A beautiful ammonite fossil Acanthoceras sp., dating to the Albian stage of the Early Cretaceous (approx. 113–100 million years ago). This impressive specimen displays the characteristic strong, ribbed ornamentation typical of the genus, along with excellent overall preservation. On one side of the ammonite, the remains of a bivalve are visible, adding further paleontological interest to the piece and offering a glimpse into the ancient marine environment in which both organisms lived. A highly decorative and scientifically valuable fossil — ideal for collectors and enthusiasts.