Fossil Ammonite Holcophylloceras Genuine Cretaceous Aptian France Authentic Specimen

Description

Genuine Fossil Ammonite – Holcophylloceras

This listing is for a striking Fossil Ammonite of the genus Holcophylloceras, dating to the Aptian stage of the Early Cretaceous Period, discovered at Auggusac, Tarn, France. At approximately 125–113 million years old, this ammonite fossil represents a rare and scientifically important specimen from a classic French locality. It has been carefully chosen for its preservation and detail, offering both collectors and enthusiasts the opportunity to own a genuine piece of prehistoric marine life.

The Genus – Holcophylloceras

Holcophylloceras belongs to the Order Ammonitida, Superfamily Phyllocerataceae, and Family Phylloceratidae. Ammonites within this group are characterised by their smooth to faintly ornamented shells, with complex, finely divided sutures that are hallmarks of the phylloceratid lineage. Unlike heavily ribbed or spined ammonites, Holcophylloceras is recognised for its more streamlined and elegant morphology. This genus is particularly significant for understanding the evolutionary transition of ammonites during the Early Cretaceous, as they reflect adaptations to deep marine environments.

Geological Context – Aptian Stage, Cretaceous Period

The fossil comes from the Aptian stage of the Early Cretaceous, a geological interval dating between 125 and 113 million years ago. During this time, the region of modern-day southern France was part of the northern margin of the Tethys Ocean. Warm, nutrient-rich waters supported diverse marine life, and fine sediments accumulated on the seabed, creating ideal conditions for fossil preservation. The locality of Auggusac, Tarn is particularly well known for yielding high-quality ammonite fossils, making this specimen part of an important paleontological heritage.

Morphological Features

This Holcophylloceras ammonite exhibits the defining traits of the genus:

• Planispiral shell form with tightly coiled, symmetrical whorls.
• Smooth to lightly ornamented surface, reflecting adaptations for life in deeper marine settings.
• Complex phylloceratid suture lines, beautifully preserved and visible on the fossil, showing the intricate folding of shell partitions.
• Robust and elegant whorl cross-section, giving the shell its characteristic rounded appearance.

The fossil has been photographed with a 1 cm scale cube to provide accurate sizing. The specimen shown in the images is the exact fossil you will receive, chosen for its clarity and geological significance.

Scientific Significance

Ammonites such as Holcophylloceras are highly significant to paleontology as they represent a major lineage of Phylloceratidae, which played an important role in Early Cretaceous ammonite diversity. They are also considered useful for biostratigraphy, helping geologists to date and correlate Aptian rock layers across Europe and beyond. Their unique shell morphology and suture complexity make them valuable for both scientific study and private collections.

Provenance and Authenticity

• Genus: Holcophylloceras
• Age: Aptian, Early Cretaceous (~125–113 million years old)
• Locality: Auggusac, Tarn, France
• Family: Phylloceratidae
• Order: Ammonitida

All of our fossils are guaranteed 100% genuine specimens and are supplied with a Certificate of Authenticity.

Why Add This Fossil to Your Collection?

• A rare and scientifically important ammonite from the Aptian stage of the Cretaceous.
• Well-preserved features including complex sutures and elegant coiling.
• From a classic French locality known for high-quality ammonite specimens.
• Supplied with a Certificate of Authenticity, guaranteeing its authenticity and provenance.

This Holcophylloceras ammonite fossil is a remarkable piece of natural history, combining geological importance, scientific value, and timeless beauty. It is an exceptional addition to any collection of fossils or natural history specimens.