Sheetweb Spider - Drapetisca alteranda [1]
Family: Linyphiinae - 2nd largest family of spiders after Salticidae. Commonly called sheetweb spiders.
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Sheetweb Spider - Drapetisca alteranda
Sheetweb spider walking on its web

Linyphiidae is the second largest family of spiders after Salticidae.  Comprised of 4,300 described species in 578 genera, this family is poorly known because of their small size.  Commonly called sheetweb spiders (subfamily Linyphiinae) and dwarf spiders (subfamily Erigoninae).

Sheetweb Spider
Spider's freshly spun silk

Sheetweb Spider
This spider is suspended on her sheet web, upon which she can move very rapidly.
References
  1. Bugguide.net, Drapetisca alteranda
  2. Arthur V. Evans, National Wildlife Federation Field Guide to Insects and Spiders & Related Species of North America (Sterling, 2007).
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