Perisphinctes ammonite fossil
This Perisphinctes ammonite fossil originates from Tulear in Madagascar.
Ammonite dates from the Upper Jurassic period and is approx. One hundred twelve million years old Ammonites first appearing in the fossil record 240 million years ago, descending from straight shelled cephalopods. The last lineages disappeared around 65 million years ago towards the end of the Cretaceous.