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Microfossils From Shark Tooth Hill, Ca


PA Fossil Finder

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Not to long ago, forum member Caldigger sent me a box of Shark Tooth Hill bonebed material. I finally finished going through it and photographing them today. I only took pictures of the best ones, and I have a lot of other partials. I managed to take these pictures with an extremely simple setup: I cut a hole in the bottom of a clear plastic cup, stuck the bottom of my microscope's lens through it, and voila :)post-10984-0-33389600-1393117535_thumb.jpg Feel free to correct me in any wrong identifications.

Here are some Squalus to start us off:

post-10984-0-81828100-1393117585_thumb.jpg post-10984-0-23592100-1393117593_thumb.jpg

I think they are S. occidentalis.

Here are some basking shark teeth, Cetorhinus:

post-10984-0-07586800-1393117648_thumb.jpg

Carcharhinus sp.:

post-10984-0-04923400-1393117740_thumb.jpg

Some dermal denticles:

post-10984-0-88697900-1393117794_thumb.jpg

Tiger shark tooth, Galeocerdo aduncus:

post-10984-0-21024800-1393117837_thumb.jpg post-10984-0-62859000-1393117846_thumb.jpg

Continued in next post.

Stephen

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Heterodontus sp.:

post-10984-0-45313500-1393118035_thumb.jpg post-10984-0-04085900-1393118043_thumb.jpg

I think these are mako teeth:

post-10984-0-32610000-1393118053_thumb.jpg post-10984-0-75731500-1393118062_thumb.jpg

Smooth-hound teeth, Mustelus sp.:

post-10984-0-72865200-1393118161_thumb.jpg post-10984-0-38783600-1393118170_thumb.jpg

Continued in next post.

Stephen

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These were identified as houndshark teeth, Triakis sp.:

post-10984-0-47044800-1393118350_thumb.jpg

Angel shark teeth, Squatina lericheii:

post-10984-0-58077200-1393118426_thumb.jpg post-10984-0-40978700-1393118433_thumb.jpg

Eagle ray teeth, Myliobatis sp.:

post-10984-0-43521000-1393118502_thumb.jpg

I have no experience identifying ray teeth, so I just took a picture of all of them!

post-10984-0-79522600-1393118511_thumb.jpg

Stephen

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Great photos and really cool finds! What a broad range of species in that matrix. I love the ray teeth ... I'm kinda partial to them. Lol

I can't see the 2 pics of Carcharhinus teeth. Did they upload correctly?

 
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Great photos and really cool finds! What a broad range of species in that matrix. I love the ray teeth ... I'm kinda partial to them. Lol

I can't see the 2 pics of Carcharhinus teeth. Did they upload correctly?

Fixed it :)

There was actually only supposed to be one picture, and the link wasn't working. It should be fine now.

Stephen

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Good deal :) and I really like the dermal denticles too. They are another item that I can recognize. I am still learning shark teeth...sigh...

 
12-2023TFFsig.png.193bff42034b9285e960cff49786ba4e.png
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Cool stuff! I like the variety, and the number of intact teeth. Looks like a very nice matrix to sort through. :D

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  • 2 months later...

Triakis is the genus for the modern leopard shark, T. semifasciatus and the STH teeth are very similar to those of that species although there has never been a study on that.

It might be better to list the STH angel shark as Squatina sp. as there are no unique characters to separate it from other Neogene species (and at some of the others were based on descriptions that would be considered too brief or generalized to be valid).

.

These were identified as houndshark teeth, Triakis sp.:

attachicon.gifTriakis.JPG

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