Ipa is a genus of dwarf spiders that was first described by Michael I. Saaristo in 2007.
Linyphiidae is a family of very small spiders comprising 4667 described species in 618 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 Yuelushannus from China, formally described in May 2020. Because of the difficulty in identifying such tiny spiders, there are regular changes in taxonomy as species are combined or divided.
Scaffold web spiders (Nesticidae) is a family of araneomorph spiders closely allied with tangle web spiders. Like the "Theridiidae", these spiders have a comb of serrated bristles on the hind tarsi that are used to pull silk bands from the spinnerets. It contains 16 genera and about 300 species, many of which are associated with caves or overhangs. The genus Nesticus is the type for the family and is found throughout the world. The related Eidmannella has speciated considerably in Texas caves and includes some extremely localized species that are considered threatened. One species, Eidmannella pallida, is found in caves and under overhangs, but also in agricultural fields and other habitats away from such restricted areas. The genus Carpathonesticus is found in central Eurasia.
Agroeca is a genus of liocranid sac spiders that was first described by Niklas Westring in 1861.
Semljicola is a genus of sheet weavers that was first described by Embrik Strand in 1906.
Scotinotylus is a genus of sheet weavers that was first described by Eugène Louis Simon in 1884.
Megalepthyphantes is a genus of dwarf spiders that was first described by J. Wunderlich in 1994.
Sidydrassus is a genus of ground spiders that was first described by S. L. Esyunin & T. K. Tuneva in 2002. As of May 2019 it contains only three species: S. rogue, S. shumakovi, and S. tianschanicus.
Anguliphantes is a genus of dwarf spiders that was first described by Michael I. Saaristo & A. V. Tanasevitch in 1996.
Caviphantes is a genus of dwarf spiders that was first described by R. Oi in 1960.
Centromerus is a genus of dwarf spiders that was first described by David B. Hirst in 1886.
Glyphesis is a genus of dwarf spiders that was first described by Eugène Louis Simon in 1926.
Incestophantes is a genus of dwarf spiders that was first described by A. V. Tanasevitch in 1992.
Locketiella is a genus of Southeast Asian dwarf spiders that was first described by Alfred Frank Millidge & A. Russell-Smith in 1992. As of May 2019 it contains only two species, both found in Indonesia: L. merretti and L. parva.
Mecynargus is a genus of dwarf spiders that was first described by C. Chyzer & Władysław Kulczyński in 1894.
Minicia is a genus of dwarf spiders that was first described by Tamerlan Thorell in 1875.
Pelecopsis is a genus of dwarf spiders that was first described by Eugène Louis Simon in 1864.
Silometopoides is a genus of sheet weavers that was first described by K. Y. Eskov in 1990.
Stemonyphantes is a genus of sheet weavers that was first described by Anton Menge in 1866.
Kharitonovia is a genus of araneomorph spiders in the family Dictynidae, containing the single species, Kharitonovia uzbekistanica. It was first described by S. L. Esyunin, Alireza Zamani & T. K. Tuneva in 2017, and is only found in Iran and Uzbekistan.
