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TaxonomyBrowse
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Species Steatoda borealis

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Classification
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 borealis (Steatoda borealis)
Explanation of Names
Latin for "northern"
Size
Females reaching a maximum size of about 7 mm
Identification
The abdomen is reddish brown with a lighter "T" shaped mark at the front end. The underside of the abdomen is also considerably lighter than the upper side.
Range
East of the Rocky Mountains in the United States to Alaska. Typically in northern states, but has recently been found in southern ones over the past 50 years or so.
Habitat
Most likely to be found under bark and stones, in rock crevices, on bridges and in outbuildings and unfinished basements.
Life Cycle
Click on the image below to see the life cycle.
Remarks
This species is native to North America.