Steatoda grossa
(False Black Widow)

Picture ID 53709

Picture of Steatoda grossa (False Black Widow) - Dorsal

Comments & ID Thoughts

Hello All,
This little guy bit me about 4 days ago, the bite area has gotten progressively worse. Shading has gotten darker ( light purple but not deep purple or black) . Im aware that the Brown Recluse is not native to the SoCal area. Im in a considerable amount of pain but nothing that isnt manageable. Im scratching my head at what type of spider this is and if i need to seek the attention of my primary physician. I have been applying antibiotic ointment regularly for about two days now.

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TangledWebJamesccalloway Recent comment authors
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TangledWeb
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Hi, this is a false widow, possibly Steatoda grossa. They are in the same family as black widows (Theridiidae). The venom isn’t as strong to humans, but is still painful and possibly necrotic. The severity of your reaction can depend on your immune system. It is possible to be allergic to spider venom in addition to the regular reaction. The fangs of a spider have bacteria on them, like most surfaces on Earth. The fangs break your skin and introduce bacteria to your body. That’s another immune system reaction. Antibiotic lotion may not be effective on anaerobic bacteria that are… Read more »

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