Description
Genuine Dactylioceras Fossil Ammonite from Port Mulgrave, Yorkshire
An authentic Dactylioceras fossil ammonite recovered from the famous Upper Toarcian Jurassic deposits of Port Mulgrave, North Yorkshire, United Kingdom. This remarkable marine fossil dates to approximately 175–180 million years ago and represents one of the most iconic ammonite genera found along the Yorkshire coast.
This fossil is a genuine specimen and includes a Certificate of Authenticity lifetime guarantee generic card. The photographs show the exact specimen you will receive. Full sizing please see photo.
Your specimen was discovered by our own team members, Alister and Alison, and has been professionally cleaned, prepped and treated by Alison to preserve the natural shell detail and overall integrity of the fossil.
About Dactylioceras
Dactylioceras is an extinct genus of ammonite belonging to the Order Ammonitida and Family Dactylioceratidae. These fast-swimming marine cephalopods thrived during the Early Jurassic and are especially abundant within the Toarcian deposits of northern England.
Ammonites were closely related to modern squid, octopus and nautilus, inhabiting ancient seas as active predators and scavengers. Dactylioceras is particularly recognised for its beautifully ribbed shell, tightly coiled whorls and distinctive evolutionary importance within Jurassic stratigraphy.
The shell morphology typically displays strong bifurcating ribs extending across the whorls, creating the classic appearance highly prized by fossil collectors. These ornate rib patterns not only strengthened the shell structure but also make Dactylioceras one of the most visually attractive British ammonites.
Due to their rapid evolution and widespread distribution, species of Dactylioceras are important index fossils used by geologists for identifying and correlating Jurassic rock layers throughout Europe.
Geological Age and Upper Toarcian Environment
This specimen originates from the Upper Toarcian stage of the Early Jurassic, preserved within the famous marine shales and mudstones exposed at Port Mulgrave near Whitby, North Yorkshire.
During the Jurassic period, much of Britain was submerged beneath a warm shallow sea rich in marine life. The seabed environment at the time was dominated by fine oxygen-poor sediments that created ideal conditions for preserving delicate shells and marine organisms.
The Whitby Mudstone Formation and associated Toarcian deposits are internationally renowned for producing exceptional fossils including ammonites, belemnites, marine reptiles and fossil wood. Port Mulgrave remains one of the finest British localities for collecting Jurassic ammonites.
The Toarcian interval is also scientifically important due to major marine environmental events recorded within the sedimentary sequence, making fossils from this horizon particularly significant to palaeontologists and geologists.
Fossil Preservation and Preparation
This genuine Dactylioceras ammonite has been carefully prepared to reveal the natural shell ornamentation while preserving the surrounding matrix and overall fossil integrity. The specimen may display detailed ribbing, natural mineralisation and original shell morphology characteristic of Jurassic ammonites from Yorkshire.
Each fossil from Port Mulgrave is unique, with natural variations in preservation, colouration and matrix composition formed over millions of years through fossilisation processes.
No replicas or casts are involved. The fossil shown in the photographs is the exact specimen you will receive.
The professional preparation by Alison ensures the fossil remains stable and suitable for long-term display, study and collecting.
A Classic Whitby Jurassic Fossil
Yorkshire ammonites are among the most sought-after British fossils due to their exceptional preservation and historic significance. Fossils from Whitby and Port Mulgrave have been collected and studied for centuries and continue to attract fossil enthusiasts worldwide.
This specimen is ideal for:
- Fossil collectors
- Ammonite collections
- Jurassic fossil collections
- Whitby fossil collections
- Marine fossil enthusiasts
- Educational displays
- Geological study collections
- Natural history collections
The elegant shell structure and recognisable rib patterns make Dactylioceras one of the most collectable ammonites from the British Jurassic.
Certificate of Authenticity Included
All of our fossils are guaranteed 100% genuine specimens and include a Certificate of Authenticity lifetime guarantee generic card. We personally recover many of our fossils from UK localities and professionally prepare them in-house to ensure authenticity and quality.
The fossil photographed is the exact specimen you will receive, making this a unique and genuine piece of Jurassic marine history from the famous fossil-bearing deposits of Port Mulgrave, North Yorkshire, England.
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