Description
Location: Near Sakaraha, Tulear Province, Madagascar
Weight: 6 Ounces
Dimension: 87MM - 3.5 Inches Long, 2.9 Inches Wide, 0.9 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 from the Triassic through the Cretaceous periods, spanning approximately 175 million years of evolutionary history. The specimen's characteristic ribbed morphology and logarithmic spiral geometry reflect adaptive features that enhanced hydrodynamic efficiency during predation and migration. Phylogenetically related to extant Nautiloidea, ammonites represent a distinct lineage that underwent mass extinction at the K-Pg boundary. This Madagascar-sourced fossil, authenticated with documentation, provides paleontological significance for both scientific study and connoisseur collections, offering tangible evidence of ancient marine biodiversity.
