Galeocerdo species are tough to ID sometimes. I always look at them from the edge - Contortus teeth have a twist and aduncas have a relatively straight edge. The two bottom teeth in you photo are pathologic and look like the could be sympheseal teeth. The position normally has just a straight cone. Do you have any from the sympheseal position without the pathology?

I have seen the split tip on several galeocerdo contortus before, but I wouldn't call it common by any means. over my life, I've found tens of thousands of tiger shark teeth and I've never found one. but I was there when t$ found one, and Jedi Master has several of them. None of the split tip teeth have ever been the sympheseal position, though. That's a very cool tooth! Looks almost like that most coveted position of cow sharks, doesn't it?

Thanks for your comments on the metal detecting. I really enjoyed that day. It made me wish that I had a similar detector for fossils (yet again!)