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Home » Guide » Arthropods (Arthropoda) » Chelicerates (Chelicerata) » Arachnids (Arachnida) » Spiders (Araneae) » Unidentified Spider Egg Sacs, Webs, Retreats, and Droppings
Photo#478872
Spider Sac on Rock in NC
Copyright © 2010 adrostan

Spider Sac on Rock in NC
Connelly Springs, North Carolina, USA
December 10, 2010
Size: 1/2 inch
I believe this is a spider sac, but do not know what type of spider. Why would the sac be metallic? I have never seen a metallic spider sac. I would appreciate any information that might ID the type of spiders that create this type of sac. Thank You so Very Much!!
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Contributed by adrostan on 13 December, 2010 - 3:24am
Last updated 15 December, 2010 - 12:30pm

Moved
Moved from ID Request.
… John R. Maxwell, 15 December, 2010 - 12:30pm login or register to post comments

add ground spiders to the mix
see this Zelotes
… Lynette Elliott, 15 December, 2010 - 9:55am login or register to post comments

Hmm...
There are some reasonably similar egg cases in Corinnidae...



...but they don't appear as "metallic" as yours.

There are also slime molds that resemble your find...



...but I wouldn't expect to find them on rocks.

Let's see what others have to say.

In the meantime, welcome to BugGuide!
… Ken Wolgemuth, 13 December, 2010 - 6:15am login or register to post comments

 
Definitely a spider egg sac
You can see round bumps in the middle of the sac where individual eggs are bulging out. Castianeira egg sacs are metallic-looking, but I'm not sure if that's what this one is.
… Charley Eiseman, 13 December, 2010 - 10:21am login or register to post comments

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