Teeth from the Glen Rose Formation, Canyon Lake TX?

[JamieLynn]

I have been TRYING to find some shark teeth in the Cretaceous Glen Rose Formation around Canyon Lake (not a lot of shark teeth in the Glen Rose Formation!) But I know they are there...just far and few between, as my parents would say. Soooo....finally stumbled across this tiny little thing. It's not your classic cretodus, obviously, but could it be a tooth? With the root broken? What gives me pause is it is grooved along the front curved edge.. There is a distinct furrow.  Perhaps it is an enchodus tooth? I don't know enough about vertebrates to know. 

 

Also, found a little group of what.I think might be pychnodont teeth, but I am just not sure! Any help with ID'ing these would be appreciated!  Thanks so much! 

 

Tooth ?  Measurement in inches

 

All Four Sides:   Top with furrow

 

Side - you can see  the furrow on the left side 

 

 

Underside (Back side)

 

 

Pycnodont teeth?  Measurement in Inches

 

 

From the side 

 

 

[Al Dente]

The first looks like the tip of a crab or shrimp claw.

[JamieLynn]

29 minutes ago, Al Dente said:

The first looks like the tip of a crab or shrimp claw.

Interesting....these are the typical crab claws I find in this site: 

 

 

 

 

 

[JohnJ]

Eric is right; the first is another type of crab claw.  

[JamieLynn]

38 minutes ago, JohnJ said:

Eric is right; the first is another type of crab claw.  

 

interesting...well, that's cool too. Do you know what species?

[JohnJ]

1 minute ago, JamieLynn said:

 

interesting...well, that's cool too. Do you know what species?

 

Sorry, I do not.  

[JamieLynn]

- @Uncle Siphuncle in the Fossil Reports mentions a species of crab Callianesa in the Glen Rose,. Could that be it?

[erose]

2 hours ago, JamieLynn said:

- @Uncle Siphuncle in the Fossil Reports mentions a species of crab Callianesa in the Glen Rose,. Could that be it?

Nope, don't think it is a Callianassa.  They look more like the typical Pagurus but are small and smooth.  I have another claw from that local that I have yet to ID as well. Yours may be a small loose pincer from one of like this. (sorry for the poor image)

 

PS I have collected a handful of old and new references for Crustaceans from our area but this isn't described in any of them from what I can tell.

 

PSS the bean-shaped teeth are definitely from a pycnodont. I have a small handful from the Glen Rose Formation as well. There are a handful of possible species among several genera (Macromesodon, Nonaphalagodus, Palaeobalistum) that it could be. Are they just a jumbled group or do they appear to be set in a jaw?  That could help narrow it down. 

[JamieLynn]

ahhh..yes that does look simiar to mine.  That's a beauty. But no ID on it? That's too bad. Pagurus eroseiiiiii

 

 the pycnodont were found just like that, all clumped together in the matrix. The bottom is just more matrix, so it doesn't really look like any bit of jaw. 

Thanks for the ID confirmation! 

[erose]

38 minutes ago, JamieLynn said:

ahhh..yes that does look simiar to mine.  That's a beauty. But no ID on it? That's too bad. Pagurus eroseiiiiii

 

 the pycnodont were found just like that, all clumped together in the matrix. The bottom is just more matrix, so it doesn't really look like any bit of jaw. 

Thanks for the ID confirmation! 

Well it isn't a Pagurus....but who knows. One problem is that there are crabs known from carapaces and crabs known from claws but not enough complete material to sort em all out.

 

FYI, I have pycnodontid teeth & jaws, bony fish teeth AND shark teeth from the "micro zone". Plus turtle bones.  Here's a cool jaw plate I found in two halves TWO years apart. They still fit together perfectly....