Orthoceras fossil shell with ammoniteOrder number: 61.706
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Orthoceras: a group of animals belonging to the cephalopods - they were the closest relatives of the ammonites.
The nautiloids ("Geradhörner") lived in the sea with a cylindrical shell, which was divided into segments. Movement in the "recoil nozzle principle" in a horizontal position by inflow and squeezing of the water.
The muscular catch arms on the head earned them the name.
They were good and fast swimmers - considered cruel, carnivorous robbers.
Age: approx. 280 - 320 million years
Location: North Africa, Morocco and Altas Mountains
Occurrence: Ordovician to Triassic
Size: Ordovician reached a length of up to 5 meters.
Orthoceras fossil shell with AMMONIT -
Diameter Ø: approx. 25 cm
Height: about 2.5 cm
Weight: approx. 750 gr
The 2 photos show examples (each one of course is unique)!
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