Massive Devonian Goniatitic Ammonite

Goniatite Ammonites

Phylum Mollusca, Class Cephalopoda, Subclass Ammonoidea, Order Goniatida

Geological Time: Devonian (~ 400 million years ago)

Size: 265 mm across by 200 mm tall by 120 mm thick with 200 mm by 170 mm living chamber

Fossil Site: Atlas Mountains, Morocco

Fossil Code: KZC28

Price: $425.00

Massive AmmoniteDescription: The ammonites shown here are known as having the Goniatite septal pattern. Ammonites developed septa (separations between individual chambers) with intricate folds termed lobes and saddles. There are three basic patterns:

  • Goniatiitc: Irregular zigzag
  • Ceratitic: Regular wavy
  • Ammonitic: Intricate, fernlike

These patterns are evidenced on the exterior of the shell as sutures. These ammonites have been polished to show the sutures in all their glory. The Ammonidea have a rich evolutionary history which began in the Upper Silurian/Lower Devonian. The order began an extensive radiation in the Triassic and Jurassic, and became most diverse during the Cretaceous, only to become extinct during the late Cretaceous extinction event which also saw the demise of the non-avian dinosaurs. The Goniatite forms became extinct during the Permian. This specimen is thicker than most examples are long

Ammonite Fossils Purchase Information

click pictures to enlarge and see both sides

Fossil Mall Navigation:
l Home l Fossils for Sale Map l Museum and Rare Fossils l How to Buy Fossils l

Navigate by Fossil Category:
l Trilobites
l Ammonites l Fish Fossils l Invertebrate Fossils l
l Crinoids and Echinoderms l Insect Fossils l Dinosaur and Reptile Fossils l
l Cambrian Explosion Fossils l Plant Fossils l Stromatolites l
l Vertebrate Fossils l Fossil Amber l Trace & Ichnofossils l

l Fossils and Paleotological Science Information l