Ptychodus IDs? Central Texas

[TSCannon]

Hi all - found a small outcrop in an area mapped as “Eagle Ford Group and Buda Limestone undivided.” I filled a plastic bag with crumbly matrix and have so far found 2 Ptychodus teeth amongst other shark and fish teeth and fragments. 
 

Can anyone help narrow down an ID on these two? I’ve also included a photo of some of the matrix I gathered. Curious if anyone can tell the age or more details based on its appearance and the IDs of these teeth.

 

Thanks!

 

 

[erose]

Go to this thread on the FF: 

 

[erose]

Also this month the meeting of the Paleontological Society of Austin (https://www.austinpaleo.org) is going to feature a presentation on a. great Eagle Ford location by one of our members. Ptychodus will certainly be featured. You can get information on the meeting at the web site. Everyone is welcome.

[TSCannon]

9 minutes ago, erose said:

Go to this thread on the FF: 

 

Thanks. That guide is really helpful. I did read through it and was able to eliminate a few species, but I didn’t feel confident enough in my ID skills to make a solid ID. I know there are a few experienced folks on here and thought someone might recognize the species by sight. 

[TSCannon]

2 minutes ago, erose said:

Also this month the meeting of the Paleontological Society of Austin (https://www.austinpaleo.org) is going to feature a presentation on a. great Eagle Ford location by one of our members. Ptychodus will certainly be featured. You can get information on the meeting at the web site. Everyone is welcome.

That’s great to hear! I’m a relatively new member, but I actually came to the last meeting and watched the presentation on the museum reopening. Hopefully I can make it to this one too!

[Fossildude19]

@LSCHNELLE  @Jared C  @EPIKLULSXDDDDD

[Jared C]

Guessing P. anonymous, your site seems to be cenomanian

[erose]

On 10/11/2023 at 10:50 AM, Jared C said:

Guessing P. anonymous, your site seems to be cenomanian

Yes, knowing the age of the formations will really help.

[LSCHNELLE]

Having the formations helps refine the species because there is often variability within each species. I think JaredC is correct about the Cenomanian age. But, two features of the tooth with the moderate bump at one end, point it towards Ptychodus occidentalis:

(1) The ridges typically run to the marginal edge on lateral file teeth with 7 to 10 ridges.

(2) I often find the rhombic-shaped lateral files have a decent little bump. It is often higher than a Ptychodus anonymous.

 

The second tooth with flatter top is likely also a Ptychodus occidentalis. But, it is a posterior file tooth with much flatter crown. It is very similar to a P. anonymous. Still, it usually has more ridges (5+ - yours has 6) than a posterior file P. anonymous (3 - 5) and P. anonymous ridges usually don't extend fully to the crown margin like yours does.