teeth, snails, etc

[austinswamp]

Good afternoon, I found these fossils in the Dessau Formation near Austin, Texas and have a good idea on most of them except the shark tooth. I am torn between Megalodon and Mackerel. Any ID on the others appreciated as well. Thank you  

[Fossildude19]

I took the liberty of brightening your picture a bit.  

Regards, 

 

 

 

EDIT:  Your shark tooth is not a Megalodon - I can guarantee that. 

Also, the mammal bits are probably not from the formation that the Hamulus worm tubes, echinoid, shark tooth and snail probably are. 

Regards,

[Darktooth]

The tooth is mackeral shark but unsure of species. Maybe Cretodus crassidens.

[Al Dente]

The tooth looks like a lateral Scapanorhynchus texanus (goblin shark).

[Darktooth]

24 minutes ago, Al Dente said:

The tooth looks like a lateral Scapanorhynchus texanus (goblin shark).

I agree now that I took a second glance.

[Peace river rat]

Looks like the "biscuit" shape is a sea urchin, imo.

[caldigger]

What is the object in upper right?  Can't tell from one photo in background.

[bone2stone]

This has been taxing my thoughts and the Phymasoma texanus echinoid should not be found in same area as the tooth, if it is Scaph.

I think it is more likely a Cretolamna Appendiculata.

They are at least found within the same context time frame. 

Perhaps Weno with a stretch into a Grayson formation.

What do you guys think?

Jess B.

[Uncle Siphuncle]

My first question to the finder regards confidence level that the marine fossils are from the Dessau fm, and how that was concluded, as the Austin Grp is often mapped undivided.  Positive ID of related ammonites and oysters may help decipher that field riddle.

 

There is a Phymosoma bybeei from the Kau, but source formation eludes me off the top of the head as I've not searched for them.

[truceburner]

On 1/24/2017 at 9:58 PM, caldigger said:

What is the object in upper right?  Can't tell from one photo in background.

Looks like a slab of matrix with a few embedded Hamulus sp. worm tubes.

[bone2stone]

On ‎1‎/‎26‎/‎2017 at 6:35 AM, Uncle Siphuncle said:

My first question to the finder regards confidence level that the marine fossils are from the Dessau fm, and how that was concluded, as the Austin Grp is often mapped undivided.  Positive ID of related ammonites and oysters may help decipher that field riddle.

 

There is a Phymosoma bybeei from the Kau, but source formation eludes me off the top of the head as I've not searched for them.

That is true.

They are also found the Arcadia Park materials as well. The bybeei I have found are much smaller than the one pictured here.

 

I question the association of the tooth with the possibility that it originally washed from a deposit that yields much older material.

I just does not strike me as a Scaph. The missing diagnostics of root and good definition at crown of the root is questionable.

I am going to a Grayson deposit this weekend. Hopefully get some pics, teeth and echinoids are abundant in this particular deposit.

Yall have a good weekend.

 

 

Jess B.