Praestriacites praenuntius Ammonite Fossil France Jurassic Bajocian COA Deux-Sèvres Nouvelle-Aquitaine Marine Specimen

Description

Genuine Praestriacites praenuntius Ammonite Fossil

This listing is for a genuine Praestriacites praenuntius ammonite fossil from Deux-Sèvres, Nouvelle-Aquitaine, France. Dating from the Bajocian Stage of the Jurassic Period, this specimen represents a fascinating marine cephalopod from the ancient seas that once covered parts of western Europe during the Middle Jurassic.

Praestriacites praenuntius is a collectible ammonite species with strong appeal for fossil collectors, geology enthusiasts, educational collections, and natural history displays. Its named species, French locality, Jurassic age, and attractive ammonite form make it a desirable specimen for anyone interested in European ammonite faunas and the marine life of the Mesozoic Era. This fossil is a carefully chosen piece, and the photograph shows the actual specimen you will receive. Full sizing can be seen in the photo.

Geology, Age and French Locality

This ammonite comes from Deux-Sèvres, in the Nouvelle-Aquitaine region of western France. This area is well known for Jurassic marine deposits, including fossil-bearing limestones, marls, and sedimentary rocks that preserve evidence of ancient shallow seas. During the Bajocian, much of this region lay beneath warm marine waters connected to broader European shelf seas.

The Bajocian Stage dates to approximately 170 to 168 million years ago and is one of the key stages of the Middle Jurassic. It was a time of important ammonite diversification, with many distinctive forms evolving in marine environments across Europe. Bajocian ammonites are especially useful in palaeontology because their rapid evolution and wide distribution allow geologists to date and correlate rock layers with a high degree of precision.

The sedimentary rocks of western France record changing marine conditions, including shallow shelf settings, carbonate deposition, and seabeds rich in shells and marine invertebrates. Fossils from these deposits offer an important window into the Jurassic seas that once covered the region.

Fossil Type and Species Details

Praestriacites praenuntius was an ammonite, an extinct marine mollusc belonging to the cephalopod group. Ammonites are related to modern squid, cuttlefish, octopus, and nautilus, although they became extinct at the end of the Cretaceous Period. Like other ammonites, Praestriacites had a coiled external shell divided internally into chambers. The living animal occupied the final body chamber, while the earlier chambers helped control buoyancy in the water.

The shell of Praestriacites praenuntius would have been planispirally coiled, meaning it grew in a flat spiral. Ammonites of this general type often show well-developed whorls, visible ribbing or growth ornament, and complex suture patterns where the internal chamber walls met the outer shell. These features are important for identification and make ammonites highly valued by collectors and researchers alike.

Scientific classification places ammonites within Phylum Mollusca, Class Cephalopoda, Subclass Ammonoidea, and Order Ammonitida. Praestriacites praenuntius forms part of the diverse Jurassic ammonite faunas that help define and characterise the Bajocian marine record of Europe.

Ancient Jurassic Marine Environment

During the Bajocian, the area now known as Deux-Sèvres was part of a marine landscape very different from today. Warm shallow seas covered large parts of what is now France, creating ideal conditions for ammonites and many other marine animals. These waters supported a wide range of life, including belemnites, bivalves, brachiopods, gastropods, echinoids, corals, fish, crustaceans, and marine reptiles.

Praestriacites praenuntius would have lived in this marine environment as an active or free-floating cephalopod. Its chambered shell allowed it to regulate buoyancy, helping it move through the water column while feeding and avoiding predators. Ammonites were an important part of Jurassic marine ecosystems and remain among the most iconic fossils from this period.

The fossil-bearing sediments of Nouvelle-Aquitaine preserve the remains of these ancient ecosystems, making specimens from the region especially interesting for collectors who appreciate fossils with strong geological and geographical provenance.

Collectible European Jurassic Ammonite

This Praestriacites praenuntius ammonite fossil is a desirable specimen for collectors of ammonites, Jurassic fossils, French fossils, European palaeontology, and scientifically labelled fossil material. Its Bajocian age, Deux-Sèvres locality, and named species identification give it strong educational and display value.

This fossil is a genuine specimen and includes a Certificate of Authenticity lifetime guarantee generic card. The photo shows the actual fossil you will receive, making this a carefully selected and accurately represented collector’s piece from the Jurassic marine deposits of Nouvelle-Aquitaine, France.