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

Genus Theridiosoma

tiny spider - Theridiosoma gemmosum egg, egg sack, pupa? - Theridiosoma gemmosum egg sac - Theridiosoma gemmosum Theridiosoma unknown cocoon - Theridiosoma Suspended - Theridiosoma gemmosum spider and prey - Theridiosoma Theridiosoma gemmosum Egg Sac? - Theridiosoma gemmosum
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Chelicerata (Chelicerates)
Class Arachnida (Arachnids)
Order Araneae (Spiders)
Infraorder Araneomorphae (True Spiders)
No Taxon (Entelegynae)
Family Theridiosomatidae (Ray Spiders)
Genus Theridiosoma
Range
gemmosum - Holarctic (USA & Canada)
savannum - USA

The genus comprises a world fauna of perhaps 30 species, of which only T. gemmosum is represented in Canada. (1)
See Also

Mysmenidae separates out from Theridiosomatidae by having tarsi as long as or longer than metatarsi.
Internet References
~ books.google.com - Image and information on web structure.

~ books.google.com - Drawing and information on egg sac.
Works Cited
1.The Orb-weaving Spiders of Canada and Alaska - The Insects and Arachnids of Canada Part 23
Dondale, C.D., J.H. Redner, P, Paquin and H.W. Levi. 2003. NRC Research Press.