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