Skip navigation
3629 Views 12 Replies Last post: Dec 19, 2011 9:49 AM by bombuslucorum - Museum ID team RSS
Currently Being Moderated

Dec 14, 2011 9:22 PM

Steatoda grossa

Despite being a little short in the leg department I think this is a male Steatoda grossa. I am building a set of these photos to help me with my rather hit and miss identifications. Any obvious pointers would be welcome.

 

STA70108a.jpg

  • Currently Being Moderated
    Dec 15, 2011 1:28 PM (in response to Lewis)
    Re: Steatoda grossa

    Dear Lewis,

    I agree with you: it looks like Steatoda grossa. It's very similar to the photos on this page, especially the eigth photo from the top down. That is a female, and the one just above it is a male. When the pedipals are visible, I can tell males apart from females, but I can't see them well enough in your photo. Maybe an expert could confirm this?

    Thank you for posting the image.

    Yours truly,

    Florin

    • Report Abuse
      • Currently Being Moderated
        Dec 15, 2011 1:34 PM (in response to Lewis)
        Re: Steatoda grossa

        Hello,

        I think S. bipunctata. I don't see the ligher band at the base of the abdomen, but such dark body and legs striped with red are bipunctata, as far as I know.

        Bombuslucorum will no doubt shed light on these.

        Best wishes,

        Florin

        • Report Abuse
        • Currently Being Moderated
          Re: Steatoda grossa
          Almost certainly a female grossa (the main set of images) - the stripy legs are accentuated by the light/flash, in my experience female grossa rarely have a cream band around the front of the abdomen, whereas bipunctata almost always do as too does nobilis. A lot of these characters are 'jiz', alluding to the general look/feel of the example, though these do not always hold true. Only one way to be absolutely sure though Lewis and that would be to take a picture of the epigyne - now there's a challenge
          • Report Abuse
    • Currently Being Moderated
      Re: Steatoda grossa
      Yes, almost certainly a male grossa (the first picture). When mature this species is pretty much dimorphic, the females being plump and dark plummy-brown in colour and the males with this lighter coloured carapace and usually with good markings on the abdomen. Mature males are more likely to be seen out and about and 'on the hoof', whereas females are more sedentary, waiting for love to come a knocking. 
      • Report Abuse
      • Currently Being Moderated
        Re: Steatoda grossa

        Hi,

        I was hoping someone would be able to confirm what the spider is in these pictures? I think it might be S. Grossa female, from what i've seen on the internet? I have a 2 year old daughter and an 11 week old - do these spiders pose any risk to young children?

        Thanks.

        Attachments:
        • Report Abuse
  • Currently Being Moderated
    Dec 19, 2011 8:16 AM (in response to Lewis)
    Re: Steatoda grossa

    Hi,

    I found a spider in our wasing machine the other day and have been trying to identify it from the pictures on the internet. It could be Steatoda grossa, or Black Widow, quite how that managed to get into the washing machine i don't know. I have taken some pictures (attached) and I am hoping someone can help identify it, bearing in mind that it has been through a wash cycle!!

     

    Thanks.

    Dave

    Attachments:
    • Report Abuse

More Like This

  • Retrieving data ...

Bookmarked by (0)