Steatoda grossa
(False Black Widow)

Picture ID 8255

Comments & ID Thoughts

No idea what kind of spider this is! New to Southern California and spotted this sucker in my bathtub. I have seen them before, but this time I’m curious enough to submit a photo.

Submitted by:
pddamb
Submitted: Mar 31, 2018
Photographed: Mar 31, 2018
Spider: Steatoda grossa (False Black Widow)
Sex:
Male,
Maturity:
Adult
Location: Long Beach, California, United States
Spotted Indoors: Sink or bathtub
Found in web?: No
Attributes: Dorsal

3 Comments

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ryneaeiel

April 5, 2018 8:02 pm

I believe this to be an (possibly male) immature Steatoda grossa, aka false black widow. They’re non-native and harmless to people, and are extremely common in California. This is a picture of an immature S. grossa:
http://nathistoc.bio.uci.edu/spiders/ad_m_7209.jpg

PDdaMB

Photo Owner

Reply to ryneaeiel

April 10, 2018 6:16 pm

Thank you for the response!

ItsyBitsy

Moderator

Reply to ryneaeiel

April 24, 2018 10:08 am

Agree, filed. Well except for the harmless part, I’d go with mostly harmless. Like most spiders they have venom but are unlikely to bite except in self defense and not considered to be of medical significance, everyone’s immune system is different though. Welcome to Spider ID. 🙂