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Home » Guide » Arthropods (Arthropoda) » Arachnids (Arachnida) » Spiders (Araneae) » True Spiders (Araneomorphae) » Entelegynes » Cobweb Spiders (Theridiidae) » Widow Spiders (Latrodectus) » Brown Widow (Latrodectus geometricus)
Photo#163218
A different brown widow - Latrodectus geometricus - female
Copyright © 2007 Susan Wise-Eagle

A different brown widow - Latrodectus geometricus - Female
San Diego, San Diego County, California, USA
December 28, 2007
Size: 10+ mm

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A different brown widow - Latrodectus geometricus - female A different brown widow - Latrodectus geometricus - female
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Contributed by Susan Wise-Eagle on 31 December, 2007 - 9:04am
Last updated 21 January, 2008 - 5:27pm

Moved
Moved from Widow spiders.
… Jeff Hollenbeck, 21 January, 2008 - 5:27pm login or register to post comments

Moved
Moved from Spiders.
… john and jane balaban, 21 January, 2008 - 4:32pm login or register to post comments

The
shape of the hourglass is typical of the brown widow, so you're right about it not being a black widow.
Adult female.
… Jeff Hollenbeck, 31 December, 2007 - 3:00pm login or register to post comments

The shape of the hour-glass i
The shape of the hour-glass is typical for Latrodectus hesperus, our common Black Widow. I have seen a few females that still show some juvenile markings, but I suspect that your is just a juvenile female.
… Dennis Haines, 31 December, 2007 - 12:36pm login or register to post comments

 
Latrodectus hesperus often ha
Latrodectus hesperus often has the little red bump at the posterior margin of the hourglass, while I believe that L. geometricus lacks this character. Have you seen egg sacs? Those would be very telling.
… Dennis Haines, 2 January, 2008 - 11:38am login or register to post comments

 
Dennis,
this is an adult female geometricus, not hesperus.
You are wrong.
… Jeff Hollenbeck, 2 January, 2008 - 5:29pm login or register to post comments

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