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The family Dipluridae, known as curtain-web spiders (or confusingly as funnel-web tarantulas, a name shared with other distantly related families [2]) are a group of spiders in the infraorder Mygalomorphae, that have two pairs of booklungs, and chelicerae (fangs) that move up and down in a stabbing motion.
Oonopidae, also known as goblin spiders, is a family of spiders consisting of over 1,600 described species in about 113 genera worldwide, [1] with total species diversity estimated at 2000 to 2500 species. [2] The type genus of the family is Oonops Keyserling, 1835. Goblin spiders are generally tiny, measuring about 1 to 3 millimeters.
Pimoidae is a small family of araneomorph spiders first described by Jörg Wunderlich in 1986. [2] As re-circumscribed in 2021, it is monophyletic, [1] and contained 86 species in two genera. [3] It is closely related to the Linyphiidae, [1] [4] and is sometimes treated as synonymous with that family. [5]
Lycosoidea is a clade or superfamily of araneomorph spiders.The traditional circumscription was based on a feature of the eyes. The tapetum is a reflective layer at the back of the eye, thought to increase sensitivity in low light levels.
Leptonetidae is a family of small spiders adapted to live in dark and moist places such as caves. [1] The family is relatively primitive having diverged around the Middle Jurassic period. [2] They were first described by Eugène Simon in 1890. [3]
Cybaeidae is a family of spiders first described by Nathan Banks in 1892. [1] The diving bell spider or water spider Argyroneta aquatica was previously included in this family, but is now in the family Dictynidae. [2] [3]
Most of the species within this group have six eyes, as opposed to most other spiders. Spiders in the genus Tetrablemma (Tetrablemmidae) have only four eyes, as do some members of the family Caponiidae; caponiids may even have only two eyes. However, spiders in the family Plectreuridae have the normal eight eyes. [1]
Pacullidae is a family of araneomorph spiders first described by Eugène Simon in 1894. [1] It was merged into Tetrablemmidae in 1958, [2] [3] then raised back to family status after a large phylogenetic study in 2017. [4]