Steatoda borealis

Picture ID 203257

Comments & ID Thoughts

Additional photo to my previous submission. The spider fell into the plant's runoff water, exposing it's underbelly.

Submitted by:
garden_spider
Submitted: Mar 19, 2025
Photographed: Mar 16, 2025
Spider: Steatoda borealis
Location: Michiana Shores, Indiana, United States
Spotted Indoors: Basement or Cellar
Found in web?: Yes
Attributes: Ventral

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BugmanDan

March 19, 2025 5:53 pm

I am thinking Steatoda grossa, maybe not full adult.

TangledWeb

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Reply to BugmanDan

March 19, 2025 11:21 pm

It looks like S. borealis to me. https://bugguide.net/node/view/1081559 They appear to be a common Steatoda species in Indiana. I have a lot of them in my city too. They have a pale ventral abdomen. I didn’t look at Ventral photos of S. grossa though. I’ll do that now.

TangledWeb

Moderator

Reply to TangledWeb

March 19, 2025 11:41 pm

Here’s S. grossa, ventral. https://www.insecte.org/forum/viewtopic.php?t=153995 It looks the same on various websites. I’m going to go with S. borealis.