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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#327283
Spider on tarp - Latrodectus geometricus
Copyright © 2009 Peter Bryant

Spider on tarp - Latrodectus geometricus
Costa Mesa, Orange County, California, USA
August 30, 2009

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Spider on tarp - Latrodectus geometricus Spider on tarp - Latrodectus geometricus
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Contributed by Peter Bryant on 31 August, 2009 - 12:11pm
Last updated 31 August, 2009 - 5:21pm

Moved
Moved from ID Request.
… john and jane balaban, 31 August, 2009 - 5:21pm login or register to post comments

ID
The spider is an adult female brown widow. We recorded them from Costa Mesa in 2006 or 2007. For additional So. CA. locations see:

Vincent, L. S., R. S. Vetter, W. J. Wrenn, J. K. Kempf, and J. E. Berrian. 2009. The brown widow spider Latrodectus geometricus C. L. Koch, 1841, in southern California. Pan-Pac. Entomol.84(4): 344-349
… Lenny Vincent, 31 August, 2009 - 3:09pm login or register to post comments

Lactrodectus geometricus (?), Brown Widow
This spider looks a lot like one of the Widows!

I am not very familiar with early instars of L. hesperus, the western widow, however, immature females of the Genus Lactrodectus can be colorful.

I will admit, this spider looks a lot like L. geometricus, a widely distributed introduction thought to originate in s. Africa and introduced to the US via Europe (more back tracking the origins may be necessary).

bill
… Bill Reynolds, 31 August, 2009 - 2:31pm login or register to post comments

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