Hi there! This is my first post at Fossil Forum, hope this information could help in getting some help to identify this fossil.
It was found at a quarry in Vallecillo, Mexico (northeast part, less than 100 kms from Laredo, Texas).
The fossils found here belong to the the Vallecillo member from the Agua Nueva formation, aparently from late Cenomanian to early Turonian.
The full length including the separate vertebrae is aproximately 29 inches or 74 centimeters.
The longest tooth is aproximately 1.4 centimeters long.
I was only able to post a single picture, hope it helps.