Hildoceras semipolitum Ammonite Fossil Jurassic France Genuine Specimen CAEN with COA

Description

Genuine Hildoceras semipolitum Ammonite Fossil

This listing is for a beautifully preserved Hildoceras semipolitum ammonite fossil, originating from the Upper Toarcian stage of the Jurassic period, discovered near Caen, France. This fossil is a carefully chosen specimen, photographed clearly so you can see the exact ammonite you will receive. A scale rule with 1cm squares is shown in the images for accurate sizing. This is a rare opportunity to own a scientifically significant ammonite with both collector and educational value.

Geological Age and Locality

The fossil comes from the Upper Toarcian (approximately 174 million years ago), part of the Lower Jurassic system. This period is associated with dynamic marine transgressions that created shallow seas across much of Europe. The region around Caen, Normandy, is renowned for its Jurassic exposures and has produced many important ammonite specimens that serve as biostratigraphic markers for this geological interval.

Species Overview – Hildoceras semipolitum

The species Hildoceras semipolitum belongs to the family Hildoceratidae, superfamily Hildoceratoidea, within the order Ammonitida. This group of ammonites is characterised by its compressed, planispiral coiling and distinctive ribbing patterns. Notable features of this species include:

• A finely ribbed shell with moderate compression.
• Whorls that are ornamented with strong ribs radiating across the flanks.
• A keel along the venter, aiding hydrodynamic efficiency in the water column.

As with other members of the genus Hildoceras, this species played an important role as an index fossil for defining specific stratigraphic intervals in the Toarcian.

Biozone and Scientific Relevance

The presence of Hildoceras semipolitum in the stratigraphic record is used to identify and correlate layers within the Upper Toarcian ammonite biozones. Ammonites like this provide vital tools for paleontologists and geologists to understand Jurassic marine successions. Its distribution across European deposits highlights its importance in biostratigraphy and paleobiogeographic studies.

Depositional Environment

During the Upper Toarcian, much of France was submerged beneath shallow epicontinental seas. Ammonites such as Hildoceras semipolitum thrived as active swimmers and predators in these nutrient-rich marine environments. Upon death, their shells would settle onto the seabed and become preserved in fine sediments that lithified over millions of years. This fossil is therefore a direct record of life in the ancient Jurassic seas of Normandy.

Collectability and Display Value

This ammonite fossil is not only of scientific importance but also of great aesthetic appeal. The distinct ribbing and shell morphology make it a striking specimen for any fossil collection. Whether displayed in a personal cabinet, used for educational study, or simply admired as a piece of natural history, this fossil offers lasting value.

Authenticity Guaranteed

All of our fossils are 100% genuine specimens and come with a Certificate of Authenticity. The fossil you see in the photographs is the exact specimen you will receive, ensuring complete transparency and confidence in your purchase.

This Hildoceras semipolitum ammonite from Caen, France, is a superb example of a Jurassic fossil, offering collectors and enthusiasts a unique opportunity to own a piece of Earth’s history dating back over 170 million years.