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For Insects, Spiders & Their Kin
For the United States & Canada
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Species Steatoda grossa - False Black Widow

False Black Widow - Steatoda grossa - female False Black Widow - Steatoda grossa - female Indoor spider - Steatoda grossa - male Unknown Spider - Steatoda grossa Steatoda grossa? - Steatoda grossa - male Another Steatoda grossa? - Steatoda grossa - male UNK Spider - Steatoda grossa Cobweb spider - Steatoda grossa - female
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Chelicerata (Chelicerates)
Class Arachnida (Arachnids)
Order Araneae (Spiders)
Infraorder Araneomorphae (True Spiders)
No Taxon (Entelegynes )
Family Theridiidae (Cobweb Spiders)
Genus Steatoda
Species grossa (False Black Widow)
Synonyms and other taxonomic changes
Teutana grossa

Some diagnostic drawings:

General habitus

Male palp:

Female epigyne:

Eye arrangement (male):
Imported from Europe; In North America it has now been found in states along the east and west coasts as well as those bordering the Great Lakes. Specimens have also been collected in Colorado. It's also considered a cosmopolitan species and is found in other countries all over the world.
In and around homes and buildings.
Males mature in summer and autumn; adult females can be found year-round.
Any arthropods that are snagged in the cobweb. This species is a specialist on pill bugs and real black widow spiders.
Life Cycle
Female Life Cycle:

The bite of this spider might produce symptoms that are similar but much less severe than those of a black widow bite. In some cases blistering may form at the site of the bite along with physical discomfort that lasts for several days.
Internet References - range. - How to Manage Pests of Homes, Structures, People, and Pets by R. S. Vetter