RARE Fagesia superstes Fossil Chalk Ammonite | Lower Turonian Cretaceous | Soria Burgos Spain | Alice Purnell Collection

Description

This listing is for a RARE Chalk Fossil Ammonite of the species Fagesia superstes, from the Lower Turonian Stage of the Cretaceous Period, discovered in the renowned fossiliferous chalk deposits of Soria-Burgos, Spain. This exceptional specimen originates from the prestigious Alice Purnell Collection, known for its high-quality and scientifically significant finds.

Geological Details:

• Formation/Deposit: Fossiliferous marine chalk beds of the Soria-Burgos region
• Geological Period: Cretaceous
• Geological Stage: Lower Turonian (~93.9 to 89.8 million years ago)
• Depositional Environment: Offshore, calm marine shelf with fine carbonate sedimentation, rich in plankton and cephalopods

Paleontological Context: Fagesia superstes is a heteromorph ammonite within the Family Acanthoceratidae, characterized by its compressed, involute shell and fine ribbing. It is relatively rare and found primarily in Turonian chalks of Europe, often preserved in white to cream-coloured matrix.

• Order: Ammonitida
• Superfamily: Acanthoceratoidea
• Family: Acanthoceratidae
• Genus: Fagesia
• Species: superstes
• Zone/Biozone: Associated with the Lower Turonian Mammites nodosoides Zone, a marker for early Turonian ammonite succession
• Formally Described by: Pervinquière, 1907

Morphological Features:

• Slightly involute, compressed shell
• Fine, sinuous ribbing across whorls
• Smooth venter (outer rim)
• Subtle tuberculation in some specimens
• White to pale matrix characteristic of Spanish chalk beds

Notable Characteristics:

• Rare locality-specific species not commonly available on the fossil market
• From the well-documented Alice Purnell Collection, ensuring traceable provenance
• Excellent preservation, showcasing key diagnostic features

Authenticity & Presentation:

• 100% genuine fossil, not a replica or composite
• Certificate of Authenticity included
• Exact specimen photographed – the one you will receive
• Scale cube = 1cm for accurate size reference in photos

Additional Notes: This is a scientifically valuable and display-worthy specimen ideal for advanced collectors, academic reference, or a centrepiece in a curated collection. The preservation in soft chalk, combined with the rarity of the species and origin from a respected collection, makes this an extraordinary opportunity.

All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity.