Western Spotted Orbweaver

Subject: Spider Tucson
Location: urban Tucson, AZ
November 11, 2014 2:43 pm
Two pics of a spider found in a co-worker’s house in Tucson AZ in late September 2014. People come to me with their bug questions, but I’m not knowledgable about spiders. If someone can just get it to a rough group of spiders that’d be great. Just curious. Thanks so much.
Signature: Margrit McIntosh

Western Spotted Orbweaver
Western Spotted Orbweaver

Dear Margrit,
We believe this is a female Western Spotted Orbweaver,
Neoscona oaxacensis, a highly variable species.  We matched your image to this image on BugGuide.  Orbweavers are in the family Araneidae, and they are a harmless family of spiders.  Orbweavers build large circular webs, the “classic” spider web.  Most Orbweavers are sexually dimorphic, with the females being much larger than the males.

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