Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
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Upcoming Events

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Photos of insects and people from the 2013 gathering in Arizona, July 25-28

Photos of insects and people from the 2012 gathering in Alabama

Photos of insects and people from the 2011 gathering in Iowa

Photos from the 2010 Workshop in Grinnell, Iowa

Photos from the 2009 gathering in Washington


Family Linyphiidae - Sheetweb and Dwarf Spiders

Sheetweb Weaver - male spider Hammock Spider - Pityohyphantes subarcticus - male Sheet Web Spider- Neriene digna - Neriene digna - male Arcuphantes arcuatulus? - Arcuphantes arcuatulus - female Helophora insignis - female Grammonota pallipes - male Sheetweb Spider - female
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Chelicerata (Chelicerates)
Class Arachnida (Arachnids)
Order Araneae (Spiders)
Infraorder Araneomorphae (True Spiders)
No Taxon (Entelegynes )
Family Linyphiidae (Sheetweb and Dwarf Spiders)
In separating Theridiidae from Linyphiidae (1)
1. Legs
    Theridiidae have first legs usually longest, third legs shortest. Also fourth legs usually with comb macrosetae (indistinct in Dipoena & Euryopis). Legs have no thick setae and no femoral macrosetae.
    Linyphiidae have legs long & thin with macrosetae. (Hairs on males somewhat reduced.) They have long sensory hairs on the first three legs, sometimes on all four legs.

2. Abdomen
    Theridiidae have abdomen usually round, rarely elongate.
    Linyphiidae abdomen usually oval or elongated.
Works Cited
1.Spiders of North America: An Identification Manual
D. Ubick, P. Paquin, P.E. Cushing and V. Roth (eds). 2005. American Arachnological Society.