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Spider Wish List

There is a very distinctly patterned Wamba species found in the eastern US. It's only 2 mm. I tried looking through the bugguide images to match it up, but couldn't find anything. Can you all keep yours eyes peeled for this little one?

I don't know if the abdomen was described before or after alcohol... so not sure that the abdomen is really black on white like the description. Legs are yellow... with black rings & spots... I assume it resembles Theridion species since that's where it was moved from.

Feel free to add any species to this wish list... so we can all remember what we'd like to find/add to the guide.

Genus Canalidion ~4 mm(one species - C. mantanum = Theridion montanum) - MT, MN, BC, Manitoba, AB, WA, OR, WY, UT, CO, NM, ON, NY, VT, NH, ME, QC, NF. Found in vegetation of coniferous forest. Abdomen white, grey & black. Legs yellow-white with bands. (pg. 73 Levi, 1957) I'd guess it looks somewhat similar to

Edit - have male, now looking for female.

It appears someone from MT need to find some 'Theridions'.

Genus Ohlertidion - 1 species O. ohlerti moved from Theridion. Widespread across the western US also in BC, AK, AB NT, & QC. ~ 3mm, color variable - no drawing, but collected in lodgepole pine in WY or spruce/white fir in NM. Carapace yellow to brown with brown median band. Legs yellow white with brown band at middle & disal ends. Abdomen spotted with indistinct markings sometimes with lighter or dark scalloped dorsal band.

Araneus juniperi - this one's been driving me nuts for a while. I have the drawings but can't seem to match it up with a specimen. I have a feeling it might look very close to A. bivittatus. I put some notes about the description here

E. ovata - This is such a common species, I'd like a series of images following them from very young to maturity.

I think ...
Robert Lord Zimlich may have found Wamba crispulus:

Araneus juniperi
I've posted a dissecting-microscope photo of a preserved female of this species. Mine was bright green and white in life, quite different from the photo here. I'm not clear about how much variation in color there is for this species. According to Levi (1973) there are clear differences between what he describes "two longitudinal green bands on the abdomen" and what he quotes from Banks' description of individuals in the southern part of the range (with red stripes and spots). Evidently there is geographic variation. Perhaps mine is the "northern" form and Banks describes a form similar to what you have in the photo? I think that in some photo sites there has been confusion with Araneus bivittatus. A. bivittatus has (according to Levi 1973) an abdomen that is longer than wide and a "median anterior hump" which seems missing on your photo here. So I'm thinking that this might be A. juniperi of the "southern form" perhaps?

Good stuff!
I'll leave my comments on the image

Canalidion mantanum = Theridion montanum
Male off the list. See the following thanks to Rod Crawford.

ramp traps
Lynette wrote: "It appears someone from MT need to find some 'Theridions'."

If you are ever there for a couple weeks, you should consider trying traps. Brian Patrick showed me his ramp traps yesterday. These consist of a simple resealable food container with openings cut in below the lid. The ramps are easily made out of thin aluminium roof flashing; they are sprayed with a non-slip coating and the upper folded edge hangs over the edge of the opening cut into the container.

They are easy to make and very efficacious -- better than pitfall traps in his tests.

His list of results from work in the Fort Pierre National Grassland is going to add 50 or more species to the state species list.

The biggest drawback, from a Bugguide perspective, would be the lack of live habitus images; although I suppose with daily checking, one could possibly avoid using a liquid trapping agent and thus gain at least some live specimens.


ramp traps
any pictures?

Don't ask me why, but I didn't take any photos of his set-up. But I'll send the two of you the article that describes it. The only real modification that Brian did was to use the flashing instead of plastic for the ramps, and to use two large spikes through a braid strap with a grommet at each end to hold down the trap (you could also place a rock on top).


Yes, propylene glycol. Or for us commoners, "RV antifreeze" -- NOT the motor vehicle antifreeze (ethylene glycol).

you can get Brian to post some pictures; i'd like to see how they are put together

Check your mailbox. I was
Check your mailbox.

I was so enthralled with his $40,000 microscope that also does fully automated Z-axis imaging, that I forgot about the small things. But I did get a photo of him wearing his electric leaf litter exhauster.

I think I would be drooling over that as well
Thanks for the paper.

"Z-axis image stacking" is what I meant, but you probably knew that.


I just looked through BG pages for different types of bug traps. There are surprisingly few on file, and no ramp traps. This is a part of BG that could use some significant input, IMO (unless I was looking in the wrong places:

What preserving fluid is he using? Propylene glycol, by any chance? I think I'll try some of these. In my field ecology lab last summer we caught a lot of arthropods with these traps, including many spiders. I agree that they work well.

Carabid beetles have been decimating my pitfall traps, but then they are dry traps. The beetles eat or destroy most of the spiders that fall in with them. Time for some fluid traps, I think, or I'll lose a lot more specimens. I might switch to pan traps for live specimens.

Are there many missing genera?
Maybe a listing of missing genera of spiders could be put together here, similar to other wish-list posts (Coleoptera and Heteroptera for example).

That's the idea
However, I only have time to list the ones I really know can be ID'd by field markings/pattern and I only find those as I come across them during research for other reasons. I'm sure there are a TON of missing genera.... many which can't be ID'd from a photo.

Especially Linyphiidae!
Especially Linyphiidae!

possible Wamba?

Hmmm, I don't think so (shape of carapace, posterior marking), but the photos don't offer that much to go on.


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