Currently viewing the category: "Cobweb Spiders"
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Subject: False Widow?
Location: San Francisco Bay Area, U.S.
February 22, 2014 10:23 pm
Hello there-
I found this lovely lady (?) up in a corner near the ceiling of our San Francisco garage/basement (we live on a hill, so that wall is actually subterranean). There’s a similar but smaller spider nearby that I can’t get a good picture of because it’s tucked to far into a corner. I can’t guarantee how true the color are as the pic was taken with a flash. I was initially intrigued by the spider because it looked quite black in the dark and we do get the occasional widow in this region, but now that I’ve seen it up close, I’m wondering if it might be a Steatoda grossa?
Signature: SnorkMaiden

False Widow

False Widow

Dear Snorkmaiden,
We agree that your spider looks like the False Widow pictured on BugGuide
Your individual appears to be an immature female, and when she matures, she will lose the markings on the abdomen and BugGuide has nice images of the female life cycle.

Good to know. Many thanks for the response!

What's That Bug? does not endorse extermination

Subject: Unknown Spider
Location: Torrance, California
January 28, 2014 4:39 pm
Hello Bugman,
I need some help identifying this recently deceased spider. My 6-year-old son found it in a corner of my house after we came back from a long vacation. It was shiny brown, with white stripes on its back, and about a penny size. It had made a small, irregular web, and was living just a few feet away from a Brown Widow (also deceased, sorry). I have never seen this kind of spider before, and have not been able to find a match on the Internet.
Thanks.
Signature: Daniel

Immature Brown Widow

Immature Brown Widow

Hi Daniel,
This looks to us like an immature Brown Widow.  See BugGuide for a comparison image.

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Subject: Spider question again
Location: Gunung Manglayang, West Java, Indonesia
October 18, 2013 11:23 pm
Hello Daniel,
I got a question about a spider again, and I only got one decent photo of it.
In term of size… it’s a relatively small spider about 1 to 1,5 cm toe to toe, and I found it hide behind a banana leave.
Hope that whatsthatbug could help identifying this guy :)
Signature: Mohamad Idham Iskandar

Unknown Spider from Indonesia

Spiny Theridiid Spider from Indonesia

Hi Mohamad,
We are sorry about the delay.  We have been very busy and we somehow overlooked your request.  We do not recognize your spider, but we will post the image and hopefully one of our readers will write in with an identification.

Karl provides a classification
Hi Daniel and Mohamad:
I believe this is a comb-footed spider (Theridiidae), also known as tangle-web or cobweb spiders. As far as I can tell, the black blade-like hairs at the end of the abdomen are characteristic of two genera, Chrysso and Meotipa. Christa l. Deeleman-Reinhold refers to them as spiny theridiids. Unfortunately, that is as far as I could get, as I could find no online photos or descriptions that pointed me to any particular genus or species. Nicky Bay Photography has posted numerous excellent images from Singapore that come close, most identified as Chrysso sp. or just Theridiidae. You can click here or here to check out two good examples. Project Noah also provides an image of a similar spider from India that it identifies as Chrysso sp. Regards.  Karl

Thanks so much for doing this intensive research Karl.

Wow thanks a lot Daniel and Karl for the clue…, first time seeing this spider and for me that is really interesting.

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Subject: strange spider
Location: United Kingdom, midlands
October 13, 2013 1:03 am
Hi, I found this spider living on my brussel plants in july/August never seen one like this before, can you tell me what it is
Signature: automatically

Cobweb Spider

Candystripe Spider

Dear automatically,
We have identified your Cobweb Spider in the family Theridiidae as
Enoplognatha ovata.  You can find some nice matching images of this variably colored spider on Nick’s Spiders of Britain and Europe.  You can view some of the color variations on BugGuide.  According to Eurospiders, it is commonly called the Candystripe Spider.

Thanks for your help, this is a great service will reccomend to others

What's That Bug? does not endorse extermination

Subject: Spider eating a cockroach in LA
Location: Los Angeles
August 19, 2013 6:57 pm
Hi,
We recently started renovations on our garage here in Los Angeles. I couldn’t help but take a picture of this spider eating a cockroach on the side of our garbage can. I can’t figure out what spider it is. Can you help? Thanks! Megan. (in Los Angeles).
Signature: Megan.

Brown Widow eats Cockroach

Brown Widow eats Cockroach

Hi Megan,
Your spider is an introduced Brown Widow,
Latrodectus geometricus.  According to BugGuide:  “World wide in the tropical zone. It was introduced in Florida and has since been observed moving north through Georgia, and into South Carolina; it has also been officially recorded in California, Alabama, Mississippi, and Texas.  Habitat Found around buildings in tropical climates.(1) However, it is an introduced species and is the most human-adapted of the species occurring in the South Eastern US. Its webs may occur anywhere there is sufficient space to make one. It may be extremely abundant on houses and other man-made structures (e.g., barns, fences, guard rails, bridges). It reproduces frequently and disperses rapidly, making it nearly impossible to control.”  As with other introduced species, which we consider Invasive Exotics, the Brown Widow might be contributing to a loss of species diversity by displacing native species where it has been introduced.

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Subject: What spider is this?
Location: Southern Spain
April 10, 2013 3:42 am
Hello!
Just curious what this spider is. Although it didn’t look like it was going to tear my face off or lay eggs in my eyes (so I wasn’t too worried), it was slightly different to most spiders I’ve come across, and I was wondering if you knew what it was?
Relatively small, maybe an inch long at most, quite slender, jet black and didn’t seem to be all that good at climbing walls. Very large teeth in comparison to the rest of it’s body.
(Not the best picture, sorry!)
Thanks!
Signature: Scott

Spider

Spider

Hi Scott,
As you indicated, your photo is quite blurry, but it does reveal some interesting features, including the large pedipalps that indicate this is a male spider.  We believe it might be an Ant Mimic Spider in the family Corinnidae.  We are requesting assistance from Mandy Howe who volunteered to help us with spider identifications.

Mandy Howe identifies Cobweb Spider
Hi Daniel,
The Spain spider with the large palps and constricted abdomen looks a lot like something in the genus Coleosoma, of family Theridiidae.  They’re cobweb spiders that also seem to mimic ants, though only the males look like this. The females of the genus look more like a regular cobweb spider with a bulbous abdomen.
We have some Coleosoma in North America that you can compare images to: http://bugguide.net/node/view/51778/bgpage.
However, to my knowledge, the only species in that genus that might be found in Spain is the cosmopolitan Coleosoma blandum.  If it’s not that species, then I’m not sure what it would be in Spain. It could be some other genus in the same family.  Unfortunately, my experience with spiders found in Spain is somewhat limited.  Based on a checklist of Iberian Spiders (by Cardoso & Morano 2010), I don’t see Coleosoma blandum listed, but it is considered a cosmopolitan species, so I think it can pop up all over the place.
That’s the best I can do just based on the silhouette of the spider, at least. But I’ve showed it to the British Arachnological Society listserv, so I might be able to change/correct that ID if anyone replies.  There are folks on there that are more familiar with Spanish and European spiders.  So stand by and I’ll let you know if/when someone replies. :-)

What's That Bug? does not endorse extermination