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3113 Views 3 Replies Last post: Dec 22, 2011 2:55 AM by Lewis RSS
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Dec 21, 2011 1:00 PM

ID please looks like Black Widow but no red marks?

Hi,

 

We've just found this spider in a bookcase which was stored in the garage for a few years (in the same location as my husbands military kit, which has been all over the world...)  This spider is freaking me out a bit.  Is it a false widow, is it dangerous?

 

Thanksphoto.JPG

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    Dec 21, 2011 4:28 PM (in response to Sunbean)
    Re: ID please looks like Black Widow but no red marks?

    I would expect this to be one of the False widow spiders (Steatoda sp). rather than a Black Widow spider (Latrodectus sp.), but can't guarantee from this image. It will most likely be Steatoda grossa, which is arguably the most Widow-like of the six False Widow species - but how do you tell? Well the black widow species usually will have a distinct hour glass red marking on the belly and the False Widows do not, also Black Widows truly are pitchy black in colour whereas false widows are purple-ish brown if you look closely. Usually I would have no hesitation in identify an image like this of a spider found in a garage as Steatoda grossa but as overseas travel is mentioned it would be best to have a closer look - still 99.9% likely to be Steatoda grossa, which is as I say purple-ish brown never truly a pitchy black.

     

    HTH

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    • I don't know. Some people have all the luck.
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