ID and age of sharks teeth found on Naples Beach FL

[Aisha]

My friend found a few sharks teeth on Naples Beach FL.  She was hoping to find out the age and ID if possible.  Thank you! 

[ynot]

Your pictures are to dark to tell what type tooth.

Please retake them in direct sunlight.

[Macrophyseter]

I think what's given is good enough, except for the 4th tooth which looks too generic at that lighting.

 

1. Carcharodon plicatilis

2. Hemipristis serra

3. Carcharocles megalodon

4. Alopias superciliosus?

 

As far as I know, the Tamiami Formation stretches to Naples Beach. The Tamiami Formation is dated Late Miocene-Pliocene.

[ynot]

2 minutes ago, Macrophyseter said:

I think what's given is good enough, except for the 4th tooth which is merely a simple guess.

 

1. Carcharodon plicatilis

2. Hemipristis serra

3. Carcharocles megalodon

4. Alopias superciliosus?

I would like to know what diagnostic features You used to come up with these IDs?

[Aisha]

7 minutes ago, Macrophyseter said:

I think what's given is good enough, except for the 4th tooth which is merely a simple guess.

 

1. Carcharodon plicatilis

2. Hemipristis serra

3. Carcharocles megalodon

4. Alopias superciliosus?

 

As far as I know, the Tamiami Formation stretches to Naples Beach. The Tamiami Formation is dated Late Miocene-Pliocene.

Thank you so much! This helps a lot!  I do have a question, why do you think the 3rd tooth is a megalodon?  My friend sent me a picture with all of the teeth next to a penny.  I know I am not suppose to post the picture next to a coin but that is all I have for pictures.  Maybe this picture could help out!  Again thank you so much, you are awesome! 

[Macrophyseter]

24 minutes ago, ynot said:

I would like to know what diagnostic features You used to come up with these IDs?

1. Distinct 'Carcharodont' triangle shape and it does appear that the crown is unserrated and razor-like as it does not appear to be worn enough for serrations to disappear

2. Distinct robust build with the crown pointing away from the middle axis and signs of very large serrations on the concave side of the blade.

3. Presence of bourlette and robust root with extreme low crown.

4. Smoothly curved root with broad crown, however like I stated I am not sure with my ID on this.

[Macrophyseter]

@Aisha Unfortunately, the new pictures don't do justice, only the bottom two teeth show somewhat better lighting. Hopefully you can get another chance to see those teeth!

 

15 minutes ago, Aisha said:

 I know I am not suppose to post the picture next to a coin

Is there a rule about not posting pictures with coins? I mean, it's more encouraged to use a ruler rather than a coin for scale, but there is no reason to make it against the rules.

 

15 minutes ago, Aisha said:

I do have a question, why do you think the 3rd tooth is a megalodon?

The diagnostics are that there is a bourlette (That liney thing between the enamel and the root in only Otodus and Carcharocles teeth), and shape matches with extreme posterior megalodon teeth like these:

 

It is true that megalodon teeth are usually giant, but at times teeth that are ungodly tiny can be found. Here's a forum thread showing some examples:

 

[PaleoRon]

1 - C. hastalis

2 - H. serra

3 - Carcharhinus sp upper

4 - Carcharhinus sp lower

[Aisha]

1 hour ago, PaleoRon said:

1 - C. hastalis

2 - H. serra

3 - Carcharhinus sp upper

4 - Carcharhinus sp lower

Thank you!! ☺️