Description
Exceptional Hildoceras bifrons Ammonite Fossil
This listing offers a genuine Hildoceras bifrons ammonite fossil from the Middle Toarcian stage of the Jurassic period, discovered in Aveyron, France. This fossil is a carefully selected specimen that shows remarkable preservation and displays the coiled shell structure characteristic of this iconic ammonite species. The provided photographs show the exact fossil you will receive, with a scale cube of 1cm squares to provide accurate sizing for collectors and enthusiasts.
Geological Age and Provenance
The fossil originates from the Middle Toarcian (approximately 174–182 million years ago), a subdivision of the Lower Jurassic. This time period was marked by dynamic marine environments where ammonites thrived in abundance. Aveyron, located in southern France, is well-known for producing beautifully preserved ammonite specimens, making it an important locality for Jurassic fossil collectors.
Species Details – Hildoceras bifrons
Hildoceras bifrons is one of the most recognizable ammonite species, belonging to the family Hildoceratidae, within the superfamily Hildoceratoidea and order Ammonitida. It is named for its distinctive features, including:
- Planispiral coiling with a compressed shell.
- Keel and ribbing along the whorls, giving the fossil a striking appearance.
- Morphological traits that make it an excellent index fossil for the Toarcian stage.
Its widespread distribution across Europe has made it an important species in paleontological studies, helping geologists establish biozones and stratigraphic markers for Jurassic sequences.
Scientific Importance and Biozone
Hildoceras bifrons is a zone ammonite, meaning it is used to define specific biozones within the Toarcian stage. The presence of this fossil allows geologists to pinpoint relative dating in stratigraphy, particularly in Western Europe. The bifrons biozone is a key marker interval, which makes this fossil not only a collector’s piece but also a scientifically significant specimen.
Depositional Environment
During the Toarcian, much of Europe, including modern-day France, was submerged under shallow seas. Ammonites such as Hildoceras bifrons inhabited these marine environments, living as active nektonic predators or scavengers. Their shells would eventually sink to the seabed upon death, where they became buried in sediments that later lithified into rock, preserving them for millions of years.
Collectability and Authenticity
This ammonite has been chosen for its distinct morphology, historical value, and visual appeal. It represents an authentic snapshot of ancient marine life from nearly 180 million years ago. Fossils of this quality are sought after by collectors, students of geology, and those with a passion for natural history.
All of our fossils are 100% genuine specimens and are accompanied by a Certificate of Authenticity for your assurance. This ensures the specimen’s provenance and adds lasting value to your collection.
Display and Educational Value
The strong ribbing, elegant shell structure, and distinct Jurassic origin make this ammonite fossil a superb display piece. It is equally suitable for private collections, museum displays, or educational purposes. Students and enthusiasts will appreciate its clear geological context and scientific relevance, while collectors will value its rarity and beauty.
By owning this fossil, you are holding a tangible piece of Earth’s deep past – a unique reminder of life in the ancient seas of the Jurassic.





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