91MM Perisphinctes Ammonite Fossil Nautilus Madagascar Jurassic Age COA dup-review-publication further reducing survival to adulthood

further reducing survival to adulthood

reaching a height as tall as the highest point of the back of the skull

These horns began as small growths in early species and eventually expanded into massive structures

including two generally symmetrical valves that vary from rounded to oval in outline

91MM Perisphinctes Ammonite Fossil Nautilus Madagascar Jurassic Age COA dup-review-publication further reducing survival to adulthoodLocation: Near Sakaraha, Tulear Province, Madagascar Weight: 8. 3 Ounces Dimensions: 91MM 3. 6 inches long, 3. 4 inches wide, 1. 1 inches thick Comes with a Certificate of Authenticity. The items pictured are the ones you will receive. Perisphinctes Ammonite Perisphinctes ammonite exemplifies the taxonomic diversity of Jurassic cephalopods. As members of the subclass Ammonoidea, these organisms occupied critical ecological niches in marine food webs