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Species Steatoda borealis

Little Black Spider - Steatoda borealis Holy palps, Batman! - Steatoda borealis - male Spider - Steatoda borealis - male Pretty Spider - Steatoda borealis Steatoda? - Steatoda borealis - female Steatoda spiderling - Steatoda borealis - female Captive spider SK 30 - Steatoda borealis - male Steatoda borealis - male
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"
Females reaching a maximum size of about 7 mm
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.
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.
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.
This species is native to North America.