Help with ID, all found in Myrtle Beach, SC

[csrlewis93]

So I found a few things at Myrtle Beach and I'm looking for some help in ID'ing them. I love looking for fossils but am not sure on things and I love the help I've gotten on this site so far. And any help with these is appreciated.
The ruler is in inches.

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 1: I thought this looked similar to a whale ear bone? Admittedly it could just be a rock but I wanted to post here and get some opinions. Getting photos of something black and shiny can be difficult but I could take more if needed, and maybe find better lighting.

 

 

 2. At first I though alligator tooth but then I learned that mosasaur teeth have been found in this area also, so now I'm not so sure. Either way I love it.

 

 

 

3. I was thinking dolphin tooth but obviously it's broken so I'm not entirely sure.

 

 

4. And I thought I'd throw this one here too. When I saw it in the water I thought I was going to be picking up a cucullaea steinkern, but this is what it was. I thought I remembered seeing something like this online somewhere but I really have no idea, unless it's just a piece of some bone.

 

So there they are. Any information about any of these would be much appreciated. And I could post more photos of any of these.

[ted coulianos]

#1  has all the hallmarks of a (badly worn) cetacean tympanic bulla

#2  croc tooth - very nicely preserved

#3  badly worn whale/porpoise tooth

#4  "tilly bone" or hyperostotic fish spine

Hope this helps; maybe someone can chime in an give you a genus/species i.d. on the croc tooth.

[csrlewis93]

@ted coulianos Thanks for the info! Yes a "tilly bone", I knew I saw that somewhere. And yeah that #1 does seem badly worn that's why I couldn't be positive.

[PaleoNoel]

I believe the tooth is more likely to be mosasaur , rather than croc based on the position of the carinae. 

@Praefectus @pachy-pleuro-whatnot-odon

Here's a thread with a similar discussion and some helpful comparison pics.

 

[csrlewis93]

7 hours ago, PaleoNoel said:

I believe the tooth is more likely to be mosasaur , rather than croc based on the position of the carinae. 

@Praefectus @pachy-pleuro-whatnot-odon

Here's a thread with a similar discussion and some helpful comparison pics.

Okay now I see the comparison with mosasaur, thanks for pointing out this thread!

 

[csrlewis93]

Okay now I see the comparison with mosasaur, thanks for pointing out this thread!

[Carl]

I too, think that 1st tooth is most likely mosasaur.

[Praefectus]

On 4/9/2024 at 9:03 PM, csrlewis93 said:

 2. At first I though alligator tooth but then I learned that mosasaur teeth have been found in this area also, so now I'm not so sure. Either way I love it.

 

That's a nice mosasaur tooth. The other picture looks to be a mosasaur tooth root.

[csrlewis93]

6 hours ago, Praefectus said:

That's a nice mosasaur tooth. The other picture looks to be a mosasaur tooth root.

 

 

I never even thought of that! Now that I look closer I can easily imagine the black piece sticking out could be the inside of a broken-off mosasaur tooth crown.