Steatoda grossa

False Black Widow

Habitat:
This is a harmless common spider in and around homes. Unfortunately, it is often confused with the Black Widow. This specimen was found in a Madison basement.

References

Wikipedia Steatoda grossa

The World Spider Catalog, Version 6.5
American Museum of Natural History
by Norman I. Platnick
Edited by Peter Merrett, H. Don Cameron

Nearctic Spiders Database
David Shorthouse

Spiders of North America: an identification manual
Edited by Darrell Ubick, Pierre Paquin, Paula E. Cushing, and Vince Roth

The American Arachnological Society

The International Society of Arachnology

Arachnology Home Page