Need a spider ID!!!

[Luke]

This little guy was found in southern california, above a stream in what looked like a typical orbweaver web...
(It also has a large black spot underneath its abdomen and has ~1.5" diagonal leg length)

Thank you!!!

 

[davisfam]

Orb Weaver - Neoscona crucifera (?)

Information: http://bugguide.net/node/view/448889/bgimage

Good Luck!! Neat looking spider!