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 Garantiana densicostata Fossil Ammonite – Upper Bajocian, Jurassic, Eurecy Calvados France – Genuine + COA
£24.00
A rare and finely preserved Garantiana densicostata Fossil Ammonite, from the Upper Bajocian Stage of the Jurassic Period, discovered near Eurecy, Calvados, Normandy, France. This ammonite displays classic features of the genus Garantiana, with tightly packed ribbing and well-preserved details. The exact specimen shown in the photo is the one you will receive and includes a Certificate of Authenticity.
Fossil Type & Species:
Type: Ammonite (extinct marine cephalopod)
Species:Garantiana densicostata
Order: Ammonitida
Superfamily: Stephanoceratoidea
Family: Stephanoceratidae
Geological Context:
Period: Jurassic
Epoch/Stage: Middle Jurassic – Upper Bajocian (approx. 170.3 to 168.3 million years ago)
Biozone:Garantiana Zone – a key ammonite biozone used for Middle Jurassic biostratigraphy across NW Europe
Depositional Environment: Shallow marine platform with fine calcareous muds and marls – ideal for ammonite preservation
Locality:
Region: Eurecy, Calvados, Normandy, France
Formation: Likely from Bajocian limestone and marl units of the Paris Basin sequence (exact formation unconfirmed)
Morphology & Features:
Tightly coiled evolute shell with a wide umbilicus
Very dense, fine ribbing characteristic of densicostata species
Ribs bifurcate low on the flanks and continue smoothly across the venter
Rounded whorl section and consistent rib patterning
Scientific Notes:
Garantiana densicostata was first described in the 19th century and is a key faunal indicator for high-resolution stratigraphic studies
Often used in correlating Middle Jurassic sequences across France, England, and Germany
Notable Details:
A rare and visually striking ammonite specimen
Natural and unrestored; professionally cleaned and prepped
Scale Reference: Each square or cube in the image = 1cm. Please refer to the image for precise measurements
Authenticity & Guarantee: All of our fossils are 100% genuine, responsibly sourced, and come with a Certificate of Authenticity. The fossil shown is the exact one you will receive.
This rare Garantiana densicostata ammonite is ideal for collectors, educators, or anyone interested in Jurassic palaeontology. A striking piece of natural history from the marine ecosystems of ancient Normandy.
A rare and finely preserved Garantiana densicostata Fossil Ammonite, from the Upper Bajocian Stage of the Jurassic Period, discovered near Eurecy, Calvados, Normandy, France. This ammonite displays classic features of the genus Garantiana, with tightly packed ribbing and well-preserved details. The exact specimen shown in the photo is the one you will receive and includes a Certificate of Authenticity.
Fossil Type & Species:
Type: Ammonite (extinct marine cephalopod)
Species:Garantiana densicostata
Order: Ammonitida
Superfamily: Stephanoceratoidea
Family: Stephanoceratidae
Geological Context:
Period: Jurassic
Epoch/Stage: Middle Jurassic – Upper Bajocian (approx. 170.3 to 168.3 million years ago)
Biozone:Garantiana Zone – a key ammonite biozone used for Middle Jurassic biostratigraphy across NW Europe
Depositional Environment: Shallow marine platform with fine calcareous muds and marls – ideal for ammonite preservation
Locality:
Region: Eurecy, Calvados, Normandy, France
Formation: Likely from Bajocian limestone and marl units of the Paris Basin sequence (exact formation unconfirmed)
Morphology & Features:
Tightly coiled evolute shell with a wide umbilicus
Very dense, fine ribbing characteristic of densicostata species
Ribs bifurcate low on the flanks and continue smoothly across the venter
Rounded whorl section and consistent rib patterning
Scientific Notes:
Garantiana densicostata was first described in the 19th century and is a key faunal indicator for high-resolution stratigraphic studies
Often used in correlating Middle Jurassic sequences across France, England, and Germany
Notable Details:
A rare and visually striking ammonite specimen
Natural and unrestored; professionally cleaned and prepped
Scale Reference: Each square or cube in the image = 1cm. Please refer to the image for precise measurements
Authenticity & Guarantee: All of our fossils are 100% genuine, responsibly sourced, and come with a Certificate of Authenticity. The fossil shown is the exact one you will receive.
This rare Garantiana densicostata ammonite is ideal for collectors, educators, or anyone interested in Jurassic palaeontology. A striking piece of natural history from the marine ecosystems of ancient Normandy.
Additional information
Era
Jurassic
Origin
France
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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