Steatoda grossa
(False Black Widow)

Picture ID 7719

Picture of Steatoda grossa (False Black Widow) - Dorsal

Comments & ID Thoughts

This spider made it's nest in an enclosure for a Pixie Frog that we purchased from a local exotic pet store. I've never seen a spider like this in Northern California before so I don't know if it is an escapee from the pet store and if I need to notify them or if it's a normal species that I just have never seen in my 36 years in Northern California. Any help would be greatly appreciated. Thank you in advance.

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ItsyBitsy

Hi, welcome to Spider ID. 🙂 This looks like a False Black Widow, Steatoda grossa. This species is established in many countries across the world and states including California.

Additional Pictures

Picture of Steatoda grossa (False Black Widow) Enlarge Picture
Picture of Steatoda grossa (False Black Widow) - Dorsal Enlarge Picture
Picture of Steatoda grossa (False Black Widow) - Male - Dorsal Enlarge Picture
Picture of Steatoda grossa (False Black Widow) Enlarge Picture