Linyphiidae is a family of very small spiders comprising 4694 described species in 623 genera worldwide. This makes Linyphiidae the second largest family of spiders after the Salticidae. The family is poorly known; new genera and species are still being discovered throughout the world. The newest such genus is Himalafurca from Nepal, formally described in April 2021 by Tanasevitch. Because of the difficulty in identifying such tiny spiders, there are regular changes in taxonomy as species are combined or divided.
Scylaceus is a genus of North American sheet weavers that was first described by S. C. Bishop & C. R. Crosby in 1938. As of May 2019 it contains only two species, both found in Canada and the United States: S. pallidus and S. selma.
Ceratinopsidis is a monotypic genus of North American dwarf spiders containing the single species, Ceratinopsidis formosa. It was first described by S. C. Bishop & C. R. Crosby in 1930, and has only been found in United States.
Cheniseo is a genus of North American dwarf spiders that was first described by S. C. Bishop & C. R. Crosby in 1935.
Coreorgonal is a genus of North American dwarf spiders that was first described by S. C. Bishop & C. R. Crosby in 1935. As of May 2019 it contains only three species in the United States and Canada: C. bicornis, C. monoceros, and C. petulcus.
Floricomus is a genus of North American dwarf spiders that was first described by C. R. Crosby & S. C. Bishop in 1925.
Gnathonargus is a monotypic genus of North American dwarf spiders containing the single species, Gnathonargus unicorn. It was first described by S. C. Bishop & C. R. Crosby in 1935, and has only been found in the United States.
Gnathonaroides is a monotypic genus of North American dwarf spiders containing the single species, Gnathonaroides pedalis. It was first described by S. C. Bishop & C. R. Crosby in 1938, and has only been found in Canada and the United States.
Goneatara is a genus of North American dwarf spiders that was first described by S. C. Bishop & C. R. Crosby in 1935.
Sciastes is a genus of sheet weavers that was first described by S. C. Bishop & C. R. Crosby in 1938.
Scirites is a genus of North American sheet weavers that was first described by S. C. Bishop & C. R. Crosby in 1938. As of May 2019 it contains only two species: S. finitimus and S. pectinatus.
Scironis is a genus of North American sheet weavers that was first described by S. C. Bishop & C. R. Crosby in 1938. As of May 2019 it contains only two species, both found in the United States: S. sima and S. tarsalis.
Scolopembolus is a monotypic genus of North American sheet weavers containing the single species, Scolopembolus littoralis. It was first described by S. C. Bishop & C. R. Crosby in 1938, and has only been found in the United States.
Scyletria is a monotypic genus of North American sheet weavers containing the single species, Scyletria inflata. It was first described by S. C. Bishop & C. R. Crosby in 1938, and has only been found in Canada and the United States.
Sisicottus is a genus of sheet weavers that was first described by S. C. Bishop & C. R. Crosby in 1938. They can be found in moss and litter of conifer forests.
Sisicus is a genus of sheet weavers that was first described by S. C. Bishop & C. R. Crosby in 1938. As of June 2019 it contains only three species, found in North America, Europe, Siberia, and East Asia: S. apertus, S. penifusifer, and S. volutasilex.
Sisis is a genus of North American sheet weavers that was first described by S. C. Bishop & C. R. Crosby in 1938. As of May 2019 it contains only two species, both found in Canada and the United States: S. plesius and S. rotundus.
Sitalcas is a monotypic genus of North American sheet weavers containing the single species, Sitalcas ruralis. It was first described by S. C. Bishop & C. R. Crosby in 1938, and has only been found in the United States.
Smodix is a monotypic genus of North American sheet weavers containing the single species, Smodix reticulata. It was first described by S. C. Bishop & C. R. Crosby in 1938, and has only been found in Canada and the United States.
Traematosisis is a monotypic genus of American sheet weavers containing the single species, Traematosisis bispinosus. It was first described by S. C. Bishop & C. R. Crosby in 1938, and is only found in the United States.
