Fossil Nautilus are characterized by involute or more or less convolute shells that are generally smooth, with compressed or depressed whorl sections, straight to sinuous sutures, and a tubular, generally central siphuncle.
Having survived relatively unchanged for millions of years, nautiluses represent the only living members of the subclass nautiloidea and are often considered “living fossils”.
Specimen: Cymatoceras sp.
Age: 110 million years ago
Location: Mahajanga - Madagascar
Fossil dimension inch. 7.4 x 7.0 cm 19 x 18
Base dimension inch. 11.0 x 11.8 cm 28 x 30
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