Help Identifying black spider with white-yellow spot on abdomen?

Question

Recently I saw a round black spider about the size of a dime. It was black all over except for one small white-yellow triangle or spot on it's abdomen. It's abdomen was very round and I know it isn't a Black and Yellow garden spider. I also saw one outside on my porch that same day. It looks like it could have the body of a jumping spider but I can't find any that looks like it online. Any ideas?

Answer 1

so many spider questions these days -

check out these and help yourself -

http://www.spideridentification.org/

http://www.badspiderbites.com/spider-ide...

Answer 2

Does this look like it?

http://bugguide.net/node/view/174064/bgi...

Additional details - 8mm was the size of that specimine.  I do believe that the jumping spiders of the Phidippus genus get upwards of 16 milimeters, or roughly 5/8th of an inch.