4.3" Cretaceous Ammonite (Calycoceras) - Texas

Cretaceous Ammonite (Calycoceras) - Texas #93539

This is an unusual Calycoceras tarrantense ammonite fossil from the Late Cretaceous Woodbine Formation of Texas. Comes with a display stand.

Ammonites were predatory mollusks that resembled a squid with a shell. These cephalopods had eyes, tentacles, and spiral shells. They are more closely related to a living octopus, though the shells resemble that of a nautilus. True ammonites appeared in the fossil record about 240 million years ago. The last lineages disappeared 65 million years ago at the end of the Cretaceous.

What an ammonite would have looked like while alive.