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Spider - Philoponella oweni - female

Spider - Philoponella oweni - Female
Madera Canyon, Arizona, USA
July 20, 2008
Size: ~6 mm
Found by a stream, with an egg sac, in a nearly horizontal orb web--at the time I assumed it was a tetragnathid, but I just browsed through all the images in that family and didn't see anything similar. No luck browsing the araneid genera either.

Images of this individual: tag all
Spider - Philoponella oweni - female Spider - Philoponella oweni - female Spider - Philoponella oweni - female

Moved from Cribellate Orb Weavers. I arrived at the ID using the paper cited on the guide page; I contacted the author and she agreed with my assessment.

Moved to Uloboridae. I hope someone can confirm... I just came across a drawing of the egg sac of Uloborus americanus (which the World Spider Catalog lists as a "nomina dubia") that looked identical to the one in this spider's web. The fact that it was a horizontal orb web is good supporting evidence, and the ID should be clinched by the presence of a cribellum--which I think I am seeing in the ventral shot, but I have very little knowledge of spider anatomy.

For what it's worth, the Nearctic Spider Database only lists two uloborids for Arizona: Philoponella arizonica and P. oweni.

I'm glad you found it. You might have the first images on the web?

other angle
Do you have a picture from the top?

not really
She was hanging upside down and pretty low to the ground, so I couldn't get under. I've added an image that shows a slightly different angle of the abdomen, but I don't have any that show the face.

added angle
should be enough to go on...I'm just drawing a blank.

not really a match, but the only thing that I can think of that's a bumpy spider like this is Gea heptagon.

That's the closest thing I had been able to find by browsing through the genera, but in addition to its not being a perfect match, it looks like that genus (from BugGuide data anyway) is only found in the east.

small bumpy spiders
more bumpy spiders: genus Kaira, genus Allocyclosa, Cyclosa, Cyrtophora, Mastophora. I left off the spikey choices.

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