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Wolf Spider - Tigrosa helluo

Wolf Spider - Tigrosa helluo
Buckingham, Bucks County, Pennsylvania, USA
August 30, 2013
Size: 9.0 mm. head-abdomen
Found in the lawn next to a marsh. The ventral shot appears to fit with Tigrosa helluo, though the legs are a bit stripey, and the size is too small--maybe an immature? I also submitted a similar looking spider from the same locale last year, without a ventral shot, and it was ID'd as T. georgicola.

I'd love to get to the bottom of this!

Images of this individual: tag all
Wolf Spider - Tigrosa helluo Wolf Spider - Tigrosa helluo Wolf Spider - Tigrosa helluo

Moved from Spiders.

We're still learning how to separate these, I've been going through them and trying to figure them out. When I started volunteering here we only had an idea of what T. helluo and T. aspersa looked like. Ones without leg bands we filed as T. helluo, ones with leg bands we filed as T. aspersa. Then we learned what T. georgicola looked like and moved ones with a full carapace stripe and banded legs which were mostly misfiled under T. aspersa to T. georgicola. Now we know T. aspersa has a short median carapace stripe and banded legs. Your other image is probably one of the first ones I moved when I started going through them, I now realize that T. helluo can have subtly banded legs and that when the banding is subtle it's not enough to go on. There are other things about your other image that suggest T. georgicola ... I've noticed that the color between the carapace and abdomen is sometimes different in lighter colored individuals with the abdomen having a slight pumpkin color to it.

I thought I detected a bit of an orange tint in the abdomen of your other spider. Another trend I don't think I'd realized when I moved yours out of T. aspersa are differences in the appearance of the heart mark ... the heart mark looks more like T. helluo to me on that one ... so maybe you're right, it could be a T. helluo after all and given the location I think that is more likely. Color isn't a reliable thing to go on although overall T. helluo and T. georgicola seem to have a slightly different palette to them. Ventrals would definitely help with a lot of these! They could potentially cross-breed too.... I have no idea how to tell if that were the case. Now that I know how unreliable the leg banding is I'm going to have to go through them again and pull some of the misfiles out, I know there are some in there. I also have T. annexa and T. grandis to look out for, thankfully there's a paper on them now that we didn't have before, "Tigrosa, (Hogna) Brady 2012". That's helping us better understand their differences. They can be tricky.

Edit: Oh yeah, I agree this new one looks like T. helluo.

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