My wife and I were down at Turkey Run State Park in Indiana this past weekend. While on a trail we came across a very unusual spider. My wife is a naturalist and I too am not necessarily ignorant of the natural world. Still, we cannot ID this spider. Closest picture I've found that resembled it was the Arrow Shaped Micrathena spider... however, the one we saw was more black and white with rather large spines on it's abdomen. Any ideas?

Can you post a picture? Sure would help.

Look anything like this?

47731

It's a Spined Micrathena spider

YES, that's the one. Thank you.