I have a mini anthurium which hasn't produced seed. But I found two articles, one with a photo of anthurium seed and suggested propagation techniques. If this doesn't help, I'm certain someone here will have your answer. Good luck.
NanaNut2
http://www.aroid.org/TAP/Articles/anthpollination.html
http://www.alsgh.com/blog/2007_09_01_archive.html