Tropidoceras masseanum fossil ammonite – lower pliensbachian, jurassic, lyme regis bay, uk – genuine specimen with coa

Description This is a genuine Tropidoceras masseanum ammonite fossil from the Lower Pliensbachian stage of the Jurassic period, discovered in Lyme Regis Bay, United Kingdom. Ammonites were marine molluscs related to modern squid and cuttlefish, thriving in prehistoric seas for millions of years. Tropidoceras masseanum is a distinctive ammonite species, known for its strong ribbing and evolute coiling. Geological Information: Formation: Lower Lias Group Age: 190-195 million years old (Lower Pliensbachian, Jurassic) Environment: Shallow marine seafloor deposit Location: Lyme Regis Bay, Dorset, UK Fossil Characteristics: Strong, well-defined ribbing along the shell Evolute coiling, with all whorls visible Preserved in natural limestone matrix Distinctive Jurassic marine species Key Features: Authentic Tropidoceras masseanum fossil ammonite Well-preserved with clear shell details From the Alice Purnell Collection 100% genuine specimen with Certificate of Authenticity Scale Rule / Cube = 1cm – Please see photos for accurate sizing. All fossils are securely packaged for worldwide shipping.