Giant beaver upper incisor chunk? Peace River Florida ID help, please and thanks!

[Amarykah]

Hey everyone! I found an exciting array of unusual things in the river today. At first I thought I had a baby sloth tooth, but after some research I believe it’s a giant beaver incisor! @Meganeura you posted something that HAS to be the same as what I found. But can anyone explain why mine has a hole down the center? The shape looks like a sloth tooth to me but the enamel says it’s not sloth, right? Looking for ID confirmation as well as explanation for this hole  thank you! …And disregard the sand and dirt still in my nails haha it was a fun day! (Let me know if measurements or better/more pics are needed)

 

[Meganeura]

Yep, that’s a capybara incisor tooth! The hole, I believe, is due to new teeth slowly filling in the dentine inside teeth (Starting off hollow when unerupted) - so this would be a more juvenile capybara. Note: this is just my understanding of mammal teeth in general - I’m not entirely sure if that applies to teeth like this. @Harry Pristis @Shellseeker might have more input to give. 

[Amarykah]

@Shellseeker @Harry Pristis

[Amarykah]

1 minute ago, Meganeura said:

Yep, that’s a capybara incisor tooth! The hole, I believe, is due to new teeth slowly filling in the dentine inside teeth (Starting off hollow when unerupted) - so this would be a more juvenile capybara. Note: this is just my understanding of mammal teeth in general - I’m not entirely sure if that applies to teeth like this. @Harry Pristis @Shellseeker might have more input to give. 

I was adding them as you replied to me  thanks! It’s the first capybara tooth I’ve found! And now I’m hoping it’s juvenile! That makes it twice as special for some reason  

[Harry Pristis]

Ontogeny is probably not involved here.  These incisors are hypselodont -- ever-growing -- so the pulp cavity doesn't extend into the erupted portion of the tooth.  If this is a section of capybara incisor, it is unlikely that it was ever part of the erupted portion.

 

[Amarykah]

12 hours ago, Harry Pristis said:

Ontogeny is probably not involved here.  These incisors are hypselodont -- ever-growing -- so the pulp cavity doesn't extend into the erupted portion of the tooth.  If this is a section of capybara incisor, it is unlikely that it was ever part of the erupted portion.

 

So can I deduce that I likely have an unerupted chunk of Holme’s capybara incisor and NOT likely a juvenile? Mine measures 10.4mm on the side that I believe is the front. 

[Harry Pristis]

That's my inference, Amarykah.  The front, the anterior, of a rodent incisor is the crown and will have the only enamel on the tooth.