?Trochosa terricola

[HnnbL]

Please help me to ID this spider, I think it is Trochosa terricola

 

[jsloan]

Please help me to ID this spider, I think it is Trochosa terricola

Either that or possibly T. spinipalpis. According to Roberts (1996), the T. spinipalpus male has a "group of stout spines on the undersurface" of the palpal tibia (Michael J. Roberts 1996, Spiders of Britain and Northern Europe, Field Guide, Collins pg 226-228). The spines are pointing in a generally forward direction.

I can't see the underside of the palp tibia in the pictures; otherwise, the two species look similar to each other.

 

[HnnbL]

thanks alot jsloan.:worship:

 

[Bastian Drolshagen]

hi,
agree with jsloan.
BTW: Anyone noticed the dark Mt and Ti I of that specimen - I´ve never seen this at T. terricola or T. robusta.

 

[jsloan]

BTW: Anyone noticed the dark Mt and Ti I of that specimen - I´ve never seen this at T. terricola or T. robusta.

Roberts mentions this. It's one way to tell the two apart. T. robusta also has a darkened tarsus on Leg I, whereas in T. terricola the tarsus is not dark (as in this specimen). The darker leg segments are characteristic of males, but not females.

 

[HnnbL]

This specimen is MALE!

 

[jsloan]

Thought I'd add a few pictures to this thread of a spider I just keyed out this evening as T. terricola (male). This one is from Alberta, Canada and shows some color differences from the European version: the cardiac mark is lighter in the Alberta species, as is the longitudinal stripe on the carapace.

I'm starting to catch these now, both males and females, in pitfall traps.

 

[Bastian Drolshagen]

same here, had quite many of those in my traps last month

 

[jsloan]

Please help me to ID this spider, I think it is Trochosa terricola

Hi, Hnnbl,

Would you still have the specimen in your pictures, by any chance, or could you find another one? I mentioned this thread in the Nearctic forum, where we were also talking about T. terricola, and someone asked me about verifying the ID of your spiders. Any chance of your posting pictures of the palps from your specimens?

There are excellent pictures for several European Trochosa species at this site for comparison:

http://www.spiderling.de/arages/Fotogalerie/Fotogalerie.htm

I'd really like to nail down the ID for the spider you've shown above, if possible.