The spider family Liphistiidae, recognized by Tamerlan Thorell in 1869, comprises 8 genera and about 100 species of medium-sized spiders from Southeast Asia, China, and Japan. They are among the most basal living spiders, belonging to the suborder Mesothelae. In Japan, the Kimura spider is well known.
Heptathela is a genus of spiders that includes the Kimura spider. They are trapdoor spiders of the family Liphistiidae and are found in Japan, including Okinawa and the Ryukyu Islands. Spiders of this genus lack venom glands.
Dictynidae is a family of cribellate, hackled band-producing spiders first described by Octavius Pickard-Cambridge in 1871. Most build irregular webs on or near the ground, creating a tangle of silken fibers among several branches or stems of one plant.
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.
Iwogumoa is a genus of Asian funnel weavers first described by Kyukichi Kishida in 1955.
Paratheuma is a genus of cribellate araneomorph spiders in the family Dictynidae, and was first described by E. B. Bryant in 1940. Originally placed with the ground spiders, it was transferred to the intertidal spiders in 1975, and to the Dictynidae in 2016.
Hackmania is a genus of cribellate araneomorph spiders in the family Dictynidae, and was first described by Pekka T. Lehtinen in 1967. As of May 2019 it contains only two species: H. prominula and H. saphes.
Lathys is a genus of cribellate araneomorph spiders in the family Dictynidae, and was first described by Eugène Simon in 1884. It is a replacement name for "Lethia" Menge, 1869 because that name was already in use as a synonym for a genus of moths.
Mizaga is a genus of West African cribellate araneomorph spiders in the family Dictynidae, and was first described by Eugène Simon in 1898. As of May 2019 it contains only two species, both found in Senegal: M. chevreuxi and M. racovitzai. Originally placed with the funnel weavers, it was moved to Dictynidae in 1967.
Qiyunia is a monotypic genus of Asian cribellate araneomorph spiders in the family Dictynidae containing the single species, Qiyunia lehtineni. It was first described by D. X. Song & Y. J. Xu in 1989, and has only been found in China and in Japan.
Gongylidioides is a genus of Asian dwarf spiders that was first described by R. Oi in 1960.
Kagurargus is a monotypic genus of Asian dwarf spiders containing the single species, Kagurargus kikuyai. It was first described by H. Ono in 2007, and has only been found in Japan.
Nipponotusukuru is a genus of Asian dwarf spiders that was first described by H. Saito & H. Ono in 2001.
Oilinyphia is a genus of Asian dwarf spiders that was first described by H. Ono & H. Saito in 1989.
Ryojius is a genus of Asian sheet weaver spiders that was first described by H. Saito & H. Ono in 2001. As of May 2019 it contains only three species, found in China, Japan, and Korea: R. japonicus, R. nanyuensis, and R. occidentalis.
Tmeticodes is a monotypic genus of Japanese sheet weavers containing the single species, Tmeticodes gibbifer. It was first described by H. Ono in 2010, and is only found in Japan.
Tojinium is a monotypic genus of Japanese sheet weavers containing the single species, Tojinium japonicum. It was first described by H. Saito & H. Ono in 2001, and is only found in Japan.
Nojimaia is a monotypic genus of East Asian comb-footed spiders containing the single species, Nojimaia nipponica. It was first described by H. Yoshida in 2009, and is found in Japan and China.
Yaginumena is a genus of comb-footed spiders that was first described by H. Yoshida in 2002. As of June 2020 it contains three species, found in Asia and Turkey: Y. castrata, Y. maculosa, and Y. mutilata.
