11.1" Bumpy Ammonite (Douvilleiceras) Fossil - Giant Specimen!

This is a huge Douvilleiceras ammonite from the Upper Cretaceous of Madagascar. This genus of ammonites has earned the local name "Tractor Ammonites", due to their distinctively bumpy surface and pronounced ridges which resemble a tractor's tires. This particular example has been nicely prepared to remove the hard rock and expose the shell.

Comes with a metal 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.
Douvilleiceras mammilatum
Mahajanga Province, Madagascar
11.1" wide
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