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1149 Views 10 Replies Last post: Jul 20, 2012 11:53 AM by Gargoyle RSS
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Jul 13, 2012 4:11 PM

ID Please Is this a False Widow ?

I`m normally quite laid back but when I found this lady? under my compost bin the hairs  on the back of  my neck stood up.I was thinking of keeping it as it is quite stunning. Does anyone know how long they live and is it really a Steata Nobilis?

Side On!edit.JPG

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    Jul 13, 2012 2:28 PM (in response to Gargoyle)
    Re: ID Please Is this a False Widow ?

    It doesn't look like Steatoda Nobilis. It might perhaps be a Steatoda Bipuncta or Steatoda Grossa, but I'm not sure. Any chance of some better pics, perhaps looking down from above the abdomen?

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        Jul 13, 2012 7:40 PM (in response to Gargoyle)
        Re: ID Please Is this a False Widow ?

        When you say "Butterfly pattern" do you mean, like a paler, central stripe running doen the length of the abdomen? Or are there faint arrow like markings pointing towards the head?

         

        I still wouldn't like to call it from the photos, partly because I don't see enough of these, partly because it's hard to see markings due to "stuff" on the spider's body. It looks shorter legged like a Bipuncta (AKA Rabbit Hutch spider)

         

        It's not a Nobilis though & poses no risk (even Nobilis aren't dangerous, though a bite may not be a pleasant experience). Bipuncta are not typically reported as biters, Grossa can bite but as with most spider bites these are usually the result of spiders being trapped in clothing etc., rather than actively looking to do so.

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          Jul 19, 2012 1:13 PM (in response to Gargoyle)
          Re: ID Please Is this a False Widow ?

          Hi Gargoyle,

           

          Looking again at these pics, on a PC with a better screen, P1010059.JPG steers me now more towards Steatoda Grossa, as I see the faint arrow like marking on the abdomen you mention.

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              Jul 19, 2012 2:55 PM (in response to Gargoyle)
              Re: ID Please Is this a False Widow ?

              Hello there

              Definitely a female Steatoda grossa. You didn't say where you are located. They are pretty well established in the Southern half of the country now.

              Lewis

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                  Jul 20, 2012 12:05 AM (in response to Gargoyle)
                  Re: ID Please Is this a False Widow ?

                  Hello there.

                  Tonight at my Sister in laws house I saw what I assumed to be a Tegenaria's (House Spider) corner web well over 40 cm at the hypotenuse above my head next to their back door and security light. Always interested in this sort of sport I tickled the web with a long blade of grass. Instead of a Tegenaria the largest Steatoda noblis I have ever seen came scuttling out. The abdomen was at least 12/13mm in diameter with a leg span of about 40mm. My lovely Sister in law bravely said 'I suppose it is allright there' but I know that she is an Arachnophobe at heart so using a long stemmed wine glass I removed it from the web and relocated her in the shed at the end of the garden. Sadly I had no camera to record this fun series of events.

                  I find it amazing that in a few years the Steatoda's noblis and grossa seem to be one of the commonest species of spider in South London.

                  Lewis

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