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. Genera , the World Spider Catalog accepts the following genera: Aituaria Esyunin & Efimik, 1998 — Ukraine, Russia, Georgia Canarionesticus Wunderlich, 1992 — Canary Is. Carpathonesticus Lehtinen & Saaristo, 1980 — Europe, Asia Cyclocarcina Komatsu, 1942 — Japan Domitius Ribera, 2018 — Spain, Portugal, Italy Eidmannella Roewer, 1935 — North America, Spain, Japan Gaucelmus Keyserling, 1884 — Mexico, Central America, Jamaica Hamus Ballarin & Li, 2015 — Tibet Kryptonesticus Pavlek & Ribera, 2017 — Europe, New Zealand Nescina Ballarin & Li, 2015 — China Nesticella Lehtinen & Saaristo, 1980 — Asia, Africa, Oceania, Brazil Nesticus Thorell, 1869 — Asia, Africa, Cuba, North America, South America, Europe Pseudonesticus Liu & Li, 2013 — China Speleoticus Ballarin & Li, 2016 — China, Japan Typhlonesticus Kulczyński, 1914 — Europe Wraios Ballarin & Li, 2015 — China The following extinct genera have been placed in the Nesticidae: †Balticonesticus Wunderlich, 1986 – Palaeogene, Baltic amber †Eopopino Petrunkevitch, 1942 – Palaeogene, Baltic and Bitterfeld amber †Heteronesticus Wunderlich, 1986 – Palaeogene, Baltic amber †Hispanonesticus Wunderlich, 1986 – Neogene, Dominican amber See also List of Nesticidae species References