The
Leptonetid spiders (Family Leptonetidae) include 15 genera and nearly 200 species of relatively primitive haplogyne (lacking hardened external female genitalia)
spiders. The family is poorly known to anybody but specialists. Leptonetids are generally tiny, have six eyes arranged in a semicircle of four in front and two posteriorly. Many live in caves or in leaf litter. They are found around the
Mediterranean, and in
Eurasia,
Japan and the
New World.
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