Rare Pseudoschloenbachia casterasi Fossil Ammonite Santonian Cretaceous France

Description

Genuine Pseudoschloenbachia Fossil Ammonite – A Rare Santonian Treasure

This listing is for a rare Pseudoschloenbachia (Pseudoschloenbachia) casterasi ammonite fossil from the Santonian Stage of the Late Cretaceous, discovered in the famous fossil-bearing beds of Charente, France. Each fossil is a 100% genuine specimen, carefully selected for its preservation, and is supplied with a Certificate of Authenticity. The photographs provided show the actual specimen you will receive, including scale cube markers (1 cm squares) to give you precise sizing reference.

Geological Age and Provenance

The fossil originates from the Santonian Stage (approximately 86.3 to 83.6 million years ago) of the Upper Cretaceous period. During this time, Europe was largely submerged beneath warm epicontinental seas, which provided an ideal marine environment for ammonites to thrive. The Charente region of France is highly regarded for its Santonian fossil deposits, yielding specimens of remarkable scientific and collector value.

Scientific Classification

• Kingdom: Animalia
• Phylum: Mollusca
• Class: Cephalopoda
• Order: Ammonitida
• Superfamily: Desmoceratoidea
• Family: Schloenbachiidae
• Genus: Pseudoschloenbachia
• Species: Pseudoschloenbachia casterasi

This species was first formally described by the French paleontologist Jean Casteras in the early 20th century, and it remains an important biostratigraphic marker for the Santonian.

Morphological Features

Specimens of Pseudoschloenbachia casterasi are distinguished by their moderately involute shells with strong ribbing, which often become more pronounced toward the outer whorls. The ribs may bifurcate or intercalate, adding to the visual complexity of the shell. Many individuals display a slightly compressed whorl section with a rounded venter. These traits make the species a fascinating example of evolutionary adaptation in Late Cretaceous ammonites, particularly within the Schloenbachiidae family.

Paleoenvironment and Significance

Ammonites such as Pseudoschloenbachia thrived in shallow marine environments that were rich in plankton and small invertebrates, which formed their primary food source. Their widespread presence and relatively rapid evolutionary turnover make them excellent index fossils. Pseudoschloenbachia casterasi, in particular, is a key indicator for Santonian-age deposits, helping paleontologists to precisely date and correlate rock strata across Europe and beyond.

Collecting and Display

This fossil represents not only a piece of Earth’s deep history but also a scientifically important specimen. Its rarity and defined features make it a prized acquisition for serious fossil collectors, geology enthusiasts, and educational institutions alike. Whether displayed in a private collection or used as a teaching aid, the fossil captures both the beauty of natural history and the value of scientific heritage.

Why Choose This Specimen?

• Rare and authentic Santonian ammonite from Charente, France.
• Scientifically significant species with strong biostratigraphic value.
• Distinct morphological detail, showcasing natural ribbing and shell form.
• Comes with a Certificate of Authenticity for guaranteed provenance.
• Ideal for collectors, educators, or as a unique natural history gift.

This Pseudoschloenbachia casterasi ammonite offers a rare opportunity to own a genuine fossil from the Late Cretaceous seas of France, beautifully preserved and ready to be added to your collection.