andyk's picture

Spider

Observed: 12th February 2011 By: andyk
London Natural History Society
andyk is knowledgeable about Invertebratesandyk’s earned reputation in Invertebratesandyk’s earned reputation in Invertebratesandyk’s earned reputation in Invertebratesandyk’s earned reputation in Invertebratesandyk’s earned reputation in Invertebrates
spider - dorsal (scale = 1mm)
spider - ocelli
spider - cephalus
spider - abdomen ventral
spider - epigyne
Description:

Found under dead wood lying on the ground surface.

Identifications
  •  
    Likely ID
    Amaurobius sp. (immature)
    Confidence: It's likely to be this, but I can't be certain.
Species interactions

No interactions present.

Comments

andyk's picture

Thanks Alan.

Thanks Alan.

Andy Keay

Martin Harvey's picture

Amaurobius

Hi Alan, I'd agree it's Amaurobius but not sure whether it is immature or adult. I'm a bit puzzled by the size as well - if that's a 1mm scale in the first photo then the spider is over 2cm long, which is enormous for Amaurobius.

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Entomologist and biological recorder

andyk's picture

Scale

The scale is 1 mm divided into 10 i.e. each numbered division = 1/10 mm

Sorry for any confusion.

Andy Keay

Martin Harvey's picture

size

... in which case it is less than 3mm long, which I guess must mean it is an immature specimen, assuming that it is Amaurobius!

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Entomologist and biological recorder

Alan Thornhill's picture

also -

- the rather translucent legs and lack of a noticeable epigyne made me think it was immature

Martin Harvey's picture

immature

Thanks Alan, I wasn't sure whether the epigyne was developed or not, I still find it quite hard to judge whether spiders are adult or not!

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Entomologist and biological recorder