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.
RARE 4″ Tropidoceras masseanum Fossil Ammonite | Pliensbachian Jurassic | Ilminster Somerset UK | Certified Genuine Specimen
£42.00
A superb and rare 4-inch fossil ammonite: Tropidoceras masseanum from the Pliensbachian Stage of the Early Jurassic, collected from the world-renowned fossil site at Ilminster, Somerset, United Kingdom. This well-preserved specimen is a classic representative of a historically significant genus that reflects the evolution of Jurassic ammonoids in southwest England.
The specimen shown is the exact fossil you will receive, professionally photographed with a 1cm scale cube for full sizing reference. Please see images for complete measurements and condition.
Geological & Palaeontological Information:
Fossil Type: Ammonite
Species:Tropidoceras masseanum (originally described by d’Orbigny)
Geological Period: Jurassic
Stage: Pliensbachian (~190 to 183 million years ago)
Location: Ilminster, Somerset, England, UK
Depositional Environment: Shallow marine shelf with fine silts and claystones forming part of the Lower Lias Group
Order: Ammonitida
Superfamily: Eoderoceratoidea
Family: Polymorphitidae
Biozone (Inferred): Possibly from the Ibex or Davoei ammonite zones, typical of the Pliensbachian succession in Ilminster
Morphological Features:
Strongly ribbed evolute shell with open coiling and visible inner whorls
Distinctive rounded venter, often with slight flattening
Regular bifurcating ribbing across the flanks
Deep umbilicus and classic Lower Jurassic form
Notable Points:
Tropidoceras is a stratigraphically significant genus for Lower Jurassic ammonite zones
Ilminster is a famous collecting site for Pliensbachian ammonites, with exceptional preservation due to fine-grained sedimentary conditions
Specimens of Tropidoceras masseanum are uncommon and highly prized by collectors
Why This Fossil is a Great Investment:
Rare British ammonite species with strong scientific and visual appeal
Well-preserved shell structure and diagnostic features
Comes with a Certificate of Authenticity
100% genuine and ethically sourced fossil
Ideal for fossil collectors, academic use, or natural history displays
A superb and rare 4-inch fossil ammonite: Tropidoceras masseanum from the Pliensbachian Stage of the Early Jurassic, collected from the world-renowned fossil site at Ilminster, Somerset, United Kingdom. This well-preserved specimen is a classic representative of a historically significant genus that reflects the evolution of Jurassic ammonoids in southwest England.
The specimen shown is the exact fossil you will receive, professionally photographed with a 1cm scale cube for full sizing reference. Please see images for complete measurements and condition.
Geological & Palaeontological Information:
Fossil Type: Ammonite
Species:Tropidoceras masseanum (originally described by d’Orbigny)
Geological Period: Jurassic
Stage: Pliensbachian (~190 to 183 million years ago)
Location: Ilminster, Somerset, England, UK
Depositional Environment: Shallow marine shelf with fine silts and claystones forming part of the Lower Lias Group
Order: Ammonitida
Superfamily: Eoderoceratoidea
Family: Polymorphitidae
Biozone (Inferred): Possibly from the Ibex or Davoei ammonite zones, typical of the Pliensbachian succession in Ilminster
Morphological Features:
Strongly ribbed evolute shell with open coiling and visible inner whorls
Distinctive rounded venter, often with slight flattening
Regular bifurcating ribbing across the flanks
Deep umbilicus and classic Lower Jurassic form
Notable Points:
Tropidoceras is a stratigraphically significant genus for Lower Jurassic ammonite zones
Ilminster is a famous collecting site for Pliensbachian ammonites, with exceptional preservation due to fine-grained sedimentary conditions
Specimens of Tropidoceras masseanum are uncommon and highly prized by collectors
Why This Fossil is a Great Investment:
Rare British ammonite species with strong scientific and visual appeal
Well-preserved shell structure and diagnostic features
Comes with a Certificate of Authenticity
100% genuine and ethically sourced fossil
Ideal for fossil collectors, academic use, or natural history displays
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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