Spider ID help

[jdcarrel]

Spider ID help (more pictures)

A friend says he has a bunch of them at his house. He lives in Utah. I am trying to get him to take a better picture of the carapace, but this is all I have now. Any ideas?

 

[cacoseraph]

do you have a pic of the webs they make?



if you want to help get a much more solid id, you can try to take a picture of the spider's eyes. it might be a bit hard on a sorta small spider like that, but if you have a good cam or want to try to take a 20-30 shots in macro mode of a Point and Shoot cam you can probably do it. with an eye shot we can pretty much for sure it what family the spider belongs to.


i have a couple guesses to family, but i am not "feeling it" from this spider so i don't want to embarrass myself =P

oh, i am being silly... my first two guesses are Amaurobiidae ( http://bugguide.net/node/view/7018/bgpage ) or Agelenidae ( http://bugguide.net/node/view/1974/bgpage )

 

[jdcarrel]

do you have a pic of the webs they make?



if you want to help get a much more solid id, you can try to take a picture of the spider's eyes. it might be a bit hard on a sorta small spider like that, but if you have a good cam or want to try to take a 20-30 shots in macro mode of a Point and Shoot cam you can probably do it. with an eye shot we can pretty much for sure it what family the spider belongs to.


i have a couple guesses to family, but i am not "feeling it" from this spider so i don't want to embarrass myself =P

oh, i am being silly... my first two guesses are Amaurobiidae ( http://bugguide.net/node/view/7018/bgpage ) or Agelenidae ( http://bugguide.net/node/view/1974/bgpage )

Amaurobiidae was my first guess as well. I will see if I can get some better pictures from him.

 

[ErikWestblom]

Looks like Tegenaria (Agelenidae).. possibly T. domestica.

 

[cacoseraph]

Looks like Tegenaria (Agelenidae).. possibly T. domestica.

that was kinda my thought (Teg, at least, i can't do teg species that well)... but i based mine on the abdomen coloring and roughly shape

but the face reminds me a bit of some kinda Am species



if we can find out about the web it would help some, i think. Am's are definitely cribellate... and i don't think any Agel's are... right?



edit.. i am leaning more towards Agel(Teg) now, too

 

[jdcarrel]

Here is another picture. He still hasn't said anything about the webbing.

 

[Widowman10]

i initially thought tegenaria. could be wrong though, that was just an quick guess.

 

[ErikWestblom]

if we can find out about the web it would help some, i think. Am's are definitely cribellate... and i don't think any Agel's are... right?

Agelenidae make sheet/funnel webs.

 

[jsloan]

Nice specimen!

I'm 100% sure this is Tegenaria sp. (Agelenidae). I've had a live T. domestica sitting on my desk in a container, in which it has built a web, for several months now.

Both T. domestica (barn funnel weaving spider) and T. agrestis (hobo spider) are found in Utah. This spider might be either one. Forget about IDing it to species from pictures, though. The two species are about the same size and look too much alike as far as general appearance.

Here's a paper explaining what you need to look at to tell them apart:

http://pep.wsu.edu/pdf/PLS116_1.pdf

 

[cacoseraph]

Agelenidae make sheet/funnel webs.

so do Am's, kinda. sheetwebs, at any rate. and Agel only make funnels when they have the right setup for it. otherwise they just make sheets

just one is crib and one isn't



as for what these terms mean, here is a good example of what virtually identical web structures would look like crib or not

http://i21.photobucket.com/albums/b287/cacoseraph/hunt/Filistatidae_vs_Agelenidae_b.jpg
http://i21.photobucket.com/albums/b287/cacoseraph/hunt/Filistatidae_vs_Agelenidae_c.jpg
the top web is from a Filistatidae spider, which is cribellate. crib web is fuzzy and adheres by mechanical means only. the bottom web is made by an Agelenidae, which is not crib. they make "normal" webbing.

 

[sean31laf]

Is this the same kind if spider? My roommate called me to come check this out and look it up since hes afraid of spiders. It kinda looks like the one in this post at the top but darker. Same kind?

 

[MaartenSFS]

No, I think it's safe to say (or is it? ) that that is a genus Dolomedes fishing spider.

 

[jsloan]

No, I think it's safe to say (or is it? ) that that is a genus Dolomedes fishing spider.

I agree, Dolomedes sp. (Pisauridae). It's a completely different spider from the other one.