Ammonoids appeared early in the Devonian Period. The four groups (Suborders) of early ammonoids that developed during the Devonian period are called "palaeoammonoids." The Suborders are: Clymeniia, Anarcestina, Prolecanitina, and the famous Goniatitina. The palaeoammonoid fossils offered for sale here are of Devonian age, about 400 million years old. They were collected in the Atlas mountains of Morocco and prepared there.
These ammonoids lived from early Devonian to the end Devonian extinction event. Anarcestina are distinguished by the ventral retrochoanitic siphuncle. Anarcestina developed from the Bactritina in the lower Devonian and are ancestral to the other three palaeoammonids listed below.
Clymeniia is found only in late Devonian sediments.
Prolecanitina lived from late Devonian times well into the Triassic Period.
Goniatites appear in Devonian age rocks becoming extinct during the great dying catastrophe that marked the end of the Permian Period. Goniatites were important palaeoammoniods and ancestral to the ammonites.
These Palaeoammonoids we have for sale are free-standing and make beautiful conversation or display pieces. Moroccan fossils are relatively inexpensive to own and make excellent gifts for the fossil collector or paleontologist.