Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Upcoming Events

Discussion of 2018 gathering

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

Wood Pile Spider - Steatoda grossa - female

Wood Pile Spider - Steatoda grossa - Female
Bonney Lake, Pierce County, Washington, USA
June 21, 2008
I'm pretty sure this is triangulosa. I found about 2 or three of these in the wood pile.

Coloration is highly, highly variable in this species but juveniles and males are rarely all dark. - Rod Crawford.

Based on Rod's thoughts and the number or grossa adults in the wood pile, this is a juvenile grossa.

I think
its a juvenile famale grossa also. Based on the ones that I keep as pets, its possible its just a recently molted juvenile. There wasn't a size listed for this pic though. I'm NOT an expert, but based on my observations of my grossas, and the fact that you and I actually live in round-about the same area... probably grossa. ??

Thanks Mandy
If you look above the spider you will see that this one has already been placed at S. grossa, which means we've already decided on species.

You were right, Eric.
Rod says this can easily be a juvenile grossa. Based on the number of adult grossas in the pile, I'd say that's probably what it was.

Not so sure.
There is certainly wide variation in the color and pattern of individuals in this genus, but I think this may be a different species. Let's see what others say....

and I always send a link to Rod Crawford. He is a wonderful help with spiders of the NW. I'll post what he thinks as soon as I find out.

Comment viewing options
Select your preferred way to display the comments and click 'Save settings' to activate your changes.