3.45" Polished Ammonite (Cleoniceras) Fossil - Madagascar

This is a 3.45" wide, polished ammonite fossil from Ambatolafia, Madagascar. These ammonites are Late Cretaceous in age, or about 110 million years old. The exterior has been polished to reveal the oak-leaf suture pattern under the outer surface of the shell.

Comes with an acrylic 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.
What an ammonite would have looked like while alive.
Cleoniceras sp.
Ambatolafia, Mahajanga Province, Madagascar
3.45" wide
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