Description
Genuine Protetragonites obliquestrangulatus Ammonite Fossil from Angles, France
This is a genuine Protetragonites obliquestrangulatus ammonite fossil from Angles, Alpes-de-Haute-Provence, France, dating to the Lower Cretaceous, Aptian Stage. The Angles area of south-eastern France is well known for its important Cretaceous marine deposits, and ammonites from this region are highly collectable due to their scientific interest, attractive coiled form, and strong connection to classic European fossil localities.
This fossil is a carefully chosen specimen, with the photograph showing the actual ammonite you will receive. Full sizing can be seen in the photo. The specimen also includes a Certificate of Authenticity lifetime guarantee generic card, making it an excellent fossil for collectors, educational displays, geology teaching, natural history cabinets, and anyone interested in authentic Cretaceous marine life.
Fossil Type and Species
Protetragonites obliquestrangulatus is an ammonite, an extinct marine cephalopod related to modern squid, cuttlefish, and nautilus. Ammonites lived inside coiled, chambered shells, with the animal occupying the final outer body chamber. The earlier internal chambers helped regulate buoyancy, allowing the ammonite to move through the water column of the ancient sea.
The genus Protetragonites belongs to the order Ammonitida and is associated with the family Tetragonitidae, a group of Cretaceous ammonites known for elegant, generally smooth to finely ornamented shells. Tetragonitid ammonites are often appreciated by collectors for their balanced spiral form, rounded whorls, and refined appearance compared with more heavily ribbed or spined ammonite groups.
Lower Cretaceous Aptian Age
This ammonite dates to the Aptian Stage of the Lower Cretaceous, approximately 125 to 113 million years old. The Aptian was a significant interval in ammonite evolution, with many ammonite groups spreading through warm marine environments across Europe and beyond. Ammonites are especially important in Cretaceous geology because they evolved rapidly and were widely distributed, making them excellent guide fossils for dating and correlating marine rock layers.
During the Aptian, much of what is now southern France lay beneath warm marine waters connected to the wider Tethyan realm. These seas supported a diverse ecosystem including ammonites, nautiloids, bivalves, gastropods, brachiopods, echinoids, fish, and marine reptiles. Protetragonites would have been part of this active marine environment, moving through the water as a free-swimming cephalopod and using its chambered shell for buoyancy control.
Angles, Alpes-de-Haute-Provence Geological Setting
The locality of Angles in Alpes-de-Haute-Provence, France is an important fossil region within the Lower Cretaceous successions of south-eastern France. This area is associated with marine sediments deposited in ancient basin environments where ammonites were abundant and diverse. Fossils from this part of France are valued not only for their visual appeal but also for their stratigraphic importance, as the region has long been studied for its Cretaceous ammonite faunas.
The sediments that preserved ammonites such as Protetragonites were laid down on the sea floor as muds, marls, limestones, and calcareous deposits depending on local conditions. After death, the ammonite shell could settle into the sediment, become buried, and gradually fossilise over millions of years. Natural mineral staining, matrix attachment, surface texture, shell wear, compression, or colour variation are all part of the fossil’s genuine geological history.
Morphology and Display Features
Protetragonites ammonites are admired for their clean spiral form and attractive shell proportions. The shell is planispirally coiled, forming the classic flat ammonite spiral. Many tetragonitid ammonites have rounded whorls and relatively fine ornamentation, giving them a smooth, elegant appearance that displays well in a fossil cabinet or educational collection.
The species Protetragonites obliquestrangulatus is especially interesting for collectors seeking a named Lower Cretaceous ammonite rather than a general ammonite specimen. Depending on preservation, visible features may include whorl curvature, subtle ribbing or growth lines, chamber structure, shell texture, natural matrix, and mineral colour. These details reflect both the biology of the original cephalopod and the geological processes that preserved it.
Collectable French Cretaceous Ammonite with Certificate of Authenticity
This Protetragonites obliquestrangulatus ammonite fossil is a genuine specimen and includes a Certificate of Authenticity lifetime guarantee generic card. The photo shows the actual fossil supplied, making this a carefully selected individual specimen rather than a stock image.
With its Lower Cretaceous Aptian age, Angles, Alpes-de-Haute-Provence locality, named species identification, and classic ammonite form, this fossil is a desirable addition to any collection of French fossils, Cretaceous ammonites, cephalopods, marine fossils, or authentic natural history specimens.
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