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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9" Harpoceras Somerset Fossil Ammonite, Beacon Limestone Jurassic, Ilminster UK – Genuine Collector Specimen with COA
9" Harpoceras Somerset Fossil Ammonite, Beacon Limestone Jurassic, Ilminster UK – Genuine Collector Specimen with COA - Image 2

9″ Harpoceras Somerset Fossil Ammonite, Beacon Limestone Jurassic, Ilminster UK – Genuine Collector Specimen with COA

£132.00

Available now is a magnificent 9″ Harpoceras fossil ammonite, found in the Beacon Limestone Formation near Ilminster, Somerset, United Kingdom. This specimen dates to the Lower Jurassic Period, specifically the Toarcian Stage, and showcases the elegant structure and detail for which Harpoceras is renowned.

Taxonomic Classification:

  • Genus: Harpoceras
  • Order: Ammonitida
  • Superfamily: Hildoceratoidea
  • Family: Hildoceratidae
  • First described by Waagen in 1869, Harpoceras is a key ammonite genus in Toarcian biostratigraphy

Geological & Stratigraphic Context:

  • Formation: Beacon Limestone
  • Stage: Lower Toarcian (Early Jurassic)
  • Biozone: Often associated with the Harpoceras serpentinum Zone
  • Age: ~183 to 180 million years ago
  • Locality: Ilminster, Somerset, UK
  • Depositional Environment: Warm, shallow marine setting with low-energy carbonate sedimentation ideal for fossil preservation

Morphological Features:

  • Involute coiling with narrow umbilicus
  • Flattened whorls and a prominent, well-developed venter keel
  • Fine sinuous ribbing, sweeping from the umbilical edge to the outer shell edge
  • Shell structure indicative of nektonic (free-swimming) life habits
  • May display preserved growth lines and intricate suture patterns

Scientific & Collector Significance:

  • Harpoceras is a classic marker genus for Lower Jurassic stratigraphy and marine paleoecology
  • The species provides important insights into ammonite evolution during the early phases of the Jurassic
  • The Ilminster Beacon Limestone is one of the most iconic fossil beds in the UK, celebrated for both abundance and quality of ammonite preservation

This listing includes images of the actual specimen you will receive, with a 1cm square cube for scale reference. The fossil has been carefully selected and prepared to highlight its natural detail and beauty.

Authenticity Guaranteed: This is a 100% genuine fossil ammonite, and it comes with a Certificate of Authenticity. Perfect for fossil collectors, geology enthusiasts, educators, or as a striking natural history display piece.

Please see all photos for condition and full sizing details. A rare opportunity to acquire a beautifully preserved 9-inch Harpoceras ammonite from one of Britain’s most important Jurassic fossil sites.

(Actual as seen)

Only 1 left in stock

SKU: UF3865 Category:

Description

Available now is a magnificent 9″ Harpoceras fossil ammonite, found in the Beacon Limestone Formation near Ilminster, Somerset, United Kingdom. This specimen dates to the Lower Jurassic Period, specifically the Toarcian Stage, and showcases the elegant structure and detail for which Harpoceras is renowned.

Taxonomic Classification:

  • Genus: Harpoceras
  • Order: Ammonitida
  • Superfamily: Hildoceratoidea
  • Family: Hildoceratidae
  • First described by Waagen in 1869, Harpoceras is a key ammonite genus in Toarcian biostratigraphy

Geological & Stratigraphic Context:

  • Formation: Beacon Limestone
  • Stage: Lower Toarcian (Early Jurassic)
  • Biozone: Often associated with the Harpoceras serpentinum Zone
  • Age: ~183 to 180 million years ago
  • Locality: Ilminster, Somerset, UK
  • Depositional Environment: Warm, shallow marine setting with low-energy carbonate sedimentation ideal for fossil preservation

Morphological Features:

  • Involute coiling with narrow umbilicus
  • Flattened whorls and a prominent, well-developed venter keel
  • Fine sinuous ribbing, sweeping from the umbilical edge to the outer shell edge
  • Shell structure indicative of nektonic (free-swimming) life habits
  • May display preserved growth lines and intricate suture patterns

Scientific & Collector Significance:

  • Harpoceras is a classic marker genus for Lower Jurassic stratigraphy and marine paleoecology
  • The species provides important insights into ammonite evolution during the early phases of the Jurassic
  • The Ilminster Beacon Limestone is one of the most iconic fossil beds in the UK, celebrated for both abundance and quality of ammonite preservation

This listing includes images of the actual specimen you will receive, with a 1cm square cube for scale reference. The fossil has been carefully selected and prepared to highlight its natural detail and beauty.

Authenticity Guaranteed: This is a 100% genuine fossil ammonite, and it comes with a Certificate of Authenticity. Perfect for fossil collectors, geology enthusiasts, educators, or as a striking natural history display piece.

Please see all photos for condition and full sizing details. A rare opportunity to acquire a beautifully preserved 9-inch Harpoceras ammonite from one of Britain’s most important Jurassic fossil sites.

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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