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 - Save up to 60%

RARE Fossil Ammonite TETRASPIDOCERAS QUADARMATUM – Upper Sinemurian, Jurassic: Radstock, UK – Alice Purnell Collection – Certified Specimen
RARE Fossil Ammonite TETRASPIDOCERAS QUADARMATUM – Upper Sinemurian, Jurassic: Radstock, UK – Alice Purnell Collection – Certified Specimen - Image 2

RARE Fossil Ammonite TETRASPIDOCERAS QUADARMATUM – Upper Sinemurian, Jurassic: Radstock, UK – Alice Purnell Collection – Certified Specimen

£120.00

Presenting a RARE and scientifically valuable fossil ammonite specimen: Tetraspidoceras quadarmatum, from the Upper Sinemurian stage of the Early Jurassic, discovered at Radstock, United Kingdom. This exceptional piece originates from the well-respected Alice Purnell Collection, recognised for its accurately identified and excellently preserved fossil specimens.

Tetraspidoceras quadarmatum belongs to the family Oxynoticeratidae within the superfamily Psiloceratoidea and order Ammonitida. It is known for its ribbed shell morphology and may feature subtle tubercles on the flanks, typical of the genus. The shell is generally involute with compressed whorls.

Geological & Scientific Details:

  • Scientific Name: Tetraspidoceras quadarmatum
  • Fossil Type: Ammonite (involute planispiral shell)
  • Geological Period: Jurassic
  • Stage: Upper Sinemurian (~197–190 million years ago)
  • Zone: Obtusum to Raricostatum Zones (associated with the genus)
  • Location Found: Radstock, Somerset, United Kingdom
  • Order: Ammonitida
  • Superfamily: Psiloceratoidea
  • Family: Oxynoticeratidae
  • Morphological Features: Involute coiling, strong primary ribs, possible tubercles or nodes on the flanks, compressed whorl section
  • Depositional Environment: Shallow marine, typically offshore siliciclastic settings with siltstone and marl sedimentation during highstand conditions

Tetraspidoceras species are important biostratigraphic markers for the Sinemurian and provide valuable insights into early ammonite diversification in the aftermath of the end-Triassic extinction.

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

Please Note:

  • Scale Rule Squares / Cube = 1cm – full sizing is visible in the photo
  • The fossil pictured is the exact specimen you will receive
  • From the Alice Purnell Collection – a premium selection for collectors and scholars

A rare ammonite fossil ideal for display, educational use, or enhancing a curated palaeontological collection.

(Actual as seen)

Out of stock

SKU: AF1201 Category:

Description

Presenting a RARE and scientifically valuable fossil ammonite specimen: Tetraspidoceras quadarmatum, from the Upper Sinemurian stage of the Early Jurassic, discovered at Radstock, United Kingdom. This exceptional piece originates from the well-respected Alice Purnell Collection, recognised for its accurately identified and excellently preserved fossil specimens.

Tetraspidoceras quadarmatum belongs to the family Oxynoticeratidae within the superfamily Psiloceratoidea and order Ammonitida. It is known for its ribbed shell morphology and may feature subtle tubercles on the flanks, typical of the genus. The shell is generally involute with compressed whorls.

Geological & Scientific Details:

  • Scientific Name: Tetraspidoceras quadarmatum
  • Fossil Type: Ammonite (involute planispiral shell)
  • Geological Period: Jurassic
  • Stage: Upper Sinemurian (~197–190 million years ago)
  • Zone: Obtusum to Raricostatum Zones (associated with the genus)
  • Location Found: Radstock, Somerset, United Kingdom
  • Order: Ammonitida
  • Superfamily: Psiloceratoidea
  • Family: Oxynoticeratidae
  • Morphological Features: Involute coiling, strong primary ribs, possible tubercles or nodes on the flanks, compressed whorl section
  • Depositional Environment: Shallow marine, typically offshore siliciclastic settings with siltstone and marl sedimentation during highstand conditions

Tetraspidoceras species are important biostratigraphic markers for the Sinemurian and provide valuable insights into early ammonite diversification in the aftermath of the end-Triassic extinction.

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

Please Note:

  • Scale Rule Squares / Cube = 1cm – full sizing is visible in the photo
  • The fossil pictured is the exact specimen you will receive
  • From the Alice Purnell Collection – a premium selection for collectors and scholars

A rare ammonite fossil ideal for display, educational use, or enhancing a curated palaeontological collection.

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.

Reviews

There are no reviews yet.

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

Related products