5" Jurassic Ammonite (Hemilytoceras) Fossil - Madagascar

Jurassic Ammonite (Hemilytoceras) Fossil - Madagascar #226731

This is a 5" wide, Late Jurassic ammonite (Hemilytoceras) fossil collected near the town of Sakaraha in the Tulear Province of Madagascar. It comes with an acrylic display stand.

Ammonites were predatory cephalopod mollusks that resembled squids with spiral shells. They are more closely related to living octopuses, though their shells resemble that of nautilus species. True ammonites appeared in the fossil record about 240 million years ago during the Triassic Period. The last lineages disappeared 65 million years ago at the end of the Cretaceous.

What an ammonite would have looked like while alive.

More about ammonites