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Photo#259205
Mimetidae (Pirate spiders) egg sac - Ero

Mimetidae (Pirate spiders) egg sac - Ero
Baiting Hollow, Suffolk County, New York, USA
March 17, 2009
Size: ca 6 mm. (sans "stalk")
Found on the underside of a rock at the edge of the vegetable garden.

Unable to see details I almost passed this by.
Does anyone have an idea on who made this beautiful construction? Spider perhaps?

Images of this individual: tag all
Mimetidae (Pirate spiders) egg sac - Ero Mimetidae (Pirate spiders) egg sac - Ero

Rod Crawford said
"...the egg sac photos could be either canionis or furcata, more
likely the latter."

Spider, yes
This is an egg sac of Ero, a pirate spider. It's a beauty, all right!

 
spider - Ero
Thanks Charlie.
I've never seen the spider. I think I'll bring the rock inside if I can find something to contain it.

 
Info
how do you tell apart from the others, say Mimetus? Color, size, construction? Just curious.

 
Color, mostly
Mimetus = bright orange; only other genus (with one species) is Reo, with pale yellowish white egg sacs. It's theoretically possible that there's a Mimetus species with an undescribed egg sac that looks just like an Ero egg sac, but, well, this looks just like an Ero egg sac: pale with outer covering of coarse, curly, reddish brown silk.

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