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Ammonites

Ammonites were named for their resemblance to horns of Amon, the Egyptian god depicted as a man with a ram’s head. These “horns” were actually the external shells of a group of cephalopods. Modern cephalopods include the squids, octopuses, cuttlefishes, and the chambered nautilus. The soft parts of ammonites have been inferred in part by comparison with the modern Nautilus. The shell would have provided some protection from potential predators as well as a means of buoyancy regulation. Like the predatory Nautilus, ammonites likely possessed large eyes, a sharp beak, and tentacles. Ammonites are members of the order Ammonoidea that possess convoluted divisions between the many chambers of the shell. Ammonite species flourished in the earth’s seas for over 185 million years, from the late Paleozoic until the end of the Cretaceous Period, when they disappeared from the fossil record along with the dinosaurs.

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  1. F0164 Fossil Ammonite Hoploscaphites nicoletti, Late Cretaceous, South Dakota (SOLD)

    F0164 Fossil Ammonite Hoploscaphites nicoletti, Late Cretaceous, South Dakota (SOLD)

    $750.00

    Out of stock

    F0164 Fossil Ammonite Hoploscaphites nicoletti, Late Cretaceous, South Dakota Learn More
  2. F0163 Fossil Ammonite Cleoniceras sp., Middle Cretaceous, Madagascar

    F0163 Fossil Ammonite Cleoniceras sp., Middle Cretaceous, Madagascar

    $350.00

    F0163 Fossil Ammonite Cleoniceras sp., Middle Cretaceous, Madagascar Learn More
  3. F0105 - Ammonites in Matrix from England

    F0105 - Ammonites in Matrix from England

    $875.00

    Asteroceras sp. and Promicroceras sp. from Charmouth, England. Learn More
  4. F0102 - Liparoceras chetiense Ammonite

    F0102 - Liparoceras chetiense Ammonite

    $375.00

    Liparoceras chetiense Ammonite Learn More
  5. F0097 - Jeletzkytes spedemi Ammonite Fossil

    F0097 - Jeletzkytes spedemi Ammonite Fossil

    $70.00

    Jeletzkytes spedemi Ammonite Fossil from South Dakota. Learn More
  6. F0095 - Ammonite from South Dakota on Wooden Base

    F0095 - Ammonite from South Dakota on Wooden Base

    $415.00

    Jeletzkytes nebracensis from South Dakota Learn More
  7. F0083 - Fossil Ammonite on Matrix (SOLD)

    F0083 - Fossil Ammonite on Matrix (SOLD)

    $135.00

    Out of stock

    Hoploscaphites nodosus from South Dakota Learn More

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