Chalkie's picture

6.4 136

Observed: 6th April 2012 By: ChalkieChalkie’s reputation in InvertebratesChalkie’s reputation in InvertebratesChalkie’s reputation in Invertebrates
6.4 136
6.4.12 spider from under paving CC

Several of these found under paving slabs on gravel in the garden. About 1.5 to 2cm long.

Species interactions

No interactions present.


Chalkie's picture

That's great, thanks!

Lace-webbed spider is great - and a very speedy identification, thank you. Further research shows that being a female lace-webbed spider is a bad plan - apparently the babies eat the mother...

chrisbrooks's picture


Sounds horrendous, all that effort to be eaten.

Chalkie's picture


I've tried googling images (I know - not too reliable) of both linyphia and amaurobis and it looks much more like the amaurobis to me (linyphia legs look too long and the head/thorax doesn't look quite right either). Thank you for looking at suggesting possibilities, as I was completely at a loss for where to start. And now I know a bit about both these spider genera.

Alan Thornhill's picture


It's certainly an Amaurobius but according to some sources the habitat is more likely to indicate fenestralis. None of the readily visible markings are reliable for separating A.f. from A.s. so Amaurobius sp would be the safe ID

chrisbrooks's picture


Hi Alan, good to have your knowledgeable input. I did some research before posting my ID and my findings were as follows. If in gardens or houses likely to be A. similis and if in woodland A. fenestralis. Your comments would be most welcome. Regards Chris

Alan Thornhill's picture

Hi Chris

As examples I offer the following says
"If you find one in a house it is likely to be Amaurobius similis. If you find one in a garden or outdoors it is likely to be Amaurobius fenestralis."

This site - says
"A. fenestralis. This latter species is, in effect, the 'outdoor' equivalent of A. similis; both of these species inhabit cracks and crevices, but the latter exploits those of human dwellings."

However, I can find some sites which more or less say the opposite. They're not species I've investigated and so, like you, I tend to be guided by the internet but it seems it isn't very consistent - which is why I feel 'sp.' is safer.

Chalkie's picture


Amaurobius sp will do me just fine! Thanks for the research. I've found the spider and harvestman recording scheme website, which has lots of interesting info (but wasn't much use for distinguishing between these two!) Disappointing how few spiders are easily identifiable without killing them though.