Erycites fallifax Ammonite Fossil Jurassic Belgium Genuine COA Card Bajocian - Lower Jurassic Marine Cephalopod Specimen


£ 60.00

Erycites fallifax Ammonite Fossil from Belgium

This is a genuine Erycites fallifax ammonite fossil from the Middle Jurassic,
Lower Bajocian stage, collected from Belgium. This carefully chosen fossil is a desirable European Jurassic marine cephalopod specimen, selected for its natural form, geological interest, and collectable display appeal. It is supplied with a Certificate of Authenticity lifetime guarantee generic card, making it a trusted addition to an ammonite collection, fossil cabinet, educational geology display, natural history collection, or prehistoric gift selection.

The photograph shows the actual fossil specimen you will receive. Full sizing and scale can be seen in the photo.

Geological Age and Locality

This ammonite dates to the Lower Bajocian, part of the Middle Jurassic Period, approximately 170 million years old. The Bajocian was an important time in ammonite evolution, with many distinctive ammonite groups developing across the warm marine seas of Europe. Fossils from this stage are especially valued because ammonites evolved rapidly and are widely used by geologists to identify and correlate Jurassic rock layers.

During the Middle Jurassic, parts of what is now Belgium were covered by shallow to moderately deep marine environments connected to broader European seaways. These ancient seas deposited limestones, marls, clays, sands, and shell-rich sediments, preserving a wide variety of marine fossils including ammonites, belemnites, bivalves, brachiopods, gastropods, crinoids, echinoids, fish remains, and other prehistoric sea life.

Fossil Type and Species

This specimen is identified as Erycites fallifax, an extinct ammonite species. Ammonites were marine molluscs related to modern squid, cuttlefish, octopus, and nautilus. They had hard external shells divided internally into chambers. The living animal occupied the outer body chamber, while earlier chambers helped regulate buoyancy, allowing the ammonite to move through the water column.

Erycites is associated with the family Erycitidae, a Jurassic ammonite group known for strong shell ornament and classic coiled ammonite form. Erycitid ammonites are part of the wider ammonoid cephalopod lineage and are valued for their importance in Jurassic marine biostratigraphy. Their shell form, ribbing, whorl shape, and growth pattern help distinguish them from other ammonite groups.

Morphology and Notable Features

Erycites ammonites are appreciated for their bold Jurassic character. They commonly show a coiled planispiral shell, visible whorls, a defined umbilical region, and ornamentation that may include strong ribbing across the shell. The ribbed surface gives the fossil a textured appearance and records the growth of the animal throughout its life.

The shell was built in chambers separated by internal walls called septa. Where these septa met the outer shell, they formed suture lines, which are important in ammonite classification. Even when fine sutures are not clearly visible, the shell shape, whorl proportions, ribbing, and overall structure preserve valuable evidence of the ammonite’s biology and ancient environment.

As a genuine fossil, this specimen may show natural matrix, mineralisation, fossil shell texture, colour variation, weathering, small chips, cracks, or areas of natural wear caused by fossilisation and geological history. These features are normal for authentic fossils and add to the individuality of the piece. The photo shows the exact specimen being offered, allowing the buyer to view its preservation, condition, size, and display quality before purchase.

Middle Jurassic Marine Environment

This Erycites fallifax ammonite lived in warm Jurassic seas during the Lower Bajocian. These waters supported a rich marine ecosystem, with ammonites and belemnites swimming through the water column while bivalves, brachiopods, crinoids, echinoids, and other invertebrates lived on or within the seabed. Fish and marine reptiles also formed part of the wider Jurassic marine world.

Ammonites were active swimming or drifting cephalopods, likely feeding on small prey using tentacles. After death, the shell could settle onto the seabed and become buried by sediment. Over millions of years, compaction, mineralisation, and geological change transformed the shell and surrounding sediment into fossil-bearing rock. This specimen is a direct link to the Middle Jurassic seas of Europe, from a time when dinosaurs lived on land and ammonites flourished in the oceans.

Authenticity and Collectability

This Erycites fallifax ammonite fossil is a genuine specimen from Belgium, dating to the Lower Bajocian stage of the Middle Jurassic, and includes a Certificate of Authenticity lifetime guarantee generic card. It is suitable for collectors of Belgian fossils, Jurassic ammonites, Lower Bajocian fossils, Middle Jurassic marine fossils, European fossils, natural history specimens, educational geology pieces, and display fossils.

This carefully selected fossil includes a Certificate of Authenticity lifetime guarantee generic card, and the fossil shown in the photo is the actual specimen you will receive.