Nautilus Fossil | France Agate involute shell with a generally

involute shell with a generally smooth or slightly ribbed surface

1093/zoolinnean/zlaa027

becoming asphalt as the lighter fractions evaporate

The common name comes from their graphic appearance in caves

Nautilus Fossil | France Agate involute shell with a generallyCenoceras sp. Jurassic (201 184 million years ago) Belmont, France Specimen approx. size: 5. 25" x 4" x 3. 25" Cenoceras is an extinct genus of nautiloid cephalopods that thrived from the Late Triassic to the Early Cretaceous. It belongs to the order Nautilida, which includes modern nautiluses. This genus is among the most common and well documented nautiloids from the Jurassic period. Morphological Description Cenoceras had a relatively simple,