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Strange Aquia Tooth


AmazoniteJosh

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This is what appears to be a shark tooth that my father found hunting at the Aquia formation. Could it be deformed, or a wierd tooth position? What do you think?

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Edited by AmazoniteJosh
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denticle??

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That tooth looks just like a Hemipristis parasymphyseal. Are there not some Miocene/Pliocene areas near or above the Aquia?

Bulldozers and dirt Bulldozers and dirt
behind the trailer, my desert
Them red clay piles are heaven on earth
I get my rocks off, bulldozers and dirt

Patterson Hood; Drive-By Truckers

 

image.png.0c956e87cee523facebb6947cb34e842.png May 2016  MOTM.png.61350469b02f439fd4d5d77c2c69da85.png.a47e14d65deb3f8b242019b3a81d8160.png.b42a25e3438348310ba19ce6852f50c1.png May 2012 IPFOTM5.png.fb4f2a268e315c58c5980ed865b39e1f.png.1721b8912c45105152ac70b0ae8303c3.png.2b6263683ee32421d97e7fa481bd418a.pngAug 2013, May 2016, Apr 2020 VFOTM.png.f1b09c78bf88298b009b0da14ef44cf0.png.af5065d0585e85f4accd8b291bf0cc2e.png.72a83362710033c9bdc8510be7454b66.png.9171036128e7f95de57b6a0f03c491da.png Oct 2022

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George Washington Birthplace and Westmoreland St Park are probably the closest sites near there. This was from around the Wades Bay area. I think a Striatolamia macrota would be my best bet.

Edited by AmazoniteJosh
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It looks like it might be the scarce Eocene tooth Xiphodolamia ensis. There are several pictures of these teeth on Elasmo.com under the Nanjemoy Formation fauna.

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I don't think the tooth is Xiphodolamia ensis. I also do not think it is any sand tiger species, the way the tooth is so compressed. I still say it looks very very much like a Hemipristis parasymphyseal. Here is a pic of one of mine.

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I know Hemi's are not found in Paleocene sediments, but in my opinion, that is what the tooth appears to me.

Bulldozers and dirt Bulldozers and dirt
behind the trailer, my desert
Them red clay piles are heaven on earth
I get my rocks off, bulldozers and dirt

Patterson Hood; Drive-By Truckers

 

image.png.0c956e87cee523facebb6947cb34e842.png May 2016  MOTM.png.61350469b02f439fd4d5d77c2c69da85.png.a47e14d65deb3f8b242019b3a81d8160.png.b42a25e3438348310ba19ce6852f50c1.png May 2012 IPFOTM5.png.fb4f2a268e315c58c5980ed865b39e1f.png.1721b8912c45105152ac70b0ae8303c3.png.2b6263683ee32421d97e7fa481bd418a.pngAug 2013, May 2016, Apr 2020 VFOTM.png.f1b09c78bf88298b009b0da14ef44cf0.png.af5065d0585e85f4accd8b291bf0cc2e.png.72a83362710033c9bdc8510be7454b66.png.9171036128e7f95de57b6a0f03c491da.png Oct 2022

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Here are some pics of the front side of the tooth. It turns out I do also have a Hemipristis parasymphyseal I also have a pic of that. The small tooth seems to only have 2 roots compressed together, my other tooth seems to have 3. But the small tooth seems to have a small bump on one side that could be a worn serration, the big Hemipristis parasymphyseal has serrations around that same spot too. This is getting interesting O_o

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Edited by AmazoniteJosh
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I've been looking in the Nanjemoy fauna at Elasmo, and I think the tooth may be a Scyliorhinus cf entomodon. In it's descriptions it says it can be found screening in aquia sediments. What do you all think?

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Scyliorhinus teeth (Cat Sharks) are very very small. Most around 1mm, some less. A few are in the range of 3 to 4 mm. hat is the size of this tooth? But I will say the tooth is very very similar.

Bulldozers and dirt Bulldozers and dirt
behind the trailer, my desert
Them red clay piles are heaven on earth
I get my rocks off, bulldozers and dirt

Patterson Hood; Drive-By Truckers

 

image.png.0c956e87cee523facebb6947cb34e842.png May 2016  MOTM.png.61350469b02f439fd4d5d77c2c69da85.png.a47e14d65deb3f8b242019b3a81d8160.png.b42a25e3438348310ba19ce6852f50c1.png May 2012 IPFOTM5.png.fb4f2a268e315c58c5980ed865b39e1f.png.1721b8912c45105152ac70b0ae8303c3.png.2b6263683ee32421d97e7fa481bd418a.pngAug 2013, May 2016, Apr 2020 VFOTM.png.f1b09c78bf88298b009b0da14ef44cf0.png.af5065d0585e85f4accd8b291bf0cc2e.png.72a83362710033c9bdc8510be7454b66.png.9171036128e7f95de57b6a0f03c491da.png Oct 2022

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I agree with Paleoc. I have numerous of these teeth and have compared them to modern (extant) jaws of sandtigers and they match. This tooth position was also commonly found in the Eocene deposits in VA. Below is a link to a PDF file which illustrates a comparison of fossil sandtiger teeth to modern sandtiger shark teeth. Look at page 2 and you will see samples of the same tooth/position as your specimen.

Daryl.

Cunningham2000.pdf

Edited by cowsharks
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Daryl, thanks for adding the PDF. I was not aware of this position in Striatolamia. One of the reasons I love this hobby, there is always something new to learn.

Bulldozers and dirt Bulldozers and dirt
behind the trailer, my desert
Them red clay piles are heaven on earth
I get my rocks off, bulldozers and dirt

Patterson Hood; Drive-By Truckers

 

image.png.0c956e87cee523facebb6947cb34e842.png May 2016  MOTM.png.61350469b02f439fd4d5d77c2c69da85.png.a47e14d65deb3f8b242019b3a81d8160.png.b42a25e3438348310ba19ce6852f50c1.png May 2012 IPFOTM5.png.fb4f2a268e315c58c5980ed865b39e1f.png.1721b8912c45105152ac70b0ae8303c3.png.2b6263683ee32421d97e7fa481bd418a.pngAug 2013, May 2016, Apr 2020 VFOTM.png.f1b09c78bf88298b009b0da14ef44cf0.png.af5065d0585e85f4accd8b291bf0cc2e.png.72a83362710033c9bdc8510be7454b66.png.9171036128e7f95de57b6a0f03c491da.png Oct 2022

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