Fossils for Sale - High-quality BRITISH and WORLDWIDE Fossils. An impressive selection of fossils, including Ammonites, Trilobites, Belemnites, Fossil Fish, Fossil Shark Teeth, Fossilised Insects in Amber, Dinosaurs, and Reptiles. UK Fossils was formed in 1988 and collects and preps our own fossils in the heart of the Jurassic Coast, collecting fossils from Lyme Regis, Charmouth and Somerset. Our passion for fossils is reflected in our carefully curated collection, which includes some of the rarest and most unique specimens available.

FREE UK DELIVERY - LAST XMAS ORDERS 22ND DEC

SALE 10%
Didymoceras nebrascense heteromorph ammonite – upper campanian, cretaceous – south dakota, usa
Didymoceras nebrascense heteromorph ammonite – upper campanian, cretaceous – south dakota, usa - Image 2
Didymoceras nebrascense heteromorph ammonite – upper campanian, cretaceous – south dakota, usa - Image 3
Didymoceras nebrascense heteromorph ammonite – upper campanian, cretaceous – south dakota, usa - Image 4

Didymoceras nebrascense heteromorph ammonite – upper campanian, cretaceous – south dakota, usa

Original price was: £120.00.Current price is: £108.00.

Authentic Didymoceras nebrascense Heteromorph Ammonite – Upper Campanian, Cretaceous – South Dakota, USA

About the Fossil:

This rare and exceptional Didymoceras nebrascense ammonite fossil is from the Upper Campanian stage of the Late Cretaceous period (~75-72 million years ago) and was discovered in South Dakota, USA. Didymoceras is a fascinating example of a heteromorph ammonite, meaning it exhibits an unusual, uncoiled shell structure rather than the typical tightly coiled shape seen in most ammonites.

Heteromorph ammonites like Didymoceras had complex, spiraling, and irregularly coiled shells, which likely played a role in buoyancy control. These cephalopods thrived in ancient marine environments, drifting in the water column as they hunted for small prey. The intricate, almost alien-like shape of their shells makes them one of the most visually striking fossils in the ammonite family.

Geology & Formation:

  • Geological Age: Upper Campanian, Late Cretaceous (~75-72 million years ago)
  • Formation: Marine sedimentary deposits
  • Location: South Dakota, USA
  • Preservation: Exceptional fossilization with well-preserved coiling structure

Why This Fossil?

✔ 100% Genuine Specimen – Comes with a Certificate of Authenticity

✔ Highly Collectible – From the renowned Alice Purnell Collection

✔ Perfect for Display or Study – Ideal for fossil collectors, students, and paleontology enthusiasts

✔ Scale Rule/Cube = 1cm – See photos for full sizing

The fossil in the photo is the exact specimen you will receive!

Secure Packaging & Fast Shipping – Your fossil will be carefully packed for a safe journey!

(Actual as seen)

Only 1 left in stock

SKU: AF1041 Category:

Description

Authentic Didymoceras nebrascense Heteromorph Ammonite – Upper Campanian, Cretaceous – South Dakota, USA

About the Fossil:

This rare and exceptional Didymoceras nebrascense ammonite fossil is from the Upper Campanian stage of the Late Cretaceous period (~75-72 million years ago) and was discovered in South Dakota, USA. Didymoceras is a fascinating example of a heteromorph ammonite, meaning it exhibits an unusual, uncoiled shell structure rather than the typical tightly coiled shape seen in most ammonites.

Heteromorph ammonites like Didymoceras had complex, spiraling, and irregularly coiled shells, which likely played a role in buoyancy control. These cephalopods thrived in ancient marine environments, drifting in the water column as they hunted for small prey. The intricate, almost alien-like shape of their shells makes them one of the most visually striking fossils in the ammonite family.

Geology & Formation:

  • Geological Age: Upper Campanian, Late Cretaceous (~75-72 million years ago)
  • Formation: Marine sedimentary deposits
  • Location: South Dakota, USA
  • Preservation: Exceptional fossilization with well-preserved coiling structure

Why This Fossil?

✔ 100% Genuine Specimen – Comes with a Certificate of Authenticity

✔ Highly Collectible – From the renowned Alice Purnell Collection

✔ Perfect for Display or Study – Ideal for fossil collectors, students, and paleontology enthusiasts

✔ Scale Rule/Cube = 1cm – See photos for full sizing

The fossil in the photo is the exact specimen you will receive!

Secure Packaging & Fast Shipping – Your fossil will be carefully packed for a safe journey!

Additional information

Era

Cretaceous
Origin

USA

Cretaceous Information

The Cretaceous Period (145–66 million years ago) was the final era of the Mesozoic, marked by the dominance of dinosaurs and the rise of flowering plants. It had a warm, greenhouse climate, with high sea levels that created vast shallow inland seas. Marine life flourished, including mosasaurs, ammonites, and rudist reefs, while the land was ruled by iconic dinosaurs like Tyrannosaurus rex, Triceratops, and Spinosaurus. Mammals and birds diversified, and insects thrived. The period ended with the mass extinction event, likely caused by an asteroid impact, wiping out the dinosaurs and paving the way for the rise of mammals in the Cenozoic.

Reviews

There are no reviews yet.

Only logged in customers who have purchased this product may leave a review.

Related products