This is a huge, 15.8" wide ammonite fossil from Madagascar. It is Late Jurassic in age and it was collected near Sakaraha, Madagascar. The outer shell has been worn away leaving the intricately patterned sutures of the inner shell.
Comes with display stand.
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. Ammonites appeared in the fossil record about 240 million years ago and they barely survived several major extinction events. The last lineages disappeared 65 million years ago at the end of the Cretaceous.
Artists reconstruction of an ammonite. By Nobu Tamura