Cleoniceras Fossil Ammonite with Exposed Chambers - Madagascar Cretaceous Ammonite - Height: 350 mm - Width: 195 mm- 2304 g - (1)

Madagascar Cretaceous Ammonite on Gold-Coloured Metal Stand — Fascinating fossil ammonite of the genus Cleoniceras, from Madagascar and dating to the Early Cretaceous, roughly the Albian stage. A paleontological specimen with great visual impact, carefully prepared and presented on a gold-painted metal base, designed to support it vertically and transform it into an elegant display piece. The central part of the fossil has been sectioned and polished to highlight the complex internal structure of the shell. The cut allows a clear view of the succession of chambers that made up the phragmocone, arranged in a regular spiral around the nucleus. During the animal’s life, these cavities were separated by septa and connected by a thin duct called a siphuncle, through which the ammonite regulated its orientation in the water. The chambers show a remarkable variety of natural tones, from gray and beige to honey, amber, and reddish-brown. Some cavities have been affected by mineralization and display small crystals that reflect light, creating delicate points of brightness. The fine light lines delimiting the chambers render the internal architecture of the fossil perfectly readable. Along the outer areas are visible intricate suture lines, resembling tiny ferns, plant branches, or arabesques. These patterns represent the contact points between the internal septa and the shell wall and constitute one of the most characteristic elements of evolved Cretaceous ammonites. Their complexity transforms the surface into a natural graphic composition, unique to each specimen. Ammonites were marine cephalopod mollusks, distant relatives of today’s nautiluses, squids, and octopuses. They populated the oceans for hundreds of millions of years, diversifying into a vast array of forms before going extinct at the end of the Cretaceous, about 66 million years ago. Owing to their widespread distribution and rapid evolution, they today serve as important guide fossils for dating sedimentary rocks. The golden support follows the curved profile of the shell and enhances its spiral geometry without concealing its details. The contrast between the gold-colored metal and the warm mineralized hues gives the whole piece a refined and dramatic look, suitable for both a paleontological collection and a contemporary setting or a Wunderkammer. The photographs show the fossil from different angles and are an integral part of the description. Technical data Fossil: ammonite Genus: Cleoniceras Period: Early Cretaceous, Albian Provenance: Madagascar Preparation: central section ground to reveal the internal chambers Support: base in gold-colored painted metal