furtive hunters, deceiving their prey by producing sex pheromones that attract male moths, and catching their prey by using a pair of enlarged claws at the tip of their anterior legs.
Metagonia is a genus of cellar spiders that was first described by Eugène Louis Simon in 1893.
Pseudotyphistes is a genus of South American sheet weavers that was first described by Paolo Marcello Brignoli in 1972.
Helvibis is a genus of spiders in the family Theridiidae that was first described by Eugen von Keyserling in 1884. It is a senior synonym of Formicinoides.
Chthonos is a genus of South American ray spiders that was created by Jonathan A. Coddington in 1986 because the previous name was preoccupied. Originally placed with the Orb-weaver_spiders under the name Tecmessa, it was transferred to the ray spiders in 1986.
Wendilgarda is a genus of ray spiders that was first described by Eugen von Keyserling in 1886.
Acentroscelus is a genus of South American crab spiders that was first described by Eugène Louis Simon in 1886. It is a senior synonym of Whittickius.
Ceraarachne is a genus of South American crab spiders that was first described by Eugen von Keyserling in 1880.
Epicadinus is a genus of crab spiders that was first described by Eugène Louis Simon in 1895.
Epicadus is a genus of crab spiders that was first described by Eugène Louis Simon in 1895. It is considered a senior synonym of Tobias.
Plato is a genus of ray spider. The American biologist Jonathan A. Coddington named and circumscribed the genus in 1986. It is a Neotropical genus and it is limited to South America. As of 2018, nine species are recognized. They are found in caves and have a distinctive cubic egg sac. The generic name comes from the ancient Greek philosopher Plato.
