9.9" Dactylioceras Ammonite Cluster - Posidonia Shale, Germany

This is a 9.9" wide cluster of Dactylioceras ammonite fossils from the Posidonia Shale of Germany. Ammonites from this location have been compressed and are preserved on a black slate in a partially pyritized state. It 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.
Dactylioceras sp.
Holzmaden, Germany
Posidonia Shale
Rock 9.9 x 8.2", Largest Ammonite 3.2"
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