4.5" Devonian Ammonoid (Anetoceras) With Trilobite Parts

This is a 4.5" wide specimen of the Early Devonian ammonoid cephalopod Anetoceras quarried in the Anti-Atlas Region of Morocco. The ammonoid cephalopod has been painstakingly prepared from the hard limestone matrix that it was found. This particular specimen displays segments of a trilobite.

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.