Latrodectus mactans
(Southern Black Widow)

Picture ID 23609

Picture of Latrodectus mactans (Southern Black Widow) - Dorsal

Comments & ID Thoughts

Got itself stuck on my patio right after I painted the concrete, so it was active at around 5 PM. I live in middle Tennessee and have seen black widows before, but this one is different.

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Jenhawkins1981ItsyBitsyTangledWeb Recent comment authors
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Jenhawkins1981
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Not all black widow spiders have an hourglass, and can have just the red dots like in your pic… Scary!

TangledWeb
Member

It may be a Northern black widow, Latrodectus mactans. There can be multiple species where you live and they have different markings. Markings can vary with age and gender also. The hourglass mark for black or brown widows is on the underside of the abdomen. That marking also varies.

ItsyBitsy
Moderator

I agree, it may be Latrodectus mactans – that’s the Southern Black Widow though, Northern is L. variolus.

Jenhawkins1981
Member

Thank you Tangled Web for clarifying that part of identifying a black widow for me. I always thought the hourglass was on the top, not the underside of the abdomen, so that was very helpful.

Additional Pictures

Picture of Latrodectus mactans (Southern Black Widow) - Female - Ventral Enlarge Picture
Picture of Latrodectus mactans (Southern Black Widow) - Female - Ventral Enlarge Picture
Picture of Latrodectus mactans (Southern Black Widow) - Ventral Enlarge Picture
Picture of Latrodectus mactans (Southern Black Widow) - Male - Dorsal Enlarge Picture