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Home > Pictures of Spiders > Picture 136348

Unidentified

Picture ID 136348

Picture of unidentified spider

Comments & ID Thoughts

It’s pretty big!

  • Submitted by: 
    NancyD
  • Submitted: Apr 20, 2021
  • Photographed: Apr 18, 2021
  • Spider: Unidentified
  • Location: Selbyville , Delaware, United States
  • Spotted Outdoors: Under rock, log, or debris
  • Found in web?: No
  • Attributes:
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LocalEntomologist

Nice find! Most likely Steatoda grossa.

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LittleSlingLover

This is a Black Widow. Either L. mactans (Southern) or L. variolus (Northern). One of the ways to tell these two species apart are the red/orange spots on its back. Unfortunately, this spiders spots are too difficult to make out.

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LocalEntomologist

Thanks for correcting me! How did you tell this apart from a false widow? I’ve seen some that have fairly flat black colouration, so I assumed it was a false widow.

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LittleSlingLover

False widows in NA don’t get this jet black in color. The red/orange spots on its back are also not found on any Steatoda’s or Asagena’s, if I remember correctly. Steatoda’s will usually have some sort of reddish-brown hue to them. Sometimes a greenish hue due to their translucency. Black Latrodectus spp. typically aren’t that translucent, almost a solid black. Steatoda spp. are also a lot hairier than Latrodectus spp., especially on the abdomen and legs. Another thing that is referred to in separating these species has to do with the robustness of the legs. Mainly, I will look at… Read more »

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LocalEntomologist

Thanks for your reply!

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NancyD

Thanks! I had no idea what it was!!

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