Rare Phylloceras Ammonite Fossil from Aptian Cretaceous Alps Haute Provence France Authentic Specimen

Description

Geological Context and Provenance

This rare specimen is a genuine Phylloceras fossil ammonite from the Aptian Stage of the Early Cretaceous Period, approximately 125 – 113 million years ago. It originates from the Alps region of Haute Provence, France, a locality renowned for its richly fossiliferous deposits that document the ancient marine ecosystems of the Tethys Ocean.

The Aptian is a pivotal stage in Earth’s history, marked by significant global changes in climate, sea level, and marine biodiversity. Fossils from Haute Provence are of particular importance, providing valuable insights into the development of Cretaceous ammonite faunas and the depositional environments of the European Tethyan margin.

Fossil Type and Species Information

Phylloceras belongs to the Order Ammonitida, Superfamily Phyllocerataceae, and Family Phylloceratidae. Ammonites of this lineage are characterised by their smooth, finely ribbed, or nearly unornamented shells and their highly complex suture lines. Unlike many other ammonite groups, Phylloceras retained a more streamlined form, which is thought to have contributed to its evolutionary success and long geological range.

This genus is considered one of the most important in ammonite evolutionary history. It originated in the Triassic and persisted until the end of the Cretaceous, making it a key player in Mesozoic marine ecosystems. Phylloceras fossils are highly significant for stratigraphic studies, as they are often used to help define biozones within Cretaceous sequences.

Morphological Features and Identification

The Phylloceras ammonite is distinctive for its elegant, smooth to faintly ribbed shell and involute coiling. The whorls are rounded and relatively compressed, with little or no tuberculation, giving the fossil a refined and streamlined appearance. Its most diagnostic feature is the intricate suture line, where lobes and saddles form highly complex, leaf-like patterns—hence the name Phylloceras (“leaf-horn”).

These morphological traits suggest adaptations for a nektonic lifestyle in open water, with a shell form optimised for efficient swimming. The smooth shell reduced drag, allowing the animal to move swiftly through the marine environment while pursuing prey.

Depositional Environment

During the Aptian, the Haute Provence region was submerged beneath shallow marine seas connected to the Tethys Ocean. Fine-grained limestones and marls accumulated in these environments, preserving ammonites and other marine organisms in remarkable condition.

Ammonites such as Phylloceras would have lived as active predators, feeding on plankton, crustaceans, and small molluscs. They occupied a crucial niche in the food chain, preying on smaller organisms while being hunted by larger marine reptiles and predatory fish. The fossilisation of Phylloceras in the Aptian limestones of Haute Provence captures a snapshot of this vibrant and dynamic ecosystem.

Collector Appeal and Authenticity

This Phylloceras ammonite fossil represents both a scientifically important specimen and a naturally elegant display piece. Its smooth, streamlined shell and intricate suture pattern make it highly distinctive among ammonites. Combined with its provenance from the fossil-rich Haute Provence Alps, this specimen offers collectors and enthusiasts a rare opportunity to own an ammonite from one of the most iconic genera of the Cretaceous seas.

• 100% Genuine Specimen – All fossils we supply are authentic and include a Certificate of Authenticity.
• Exact Fossil Shown – The photographs depict the actual specimen you will receive.
• Scale Reference – Scale rule squares / cube = 1 cm. Please check the images for precise sizing.

This carefully chosen Phylloceras ammonite fossil is a striking reminder of the Early Cretaceous oceans. With its combination of scientific value, rarity, and aesthetic appeal, it makes a superb addition to any fossil collection or natural history display.