Texas Cretaceous Fossil-Need help

[Tunis]

I found this in the same area where I found the Corbula plate. Found west of Austin, on Highway 290. It was partially still covered, in the side of the road cut, when I slowly wiped away the matrix. Couldn’t believe the length. Immediately stopped collecting and took it to the car for safe keeping. It is not the shell itself but a mold of the shell. Always wondered on the identification. Can someone help me? Thank you in advance.

 

[ricardo]

Hello

 

Nerinea sp.

 

Regards

 

 

[DPS Ammonite]

10 minutes ago, ricardo said:

Hello

 

Nerinea sp.

 

Regards

 

 

Here’s a picture of some Texas Nerinea species. It looks like an internal mold since there is no external ornamentation. 

 

http://www.thefossilforum.com/index.php?/topic/60518-id-request-texas-lower-cretaceous-invertebrate/&do=findComment&comment=644720

 

[Planko]

Wow cool find! 

[abyssunder]

The shell was almost totally dissolved.

Boxwork features might be vissible there, as I see might be combined with bioerosional marks. The bioerosional marks was made by boring sponges in my thinking, so you may have there trace fossils like Entobia.

[Tunis]

Thanks to all who helped with information or comments. I had never found anything quite like this before, and never as large/perfect. I appreciate you and the Forum.

[abyssunder]

1 minute ago, Tunis said:

Thanks to all who helped with information or comments. I had never found anything quite like this before, and never as large/perfect. I appreciate you and the Forum.

It's a nice specimen. Thank you posting here. 

[JamieLynn]

Great find. Those are rare to find that size!