Rare Pseudocalycoceras Newboldiceras vergense Fossil Ammonite Middle Cenomanian Cretaceous Sussex UK Genuine Certified Collector Specimen

Description

Rare Pseudocalycoceras (Newboldiceras) vergense Fossil Ammonite from Sussex, United Kingdom

This exceptional Pseudocalycoceras (Newboldiceras) vergense fossil ammonite is a superbly preserved and scientifically significant specimen from the Middle Cenomanian stage of the Late Cretaceous, discovered in the fossil-rich deposits of Sussex, UK. Measuring approximately 6 inches, this ammonite combines striking aesthetic qualities with historical and geological importance, making it an ideal centrepiece for any fossil collection. The photographs provided show the actual specimen you will receive.

Geological Context and Formation

The Middle Cenomanian stage, dating to approximately 100.5–93.9 million years ago, was a time when warm, shallow epicontinental seas covered much of southern England. The Sussex deposits from this period consist largely of chalk and marl, laid down in a stable, low-energy marine environment that favoured the exceptional preservation of marine life. These deposits are part of the globally recognised Cenomanian strata that have been invaluable for biostratigraphic correlation and paleontological research.

Scientific Classification

• Species: Pseudocalycoceras (Newboldiceras) vergense
• Family: Acanthoceratidae
• Superfamily: Acanthoceratoidea
• Order: Ammonitida
• Geological Stage: Middle Cenomanian, Late Cretaceous

This species is a well-documented zonal ammonite, used extensively in biostratigraphy to date Cenomanian-aged strata across Europe and other regions, making it both a collector’s item and a key reference fossil in geological studies.

Morphological Characteristics

The shell of Pseudocalycoceras (Newboldiceras) vergense is notable for its:

• Strong, regular ribbing that runs uninterrupted across the whorls, giving the shell a bold and distinctive appearance.
• Prominent tubercles and nodal structures situated along the ribbing, which are diagnostic features of this genus.
• Moderately involute form with a slightly compressed whorl section, creating a balanced, proportionate profile.
• Fine preservation of suture patterns, displaying the intricate folding of the shell walls that supported the animal’s buoyancy control.

The well-defined ornamentation and symmetry make this specimen particularly attractive for display purposes.

Paleoecology and Ancient Seas

As a nektonic marine predator, Pseudocalycoceras (Newboldiceras) vergense belonged to the same subclass as modern squids and cuttlefish. It would have inhabited the upper to mid-water column, preying on small fish, crustaceans, and plankton. These ammonites were an important component of the Cretaceous marine ecosystem, forming part of a diverse food web that included marine reptiles, predatory fish, and other cephalopods.

Following death, the shells of these animals settled onto the seabed, where they were buried in fine marine sediments. Over millions of years, mineral replacement preserved the shells in remarkable detail, allowing modern collectors to appreciate their beauty and scientific value.

Collector Value and Authenticity

This fossil represents a fine example of the species, combining rarity, excellent preservation, and a well-documented provenance from one of the UK’s most famous Cretaceous fossil localities. Its combination of aesthetic appeal and scientific significance ensures it will be highly prized by both seasoned collectors and those new to fossil collecting.

All of our fossils are 100% genuine specimens and come with a Certificate of Authenticity, guaranteeing accurate identification and responsible sourcing. This ensures your investment is both authentic and of lasting value, making this ammonite a worthy addition to any serious collection.