CLOSED: Spider found in my house

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tom_warren Jun 03, 2009

Can someone please help me ID this spider? I think it could be a Wolf but really would like a second opinion. I live in Warren, PA.

Thanks,

Tom

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suunto Sinks Grove, WV Jun 03, 2009

It certainly could be a wolf spider (family Lycosidae), but I cannot see the eyes clearly enough to be certain. Wolf spiders have their anterior median eyes much larger than the eyes in the ror immediately bellow them - see http://www.cirrusimage.com/spider_wolf.htm for images. The eyes of spiders in the closely related family Pisauridae are all fairly similar in size - see http://www.spiderzrule.com/spider408/100_1024l.JPG for an image.

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tom_warren Jun 04, 2009

I've added the best picture we could get of the eyes and back. Does the back indicate a violin shape of the Brown Recluse?

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tom_warren Jun 04, 2009

Here is a picture of the rows of eyes. Any help will be greatly appreciated. Thanks, Tom

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drrex Irvine, CA Jun 05, 2009

While there does seem to be a violin shaped marking on this spider, it most definitely is not a brown recluse. Even without the close-up pictures it is fairly obvious (the banding on the legs being a clear indication), but with the close up of the eyes, this spider does seem to better fall under the family Pisauridae rather than Lycosidae. It looks like it could be in the genus Dolomedes, fishing spiders. Suunto is the expert here though, he can probably give you an exact ID.

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suunto Sinks Grove, WV Jun 05, 2009

The eyes do appear to be more like those of Pisauridae than Lycosidae; if it is a Dolomedes, it most likely would be Dolomedes tenebrosus - see http://tinyurl.com/aaylq
BTW, recluse spiders only have six eyes, arranged in three groups of two each - see http://tinyurl.com/r7kvof

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tom_warren Jun 05, 2009

Thanks suunto and drrex for your prompt responses.

Tom

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