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.

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RARE Spiroceras bifurcati Fossil Heteromorph Ammonite Jurassic Coast Dorset UK COA
RARE Spiroceras bifurcati Fossil Heteromorph Ammonite Jurassic Coast Dorset UK COA - Image 2
RARE Spiroceras bifurcati Fossil Heteromorph Ammonite Jurassic Coast Dorset UK COA - Image 3

RARE Spiroceras bifurcati Fossil Heteromorph Ammonite Jurassic Coast Dorset UK COA

Original price was: £240.00.Current price is: £216.00.

This listing features a VERY RARE fossil specimen of the heteromorph ammonite Spiroceras bifurcati, discovered by our expert field team, Alister and Alison, on 30 April 2025 at Burton Bradstock, along the internationally recognised Jurassic Coast, Dorset, UK.

The fossil originates from the Inferior Oolite Formation, part of the Bajocian Stage of the Middle Jurassic (~170 million years ago). Spiroceras is a highly unusual ammonite genus due to its heteromorph coiling pattern—the shell does not coil in a regular spiral but instead shows a partially uncoiled, irregular or spiral form. This unique morphology makes it an exceptional and highly sought-after specimen.

Scientific and geological context:

  • Order: Ammonitida
  • Superfamily: Stephanoceratoidea
  • Family: Possibly Tulitidae (classification debated)
  • Genus & Species: Spiroceras bifurcati
  • Morphology Features: Bifurcating ribbing, heteromorphic shell with open, loosely coiled whorls
  • Geological Stage: Bajocian
  • Depositional Environment: Shallow marine shelf with oolitic sedimentation typical of the Inferior Oolite

The fossil has been professionally cleaned, prepped, and treated by Alison, preserving its rare and delicate form. The photo provided is of the actual specimen you will receive, and includes a 1cm scale cube for accurate sizing—please refer to the photo for full measurements.

All of our fossils are 100% genuine specimens and come with a Certificate of Authenticity (COA), confirming provenance and scientific identity.

This is a highly collectable and visually striking piece, ideal for fossil enthusiasts, advanced collectors, museums, or educational institutions looking to showcase rare Jurassic marine life.

 

Origin: Burton Bradstock, Dorset, United Kingdom

Formation: Inferior Oolite

Age: Bajocian Stage, Middle Jurassic (~170 Ma)

Species: Spiroceras bifurcati

Discovered by: Alister and Alison (30 April 2025)

Prepared by: Alison

Authenticity: 100% Genuine Fossil with COA

(Actual as seen)

Only 1 left in stock

SKU: CF3121 Category:

Description

This listing features a VERY RARE fossil specimen of the heteromorph ammonite Spiroceras bifurcati, discovered by our expert field team, Alister and Alison, on 30 April 2025 at Burton Bradstock, along the internationally recognised Jurassic Coast, Dorset, UK.

The fossil originates from the Inferior Oolite Formation, part of the Bajocian Stage of the Middle Jurassic (~170 million years ago). Spiroceras is a highly unusual ammonite genus due to its heteromorph coiling pattern—the shell does not coil in a regular spiral but instead shows a partially uncoiled, irregular or spiral form. This unique morphology makes it an exceptional and highly sought-after specimen.

Scientific and geological context:

  • Order: Ammonitida
  • Superfamily: Stephanoceratoidea
  • Family: Possibly Tulitidae (classification debated)
  • Genus & Species: Spiroceras bifurcati
  • Morphology Features: Bifurcating ribbing, heteromorphic shell with open, loosely coiled whorls
  • Geological Stage: Bajocian
  • Depositional Environment: Shallow marine shelf with oolitic sedimentation typical of the Inferior Oolite

The fossil has been professionally cleaned, prepped, and treated by Alison, preserving its rare and delicate form. The photo provided is of the actual specimen you will receive, and includes a 1cm scale cube for accurate sizing—please refer to the photo for full measurements.

All of our fossils are 100% genuine specimens and come with a Certificate of Authenticity (COA), confirming provenance and scientific identity.

This is a highly collectable and visually striking piece, ideal for fossil enthusiasts, advanced collectors, museums, or educational institutions looking to showcase rare Jurassic marine life.

 

Origin: Burton Bradstock, Dorset, United Kingdom

Formation: Inferior Oolite

Age: Bajocian Stage, Middle Jurassic (~170 Ma)

Species: Spiroceras bifurcati

Discovered by: Alister and Alison (30 April 2025)

Prepared by: Alison

Authenticity: 100% Genuine Fossil with COA

Additional information

Era

Jurassic
Origin

United Kingdom

Jurassic Information

The Jurassic Period (201–145 million years ago) was the golden age of dinosaurs, with iconic species like Brachiosaurus, Stegosaurus, and Allosaurus dominating the land. It was a time of warm, humid climates, with high sea levels that created vast shallow seas, supporting abundant marine reptiles, ammonites, and early coral reefs. The first birds, such as Archaeopteryx, evolved from small theropod dinosaurs, while early mammals remained small and nocturnal. Lush forests of cycads, conifers, and ferns covered the land, providing food for giant herbivores. The breakup of the supercontinent Pangaea accelerated, shaping Earth's geography and setting the stage for the diverse ecosystems of the Cretaceous.

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