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This was my second time visiting this well-known Late Carboniferous, Kasimovian stage (305-7mya) spot on the NW edge of the Illinois basin. Here are some things I found.

Some  large brachiopods.

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After splitting some rocks, came across this nice tooth.

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I kept both halves for careful extraction/reassembly at home, which took at least a few hours. I don't know much about shark teeth and after researching, and from what I can glean from what scarce information is available, I think it's a Holocephalia subclass, Chimaera tooth. Possibly Cochliodus sp...? It measures 2cm. Correct me if I'm wrong, as I don't know much about teeth.  Another cool thing I noticed is that it fluoresces a eerie green under ultraviolet light, however my cell phone camera interprets the UV light differently than my eye. I probably have to mess around with exposure settings or something. Whatever the case, it helps bring out details.

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Also,, found this genal spine of Ameura sp. with a tooth fragment(dark spot, lower right). I was crossing my fingers that at least  the entire cephalon would be there ,but no dice... however, it also fluoresces glow-in-the-dark green which makes it stand out from the matrix easier to photograph. Ahh, to find a complete Ameura that fluoresces..

Thanks for reading.

 

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Love the predation marking on the brach on the right.  Here is an interesting article (abstract) on Composita brach predation and Cochliodus sp. Sharks:

 

https://onlinelibrary.wiley.com/doi/10.1111/j.1502-3931.1987.tb02052.x

 

If someone can access the entire article, I'd love to read it.

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Great finds! Love the tooth. Probably Cochliodus or Deltodus. I still have trouble with holocephalian teeth. Maybe @Archie can take a look.

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Super finds! 

I love those brachiopods.:)

Thanks for sharing. 

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38 minutes ago, grandpa said:

Love the predation marking on the brach on the right.  Here is an interesting article (abstract) on Composita brach predation and Cochliodus sp. Sharks:

https://onlinelibrary.wiley.com/doi/10.1111/j.1502-3931.1987.tb02052.x  If someone can access the entire article, I'd love to read it.

 

 

mail-happy-smiley.gif?1292867634  check-email-smiley.gif?1292867567

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Awesome finds! The tooth is definitely a Cochliodont, it looks to be most likely a Deltodus sp. as @connorp suggested.

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1 hour ago, Archie said:

Awesome finds! The tooth is definitely a Cochliodont, it looks to be most likely a Deltodus sp. as @connorp suggested.

Great, thanks for your help!

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Some very nice finds from one of my favorite sites! You got a quality sampling of the variety it can offer. The tooth is a nice size too. I found a very similar one this spring when I was collecting there- not as complete as yours, though. 

 

 

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4 hours ago, deutscheben said:

Some very nice finds from one of my favorite sites! You got a quality sampling of the variety it can offer. The tooth is a nice size too. I found a very similar one this spring when I was collecting there- not as complete as yours, though. 

 

 

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@deutscheben  Wow, that is amazingly similar. It is an interesting site I hope to return perhaps in the spring.

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