Grayson County Creek - October 8, 2024

@Thomas1982
A Devonian brittle star is definitely on my wish list!

@Jared C I agree that the other Cretodus is pretty different. It actually took me a long time to settle on the genus because it stands out from most of my other Kau/Kef Cretodus specimens especially in terms of root morphology. It seems reminiscent of C. semiplicatus from the Cenomanian, but also shares many characteristics with the co-occurring teeth, so it's hard to make sense of it all. I think at the end of the day, this tooth is from the upper jaw and the previous tooth is from the lower of the same species.
 
There were definitely two species as the very least, given that C. crassidens and C. houghtonorum lived together!
 
Beyond those species, Cretodus, I think, could be the taxonomically messiest large Cretaceous shark genus in TX. Shimada did some good work separating them into 3 grades, but I have some hesitancy on the validity of those categorizations...
 
All I can say for sure is that all of these Cretodus teeth have the strongest affinities with C. houghtonorum, but I doubt they are the same species!

compared to the Cretodus that came before this in your album, I see a lot of differences. I wonder if the the early Coniacian has two species...

Thank you so much for your kind words 

Bonjour , c'est la première fois que je vois des fossiles d'Irlande , et vos préparations sont remarquables , très belles et permettent un retour dans
le temps impressionnant , Merci 
 

@Mikrogeophagus - these were finds from last year! Just finally getting them uploaded to the albums.....I am hoping to go back in January...that seems the best time to find em

Galveston trip report coming soon??

Sorry for a little confusion. The fish is NOT Palaeoniscum, it is Paramblypterus... Better to do not too many things at the same time..., photographed and archieved lot of Permian Material from Harz (Kupferschiefer with Palaeoniscum) and Permian Material from Pfalz Region (with Paramblypterus)... So, due to this and because I've always been a bit absent-minded , things got mixed up...

Interesting, it does look like it could be the same morphology. Too bad the enamel's gone.

Yes, each photo will be treated as a separate entry in the album, as that is the way the software is configured.