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Mtskinner

Here's A Few Cretaceous Fossils That Have Me Stumped

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Troodon

The last one is on the small side and as with most of the bone we find its a little beat up.

I believe this is a dorsal process of vertebra from a Champsosaurus. They are typically found disarticulated and in a preservation like yours.

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Al Dente

The object in post #73 is a fish rostrum similar but different from Cylindracanthus. A picture of the broken cross section might help in the ID. The small circles in the grooves are tooth sockets.

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Mtskinner

The object in post #73 is a fish rostrum similar but different from Cylindracanthus. A picture of the broken cross section might help in the ID. The small circles in the grooves are tooth sockets.

It has a round cross section...I'll get a pic of it

Edited by Mtskinner

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Mtskinner

Here's one more stumper I have. It's just over the 2 inch mark and its triangular in cross section. It doesn't appear to be a tooth but if it is it's the only one I have like it.

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Mtskinner

Here's a few pics showing the weird ridges on the...specimen???

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non-remanié

post 79 is a hybodont dorsal fin spine, great stuff!

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Mtskinner

Is this a Plesiosaur tooth??? The tooth is 2-1/4" long and 3/4" wide at the base and is round in shape. It was found in the same creek as the rest of the items I've posted...Any thoughts/comments would be appreciated!

Thanks,

Terence

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Auspex

Holy cow, that's huge!

Plesiosaur is my first impression, but I would yield to anyone with more than my paltry experience.

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non-remanié

plesiosaur indeed, another great find!

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Troodon

A really nice plesiosaur tooth. Great locality for a variety of species.

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JustPlainPetrified

Nice, nice, nice!

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Mtskinner

Thanks! It's the largest one I've seen from our area...just wish the tip was all there!

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Mtskinner

Here's another weird item that I can't figure out. Not exactly sure it's even a tooth but looks as though it does have enamel. It's almost completely flat and is 5/8" long, 9/16" wide.

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Edited by Mtskinner

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Fossildude19

Looks like a scute or dermal denticle to me.

Maybe someone else will weigh in with some idea.

Regards,

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Al Dente

Here's another weird item that I can't figure out. Not exactly sure it's even a tooth but looks as though it does have enamel. It's almost completely flat and is 5/8" long, 9/19" wide.

It looks a lot like a Tertiary sawfish rostral tooth. Are there any deposits at the site that aren't Cretaceous?

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Troodon

It looks a lot like a Tertiary sawfish rostral tooth. Are there any deposits at the site that aren't Cretaceous?

Boy, I had the same impression a sawfish rostral tooth. Let's hear back Mtskinner.

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Mtskinner

It looks a lot like a Tertiary sawfish rostral tooth. Are there any deposits at the site that aren't Cretaceous?

I guess it's possible...this is a picture of some of the sawfish rostral teeth we find. Are you thinking this could possibly be a split root section of a tooth, a large tooth, or a different type of all together?

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Edited by Mtskinner

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Troodon

Those teeth are from a sawshark Ischyrhiza but the ones being referenced are different and Tertiary.

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Mtskinner

This particular tooth was found along side the others...well in the same creek. The creek is located smack in the middle of the Selma group...late cretaceous. It's also the only one I've seen as well.

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Mtskinner

Here's another one that has me stumped. It doesnt seem to fit in with the other crock or mosasaur teeth we've found in this area. The tooth is just over 2" long and 3/4" wide. It's round in shape with a faceted enamel that has no carinae on either side. Any comments will be greatly appreciated!

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Troodon

I don't think crock teeth are faceted so I would rule them out. Mosasaurs teeth can be so I would lean in that direction. Let's see what others say. Boy you sure have a host of different species in your collecting areas. Nice find.

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Mtskinner

I've got a few more that I can't quite figure out. I believe this 1st one is a piece of a turtle shell...its 2" long and 3/4" wide.

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Mtskinner

Heres the 2nd one...I know I've seen one of these before but I just can't place it.

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Opisthotriton

First one could certainly be the end of a Trionychid (soft shelled turtle) rib in excellent unabraded condition. Second one could be a heavily abraded Hybodont shark cephalic spine.

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