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Species Araneus gemma

Help IDing Spider - Araneus gemma JC's unkown spider - Araneus gemma Full Ventral - Araneus gemma - female orb - Araneus gemma voucher image - Araneus gemma - female voucher image - Araneus gemma - male Spider - Araneus gemma Spider - camoflaged like a dead leaf - Araneus gemma - female
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Chelicerata (Chelicerates)
Class Arachnida (Arachnids)
Order Araneae (Spiders)
Infraorder Araneomorphae (True Spiders)
No Taxon (Entelegynae)
Family Araneidae (Orb Weavers)
Genus Araneus
Species gemma (Araneus gemma)
Synonyms and other taxonomic changes
Explanation of Names
Latin for "bud" or "gem"
The female measures 10 to 12mm* long; male smaller than the female, measuring 6 to 8 mm long (1)
(*according to BugGuide records the female may be as large as 23 mm)
Female: carapace and abdomen vary in color from gray to brownish purple. The abdomen has anterior paired humps and may have a medial light stripe that varies in length.

Male: similar in color and pattern to the female.

Along the West coast of North America from southern Alaska to southern California and inland to western Montana. 1
Builds web in open areas of trees, large shrubs and around houses.
This species is thought to mate with A. gemmoides which creates a cross between those two species.
See Also
Araneus andrewsi has mottled brown abdomen; usually does not have the medial brown stripe on the abdomen.
Neoscona crucifera is more orange-brown, no abdominal medial stripe and no paired humps
Eriophora ravilla - This species also has a brown form with a central dorsal white line.
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.