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.
21″ Titanites giganteus – Portland Fossil Ammonite 54kg | Isle of Portland Dorset UK | Genuine Specimen COA
£2,400.00
Rare 21″ Titanites giganteus Ammonite – Portland Fossil (54kg)
Species:Titanites giganteus
Type: Fossil Ammonite
Size: Approx. 21″ diameter (Scale Rule Squares/Cube = 1cm – see photos for full measurements)
Weight: 54kg
Age: Late Jurassic – Tithonian Stage (Upper Jurassic transitioning to Cretaceous)
Location: Isle of Portland, Dorset, UK
Formation: Portland Stone
This is a stunning and massive example of Titanites giganteus, one of the largest known ammonites from the Tithonian. The specimen was discovered in the world-famous fossil beds of the Isle of Portland, Dorset, part of the Jurassic Coast UNESCO World Heritage Site.
Each fossil we sell is a 100% genuine specimen and comes with a Certificate of Authenticity (COA). The photos show the actual fossil you will receive – carefully selected for its preservation and geological significance.
Geological & Scientific Details
Geological Stage: Tithonian (Upper Jurassic)
Depositional Environment: Shallow marine carbonate platform – warm, low-energy lagoonal to subtidal conditions associated with the Portland Stone Formation.
Order: Ammonitida
Superfamily: Perisphinctoidea
Family: Dorsoplanitidae (Titanites is a member of this family).
Morphology: Gigantic, planispiral shell with relatively simple ribbing and a wide whorl section, characteristic of T. giganteus.
Biozone: Often associated with the Titanites giganteus Biozone, a key Tithonian ammonite zone used in stratigraphy in southern England.
Notable Features
Exceptional size at approx. 21″, making it a museum-quality display piece.
Preserved in iconic grey Portland limestone matrix.
Represents a key index fossil for the Tithonian stage, making it scientifically significant.
Identification
Titanites giganteus was first formally described by Sowerby, 1818, and remains one of the most famous ammonite species of the UK Jurassic Coast.
Additional Information
The fossil is supplied with a Certificate of Authenticity.
Photos include a scale cube (1cm squares) for accurate sizing.
This is the exact specimen you will receive; we do not use stock photos.
(Actual as seen)
Includes a fully hand-signed Premium Certificate of Authenticity.
Rare 21″ Titanites giganteus Ammonite – Portland Fossil (54kg)
Species:Titanites giganteus
Type: Fossil Ammonite
Size: Approx. 21″ diameter (Scale Rule Squares/Cube = 1cm – see photos for full measurements)
Weight: 54kg
Age: Late Jurassic – Tithonian Stage (Upper Jurassic transitioning to Cretaceous)
Location: Isle of Portland, Dorset, UK
Formation: Portland Stone
This is a stunning and massive example of Titanites giganteus, one of the largest known ammonites from the Tithonian. The specimen was discovered in the world-famous fossil beds of the Isle of Portland, Dorset, part of the Jurassic Coast UNESCO World Heritage Site.
Each fossil we sell is a 100% genuine specimen and comes with a Certificate of Authenticity (COA). The photos show the actual fossil you will receive – carefully selected for its preservation and geological significance.
Geological & Scientific Details
Geological Stage: Tithonian (Upper Jurassic)
Depositional Environment: Shallow marine carbonate platform – warm, low-energy lagoonal to subtidal conditions associated with the Portland Stone Formation.
Order: Ammonitida
Superfamily: Perisphinctoidea
Family: Dorsoplanitidae (Titanites is a member of this family).
Morphology: Gigantic, planispiral shell with relatively simple ribbing and a wide whorl section, characteristic of T. giganteus.
Biozone: Often associated with the Titanites giganteus Biozone, a key Tithonian ammonite zone used in stratigraphy in southern England.
Notable Features
Exceptional size at approx. 21″, making it a museum-quality display piece.
Preserved in iconic grey Portland limestone matrix.
Represents a key index fossil for the Tithonian stage, making it scientifically significant.
Identification
Titanites giganteus was first formally described by Sowerby, 1818, and remains one of the most famous ammonite species of the UK Jurassic Coast.
Additional Information
The fossil is supplied with a Certificate of Authenticity.
Photos include a scale cube (1cm squares) for accurate sizing.
This is the exact specimen you will receive; we do not use stock photos.
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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