Ipa is a genus of dwarf spiders that was first described by Michael I. Saaristo in 2007.
Linyphiidae, spiders commonly known as sheet weavers, or money spiders is a family of very small spiders comprising 4706 described species in 620 genera worldwide. This makes Linyphiidae the second largest family of spiders after the Salticidae. The family is poorly understood due to their small body size and wide distribution; 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. Since it is so difficult to identify such tiny spiders, there are regular changes in taxonomy as species are combined or divided.
Helsdingenia is a genus of dwarf spiders that was first described by Michael I. Saaristo & A. V. Tanasevitch in 2003. The name is a reference to Dr. P. J van Helsdingen.
Abiskoa is a monotypic genus of dwarf spiders containing the single species, Abiskoa abiskoensis. It was first described by Michael I. Saaristo & A. V. Tanasevitch in 2000, and has only been found in Europe, East Asia, and China.
Anguliphantes is a genus of dwarf spiders that was first described by Michael I. Saaristo & A. V. Tanasevitch in 1996.
Ascetophantes is a monotypic genus of Asian dwarf spiders containing the single species, Ascetophantes asceticus. It was first described by A. V. Tanasevitch & Michael I. Saaristo in 2006, and has only been found in Nepal.
Claviphantes is a genus of Asian dwarf spiders that was first described by A. V. Tanasevitch & Michael I. Saaristo in 2006. As of May 2019 it contains only two species, both found in Nepal: C. bifurcatoides and C. bifurcatus.
Decipiphantes is a monotypic genus of dwarf spiders containing the species Decipiphantes decipiens. It was first described by Michael I. Saaristo & A. V. Tanasevitch in 1996, and has only been found in Belarus, Kazakhstan, Mongolia, and Russia.
Fistulaphantes is a monotypic genus of Asian dwarf spiders containing the single species, Fistulaphantes canalis. It was first described by A. V. Tanasevitch & Michael I. Saaristo in 2006, and has only been found in Nepal.
Flagelliphantes is a genus of dwarf spiders that was first described by Michael I. Saaristo & A. V. Tanasevitch in 1996. It was originally erected to contain three species, all found in Russia: F. bergstromi, F. flagellifer, and F. sterneri. In 2023, F. yunxia from Jilin province, China was assigned to this genus.
Formiphantes is a monotypic genus of dwarf spiders containing the single species, Formiphantes lephthyphantiformis. It was first described by Michael I. Saaristo & A. V. Tanasevitch in 1996.
Improphantes is a genus of dwarf spiders that was first described by Michael I. Saaristo & A. V. Tanasevitch in 1996.
Indophantes is a genus of Asian dwarf spiders that was first described by Michael I. Saaristo & A. V. Tanasevitch in 2003.
Mansuphantes is a genus of dwarf spiders that was first described by Michael I. Saaristo & A. V. Tanasevitch in 1996.
Obscuriphantes is a genus of dwarf spiders that was first described by Michael I. Saaristo & A. V. Tanasevitch in 2000.
Piniphantes is a genus of dwarf spiders that was first described by Michael I. Saaristo & A. V. Tanasevitch in 1996.
Sachaliphantes is a monotypic genus of Asian sheet weavers containing the single species, Sachaliphantes sachalinensis. It was first described by Michael I. Saaristo & A. V. Tanasevitch in 2004, and has only been found in Japan, Korea, China, and Russia.
Spiralophantes is a monotypic genus of Asian sheet weavers containing the single species, Spiralophantes mirabilis. It was first described by A. V. Tanasevitch & Michael I. Saaristo in 2006, and has only been found in Nepal.
Theoa is a genus of sheet weavers that was first described by Michael I. Saaristo in 1995.
Vagiphantes is a monotypic genus of Asian sheet weavers containing the single species, Vagiphantes vaginatus. It was first described by Michael I. Saaristo & A. V. Tanasevitch in 2004, and is only found in Asia.
