Tiger Shark Teeth ID

[Praefectus]

Hello. I purchased some tiger shark teeth and was hoping to get some ID help. The teeth come from various locations in Florida. The largest tooth is 1.25 inches (~3.2 cm). All the teeth have complex serrations. I believe the first row (#1-6) come from Galeocerdo mayumbensis. I am unsure about the second row and think they may be either Galeocerdo cuvier or Galeocerdo mayumbensis. Below are front and back pictures of the teeth. Thanks for any help. 

[hemipristis]

Nice teeth!  I believe the upper row to all be G. mayumbensis except for the far left (#1), and the lower row to all be G. cuvier, based upon one or more these traits:

 

1. The U-shaped rather than V-shaped base of the root.
2. The laterally compressed nature of the G. mayumbensis teeth reflective of the v-shaped root which also makes them more erect.
3. Coarser serrations

As for tooth number 1, I'm not positive. If forced, I'd say G. cuvier, or maybe transitional?? I have several of these type of teeth that display characteristics of both, and I have tentatively identified them as G. mayumbensis/cuvier.

 

Side note: I lost out on online on an auction for a grouping of teeth like these in the last two weeks. I'm wondering if these are them, LOL

[SailingAlongToo]

This may help for comparison. I use it quite frequently and borrowed it originally from fossilguy.com.

 

[Praefectus]

Thanks for the ID help @hemipristis. I originally grouped #1 with the mayumbensis teeth thinking that it might be a back tooth. I see that it does have characteristics of both. 

 

We probably were looking at the same listing. Two weeks is the right time-frame. I snatched these up as soon as I saw the mayumbensis teeth in it. I used to think they were a rare and expensive species, but I've recently seen a lot them are just mislabeled as G. cuvier. 

[Praefectus]

Thanks @SailingAlongToo. It's a great comparison. I've stared at that exact chart quite a bit as I try to figure out which teeth I have.