Protetragonites quadrisulcatus Ammonite Fossil Aptian Cretaceous France Genuine Certified

Description

Authentic Protetragonites quadrisulcatus Ammonite Fossil from France

This exceptional Protetragonites quadrisulcatus ammonite fossil originates from the Aptian stage of the Early Cretaceous period (approximately 125–113 million years ago) and was discovered in Angles, Haute-Provence, France. A beautifully preserved and scientifically important fossil, it represents one of the characteristic ammonite species that thrived during this key geological interval. This specimen is a genuine piece of natural history, and the photographs provided show the exact ammonite you will receive, with a 1 cm scale cube included for accurate sizing. Each fossil comes with a Certificate of Authenticity, confirming it as a 100% genuine specimen.

Geological and Paleontological Context – Aptian Stage of the Cretaceous

The Aptian stage is a significant subdivision of the Early Cretaceous, marking a time of evolutionary diversification for ammonites and other marine fauna. During this interval, warm epicontinental seas spread across large areas of Europe, including what is now southern France. The sedimentary deposits of Angles in Haute-Provence preserve remarkable ammonite assemblages, providing crucial insight into Cretaceous paleoenvironments and stratigraphy. Fossils from these formations are highly prized by both collectors and researchers due to their excellent preservation and the stratigraphic precision they provide.

Scientific Classification

• Class: Cephalopoda
• Subclass: Ammonoidea
• Order: Ammonitida
• Superfamily: Tetragonitoidea
• Genus: Protetragonites
• Species: Protetragonites quadrisulcatus

This species is well-documented within the Aptian biozones and is considered an important index fossil, making it highly useful in correlating geological strata across different regions.

Morphological Features

Protetragonites quadrisulcatus is distinguished by its slender, elongated shell with characteristic longitudinal sulci (grooves) that give the species its name. These grooves divide the whorls into quadrants, creating a unique and recognisable profile that sets it apart from other ammonites. The shell typically displays a smooth surface aside from these defining sulci, with a slightly compressed cross-section and evenly coiled whorls. Such morphological adaptations may have influenced the hydrodynamics of the shell, aiding in buoyancy control and efficient movement within the marine environment.

Paleoenvironment and Ecology

During the Aptian, the marine environments of what is now Provence were part of a shallow, warm sea rich in planktonic life. Ammonites like Protetragonites quadrisulcatus were active nektonic cephalopods, using jet propulsion to move through the water column in pursuit of prey. They fed on small crustaceans, mollusks, and other planktonic organisms, playing an important role in the marine food chain. Their widespread distribution and abundance reflect the thriving ecosystems of the Early Cretaceous seas.

Collector and Display Value

This Protetragonites quadrisulcatus ammonite fossil is not only scientifically valuable but also an elegant natural specimen. Its distinct grooved morphology makes it an immediately recognisable species, and its provenance from the classic Aptian deposits of Haute-Provence further enhances its significance. Collectors of ammonites, students of paleontology, and enthusiasts of natural history alike will appreciate this piece both for its educational importance and its aesthetic appeal.

Every fossil we supply is individually selected for quality, authenticity, and condition. This ammonite offers a rare opportunity to own a certified specimen of an iconic Early Cretaceous species from one of the most important fossil-bearing regions in Europe. It is both a captivating display piece and a valuable addition to any serious fossil collection.