Need spider i.d

bugmankeith

Arachnoking
Old Timer
Joined
Jun 4, 2006
Messages
2,731
A blackish-brown spider I found in my basement. It has 4 dots on top of it's abdomen. Sometimes I find them hanging in webs, other times they make a small web on the ground and wait under it.

No markings underneath.

 

jsloan

Arachnoangel
Old Timer
Joined
Jun 22, 2004
Messages
972
The picture doesn't show enough of the right parts to be 100% sure of the species, but your spider closely resembles a male Steatoda borealis (Theridiidae), a common cobweb spider that finds its way into houses from time to time. Actually, I'm being cautious. I'm about 99% sure that's what you've got. :)

Those four marks on the top of the abdomen aren't dots. They're small depressions where internal muscles are attached on the inside of the abdomen.

Here's a male S. borealis which you can compare with your spider:

http://bugguide.net/node/view/241288
 

bugmankeith

Arachnoking
Old Timer
Joined
Jun 4, 2006
Messages
2,731
That looks like it, females are usually fatter than the one I found. Thanks!
 

revilo

Arachnoknight
Joined
Feb 2, 2010
Messages
173
hi silberrücken,

nice to read you ;)

does hacklemesh weaver mean the family amaurobiidae ?

cheers, oli
 

Silberrücken

Arachnoangel
Joined
Feb 17, 2010
Messages
875
Hi Oli, and yes it does... I should have been more clear on the ID... :8o

It is good to see you too, Oli, hope all for you is well! :)

bye, S.
 
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