The sac spiders of the family Clubionidae have a very confusing taxonomic history. Once, this family was a large catch-all taxon for a disparate collection of spiders, similar only in that they had eight eyes arranged in two rows and conical anterior spinnerets that touched, and were wandering predators that built silken retreats, or sacs, usually on plant terminals, between leaves, under bark, or under rocks. These are now recognized to include several families, some of which are more closely related to the three-clawed spiders, like lynx and wolf spiders, than to Clubionidae and related families.
The Agelenidae are a large family of spiders in the suborder Araneomorphae. Well-known examples include the common "grass spiders" of the genus Agelenopsis. Nearly all Agelenidae are harmless to humans, but the bite of the hobo spider may be medically significant, and some evidence suggests it might cause necrotic lesions, but the matter remains subject to debate. The most widely accepted common name for members of the family is funnel weaver.
Charippus is a genus of spiders in the jumping spider family, Salticidae.
Pimoidae is a small family of araneomorph spiders first described by J. Wunderlich in 1986. As re-circumscribed in 2021, it is monophyletic, and contained 85 species in two genera. It is closely related to the Linyphiidae, and is sometimes treated as synonymous with that family.
The Tiaojishan Formation is a geological formation in Hebei and Liaoning, People's Republic of China, dating to the middle-late Jurassic period. It is known for its exceptionally preserved fossils, including those of plants, insects and vertebrates. It is made up mainly of pyroclastic rock interspersed with basic volcanic and sedimentary rocks. Previously, the Tiaojishan Formation was grouped together with the underlying Haifanggou Formation as a single "Lanqi Formation." The Tiaojishan Formation forms a key part of the Yanliao Biota assemblage.
The Yixian Formation is a geological formation in Jinzhou, Liaoning, People's Republic of China, that spans about 1.6 million years during the early Cretaceous period. It is known for its fossils, listed below.
Cheiracanthiidae is a family of araneomorph spiders first described by Vladimir Wagner in 1887. The synonym Eutichuridae was used for a long time, but Cheiracanthiidae has priority. The largest genus currently recognized as belonging to this family is Cheiracanthium, which has previously been placed in both the Clubionidae and the Miturgidae.
Trachelidae is a family of araneomorph spiders first described by Eugène Simon in 1897 as a subfamily called "Tracheleae". The Trachelidae family, also known as "ground sac spiders", is within the group of spiders known as the RTA clade, which includes mostly wandering spiders that do not use webs. Spiders in the Trachelidae family are characterized as being 3-10mm long and having a red cephalothorax and a yellow/tan abdomen. They are commonly found indoors. It was placed in the family Clubionidae, then later in Corinnidae when the Clubionidae were split up. The first study that suggested Trachelidae should be considered its own family was done by Deeleman-reinhold in 2001 as part of an analysis of RTA Clade spiders. An analysis by Martín J. Ramírez in 2014 suggested that it was not closely related to other members of the Corinnidae, and was better treated as a separate family. It was then placed in the CTC clade of spiders, or the Claw Tuft Clasper clade, which is a group of spiders that have two tarsal claws with tufts of hair.
Nusatidia is a genus of Asian sac spiders first described by Christa L. Deeleman-Reinhold in 2001.
Pristidia is a genus of Asian sac spiders first described by Christa L. Deeleman-Reinhold in 2001.
Qiongthela is a genus of spiders in the family Liphistiidae. As of 2021, it contains 14 species.
Karstia is a genus of Asian ray spiders that was first described by H. M. Chen in 2010.
Troglocoelotes is a genus of east Asian funnel weavers. It was first described by B. Li, Z. Zhao and C. T. Zhang in 2019, and it has only been found in China.
Bucliona is a genus of sac spiders first described by Pierre L.G. Benoit in 1977. As of November 2021 it contains only three species: B. dubia, B. jucunda, and B. kirilli. It was synonymized with Clubiona in 1997, but was elevated back to genus in 2021. The type species was originally described under the name "Clubiona dubia".
Phintelloides is a genus of Asian jumping spiders erected by N. Kanesharatnam and Benjamin in 2019 after a molecular phylogenetic study of similar Asian Salticidae species. The single most likely cladogram shows that Phintelloides is sister to Phintella, with Proszynskia sister to both:
Femorbiona is a genus of Asian sac spiders first described by J. S. Zhang, H. Yu and S. Q. Li in 2021. As of November 2021 it contains only 3 species: F. brachyptera, F. phami, and F. shenzhen.
Sinocanthium is a monotypic genus of east Asian spiders in the family Cheiracanthiidae containing the single species, Sinocanthium shuangqiu. It was first described by J. S. Zhang, H. Yu and S. Q. Li in 2020, and it has only been found in China.
Sinostidia is a small genus of east Asian sac spiders. It was first described by J. S. Zhang, H. Yu and S. Q. Li in 2021, and it has only been found in China. As of November 2021 it contains only two species: S. dujiao and S. shuangjiao.
Hexamatia is a small genus of Asian dwarf sheet spiders first described by F. A. Rivera-Quiroz, B. Petcharad and J. A. Miller in 2020. As of December 2021 it contains only two species: H. seekhaow and H. senaria.
