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

Register · Log In
HomeGuideID RequestRecentFrassForumsDonateHelp
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

Calendar
Upcoming Events

Registration is open for the 2024 BugGuide gathering in Idaho July 24-27

Moth submissions from National Moth Week 2023

Photos of insects and people from the 2022 BugGuide gathering in New Mexico, July 20-24

Photos of insects and people from the Spring 2021 gathering in Louisiana, April 28-May 2

Photos of insects and people from the 2019 gathering in Louisiana, July 25-27

Photos of insects and people from the 2018 gathering in Virginia, July 27-29


Previous events
TaxonomyBrowseInfoImagesLinksBooksData
Home » Guide » Arthropods (Arthropoda) » Chelicerates (Chelicerata) » Arachnids (Arachnida) » Spiders (Araneae) » True Spiders (Araneomorphae) » Entelegynae » Orb Weavers (Araneidae) » Araneus » Araneus andrewsi
Photo#575077
Steatoda grossa? - Araneus andrewsi
Copyright © 2011 inmybackyard

Steatoda grossa? - Araneus andrewsi
San Francisco Bay Area County, California, USA
September 11, 2011
Size: Abdomen is 1.5 cm
I think this is an S. grossa; it was in my back yard on the edge of a wooden play structure. It's quite black, though the inside of the leg joints are red.
tag · login or register to post comments
Contributed by inmybackyard on 11 September, 2011 - 9:02pm
Last updated 22 August, 2014 - 6:37pm

Moved
Moved from Araneus.
Similar to:
… Laura P., 22 August, 2014 - 6:37pm login or register to post comments

Moved
Moved from ID Request. I'm afraid your ventral image was not of much use... so I frassed it.
… Lynette Elliott, 12 September, 2011 - 8:45am login or register to post comments

 
Photo of inside leg joints
I had that photo posted because it showed the red leg joints. I'll repost it if it's useful to anyone.
… inmybackyard, 12 September, 2011 - 12:01pm login or register to post comments

 
No help
No, that image doesn't help. Just the comment that the leg joints are red is good enough. I'm not sure Levi even mentions that in any of his descriptions.
… Lynette Elliott, 12 September, 2011 - 2:59pm login or register to post comments

 
Kind of
looks like mites on the legs, anyway.
… John R. Maxwell, 12 September, 2011 - 3:15pm login or register to post comments

Araneus sp.
This is a female orb weaver in the genus Araneus. I think it might be A. andrewsi. Compare with

… Lynette Elliott, 12 September, 2011 - 8:45am login or register to post comments

 
Black?
I agree the abdomen shape looks like it; it certainly has the twin points/humps. But what about the black color? All the A. andrewsi pics I can find are very brown, and usually patterned instead of solid.

Then again, maybe it's Araneus gemma? http://www.sdnhm.org/fieldguide/inverts/aran-gem.html has a pic of a similar one at the top of the page, though mine has no patterns on her legs.
… inmybackyard, 12 September, 2011 - 12:04pm login or register to post comments

 
Coloring can vary
That's why I left this at genus level for now. It would take me quite some time and some review reading to place this to species with certainty.... and even then I might not be able to place it.
… Lynette Elliott, 12 September, 2011 - 2:58pm login or register to post comments

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

Disclaimer: Dedicated naturalists volunteer their time and resources here to provide this service. We strive to provide accurate information, but we are mostly just amateurs attempting to make sense of a diverse natural world. If you need expert professional advice, contact your local extension office.

Contributors own the copyright to and are solely responsible for contributed content.
Click the contributor's name for licensing and usage information.
Everything else copyright © 2003-2024 Iowa State University, unless otherwise noted.

Bugguide is hosted by:

Plant Pathology, Entomology and Microbiology at Iowa State University logo

Printer Friendly Version 		Terms of Use
Privacy Statement
Site Map
Contact