Goniatite ammonites are ancient cephalopods from the Paleozoic era

existing approximately 390 to 251 million years ago (Middle Devonian to Late Permian)

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Early ancestors to Jurassic ammonites

They flourished during the Paleozoic era, appearing in the Devonian and becoming extinct during the Permian-Triassic extinction.

 Roughly 350–400 million years old.

 They are distinguished by simple zigzag or v-shaped suture lines on their shells

 

Widely found in the high  Atlas Mountains of Morocco. 

Goniatites are considered ancestral to later Mesozoic ammonites but are structurally different due to their simpler shell chamber patterns.

This fossil is 300 gram in weight and measures 8 cm's high x 10 cm's long and 2.5 cm's thick

a very clean and nicely polished sample