Fossilized nautilus - Fossilised animal - cymatoceras - 18 cm - 14.5 cm






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A polished fossilised Cymatoceras nautilus from Madagascar, dating to the Cretaceous, weighs 1.9 kg and measures 18 × 14.5 × 11 cm.
Description from the seller
Cymatoceras is a fossil genus of nektonic marine mollusc cephalopods whose documentation dates back to the Lower Cambrian. From a morphological point of view, the Cretaceous specimens shared many features with modern Nautilus. The shell is globose, with a rounded whorl section, planispiral, varying from slightly evolute to involute with closed umbilici. The Cymatoceras species were nektonic, active predators, with feeding habits considered, in line with those of today, to be protein consumers. The shell thickness of Cymatoceras seems to indicate greater resistance to the hydrostatic pressure of deep waters. It has been calculated that they could reach depths of up to 250 m, since the simple septa of nautiloids are adapted to high hydrostatic pressures. Lot incredibly beautiful: 1.900 kg (L 14.5 cm, W 11 cm, H 18 cm) for this beautiful fossil nautilus Cymatoceras specimen. Stand not included, made from recycled material and used for photographic purposes only.
Seller's Story
Cymatoceras is a fossil genus of nektonic marine mollusc cephalopods whose documentation dates back to the Lower Cambrian. From a morphological point of view, the Cretaceous specimens shared many features with modern Nautilus. The shell is globose, with a rounded whorl section, planispiral, varying from slightly evolute to involute with closed umbilici. The Cymatoceras species were nektonic, active predators, with feeding habits considered, in line with those of today, to be protein consumers. The shell thickness of Cymatoceras seems to indicate greater resistance to the hydrostatic pressure of deep waters. It has been calculated that they could reach depths of up to 250 m, since the simple septa of nautiloids are adapted to high hydrostatic pressures. Lot incredibly beautiful: 1.900 kg (L 14.5 cm, W 11 cm, H 18 cm) for this beautiful fossil nautilus Cymatoceras specimen. Stand not included, made from recycled material and used for photographic purposes only.
