Callobius is a genus of tangled nest spiders first described by R. V. Chamberlin in 1947.
Saltonia is a monotypic genus of North American cribellate araneomorph spiders in the family Dictynidae containing the single species, Saltonia incerta. It was first described by R. V. Chamberlin & Wilton Ivie in 1942, and has only been found in United States. Originally placed with the funnel weavers, it was moved to the Dictynidae in 1967.
Vaine Wilton Ivie was an American arachnologist, who described hundreds of new species and many new genera of spiders, both under his own name and in collaboration with Ralph Vary Chamberlin. He was employed by the American Museum of Natural History in New York. He also was a supporter of the Technocracy movement.
Spirembolus is a genus of North American sheet weavers that was first described by Ralph Vary Chamberlin in 1920.
Hololena is a genus of North American funnel weavers first described by R. V. Chamberlin & Willis J. Gertsch in 1929.
Cybaeina is a genus of North American araneomorph spiders in the family Cybaeidae, and was first described by R. V. Chamberlin & Wilton Ivie in 1932. Originally described from a single female found in Olympia, Washington, it was placed with the Cybaeidae in 1967.
Cybaeota is a genus of North American araneomorph spiders in the family Cybaeidae, and was first described by R. V. Chamberlin & Wilton Ivie in 1933. It was moved to the Cybaeidae in 1967.
Tricholathys is a genus of cribellate araneomorph spiders in the family Dictynidae, and was first described by R. V. Chamberlin & Wilton Ivie in 1935.
Yorima is a genus of araneomorph spiders in the family Cybaeidae, and was first described by R. V. Chamberlin & Wilton Ivie in 1942. Originally placed in the funnel weaver family, it was moved to the Dictynidae in 1967, and to the Cybaeidae in 2017.
Dirksia is a genus of araneomorph spiders in the family Cybaeidae, and was first described by R. V. Chamberlin & Wilton Ivie in 1942 as a subgenus of Ethobuella. Originally placed with the funnel weavers, it was elevated to genus and moved to the dwarf sheet spiders in 1967, then moved to the Cybaeidae in 2017. As of May 2019 it contains only two species: D. cinctipes and D. pyrenaea.
Anacornia is a genus of North American dwarf spiders that was first described by Ralph Vary Chamberlin & Vaine Wilton Ivie in 1933. As of May 2019 it contains only two species, both found in the United States: A. microps and A. proceps.
Disembolus is a genus of North American dwarf spiders that was first described by Ralph Vary Chamberlin & Vaine Wilton Ivie in 1933.
Eulaira is a genus of North American dwarf spiders that was first described by Ralph Vary Chamberlin & Vaine Wilton Ivie in 1933.
Helophora is a genus of dwarf spiders that was first described by Anton Menge in 1866.
Tivodrassus is a genus of Mexican ground spiders that was first described by Ralph Vary Chamberlin & Vaine Wilton Ivie in 1936. Originally placed with the long-spinneret ground spiders, it was transferred to the ground spiders in 2018.
Linyphantes is a genus of North American dwarf spiders that was first described by Ralph Vary Chamberlin & Vaine Wilton Ivie in 1942.
Oaphantes is a monotypic genus of North American dwarf spiders containing the single species, Oaphantes pallidulus. It was first described by Ralph Vary Chamberlin & Vaine Wilton Ivie in 1943, and has only been found in the United States.
Tachygyna is a genus of North American sheet weavers that was first described by Ralph Vary Chamberlin & Vaine Wilton Ivie in 1939.
Tibioplus is a genus of sheet weavers that was first described by Ralph Vary Chamberlin & Vaine Wilton Ivie in 1947. As of June 2019 it contains only two species, both found in Scandinavia, Alaska, Siberia, East Asia, and Kyrgyzstan: T. diversus and T. tachygynoides.
Piabuna is a genus of North American araneomorph spiders first described by R. V. Chamberlin & Wilton Ivie in 1933. Originally added to the Liocranidae, it was moved to the Corinnidae in 2002, then to the Phrurolithidae in 2014.
