91MM Perisphinctes Ammonite Fossil Nautilus Madagascar Jurassic Age COA dup-review-publication Cambrian ecosystems

Cambrian ecosystems

further reducing survival to adulthood

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

Fossil nesting sites indicate that Hypacrosaurus produced large clutches of eggs

Few fossils emerge intact and perfect

91MM Perisphinctes Ammonite Fossil Nautilus Madagascar Jurassic Age COA dup-review-publication Cambrian ecosystemsLocation: 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