Description
Loligosepia bucklandi Fossil Cuttlefish – Lower Jurassic, Lyme Regis
Presented here is a genuine Loligosepia bucklandi fossil, a rare early cuttlefish-type coleoid cephalopod discovered in the Lower Lias deposits of Lyme Regis, Dorset, England. This specimen originates from the Early Jurassic Period, approximately 201–190 million years ago, when the seas covering southern Britain were home to a diverse range of marine life.
Loligosepia represents one of the earliest known examples of cuttlefish-like cephalopods, belonging to a group of highly intelligent marine invertebrates related to modern cuttlefish, squid, and octopuses. Fossils of this genus are highly sought after due to their rarity and their importance in understanding the evolution of modern cephalopods.
The specimen offered here has been carefully selected for display quality, and the photographs show the exact fossil you will receive. The fossil includes a Certificate of Authenticity lifetime guarantee generic card, confirming that the specimen is genuine.
Full sizing and scale can be seen in the listing photographs.
Loligosepia – An Early Cuttlefish Relative
Loligosepia bucklandi belongs to the subclass Coleoidea, the group that includes modern cuttlefish, squid, and octopuses. These animals differ from ammonites and nautiloids in that their shells were largely internal or greatly reduced.
Taxonomically, Loligosepia is classified as:
• Class: Cephalopoda
• Subclass: Coleoidea
• Order: Sepiida (early relatives of cuttlefish)
• Genus: Loligosepia
• Species: Loligosepia bucklandi
Loligosepia fossils are typically preserved as impressions of the internal shell structure known as a gladius or cuttlebone precursor, along with soft body outlines in exceptional cases.
These animals were likely active swimmers, using jet propulsion in a manner similar to modern cephalopods. Their bodies were elongated, with fins along the mantle and multiple arms equipped with suckers for capturing prey.
Morphology and Fossil Features
Fossils of Loligosepia typically preserve the internal skeletal structure, which supported the mantle of the animal. This structure represents an evolutionary step toward the modern cuttlebone found in living cuttlefish.
Typical morphological features include:
• Elongated internal shell structure
• Distinct central axis or gladius-like element
• Thin laminar mineralisation preserved within shale or marl
• Occasionally preserved mantle outlines or associated soft tissue impressions
These fossils provide critical evidence for the early evolution of internal shells within coleoid cephalopods, marking an important transition from externally shelled ancestors to the modern squid and cuttlefish body plan.
Lower Lias Geological Formation
The fossil originates from the Lower Lias Group, a famous sequence of Early Jurassic marine sedimentary rocks exposed along the Dorset coast.
The Lower Lias was deposited during the Hettangian and Sinemurian stages of the Early Jurassic, approximately 201–190 million years ago.
At this time, southern Britain lay beneath a warm shallow epicontinental sea connected to the Tethys Ocean. Fine marine sediments accumulated on the seabed, forming layers of mudstone, marl, and shale that are now exposed along the Jurassic Coast.
These sediments preserve a rich fossil assemblage including:
• Ammonites used for precise stratigraphic dating
• Marine reptiles such as ichthyosaurs and plesiosaurs
• Sharks and bony fish
• Belemnites and other cephalopods
• Crustaceans and marine invertebrates
The abundance of ammonites allows the Lower Lias to be subdivided into detailed ammonite biozones, which enable highly accurate dating of fossil-bearing strata.
Lyme Regis – Historic Fossil Locality
Lyme Regis is one of the most important fossil localities in the world and forms part of the Jurassic Coast UNESCO World Heritage Site.
The cliffs surrounding Lyme Regis have produced countless scientifically significant fossils, including many marine reptiles and cephalopods. The area gained worldwide fame through the discoveries of pioneering fossil collector Mary Anning in the early nineteenth century.
Ongoing coastal erosion continues to expose fossil-bearing layers within the Lower Lias, making Lyme Regis one of the most productive Jurassic fossil sites in Europe.
Loligosepia fossils are uncommon finds, making specimens such as this particularly desirable among collectors of Jurassic cephalopods.
Fossilisation and Preservation
Soft-bodied animals such as cephalopods rarely fossilise because most of their anatomy is composed of soft tissue. However, internal shell structures such as the gladius or cuttlebone precursor were more resistant to decay and could become preserved within fine marine sediments.
When these animals died, their remains settled onto the sea floor where they became buried in oxygen-poor muds. Over millions of years, mineralisation preserved the internal structures within the surrounding rock.
The Lower Lias sediments are particularly well known for preserving delicate cephalopod fossils due to their fine-grained depositional environment.
Authenticity and Collector Information
• Genuine fossil specimen – not a cast or replica
• Fossil Type: Loligosepia bucklandi Fossil Cuttlefish
• Class: Cephalopoda
• Subclass: Coleoidea
• Order: Sepiida (early cuttlefish relatives)
• Geological Formation: Lower Lias Group
• Age: Lower Jurassic (Hettangian–Sinemurian), approximately 201–190 million years old
• Locality: Lyme Regis, Dorset, United Kingdom
• Includes Certificate of Authenticity lifetime guarantee generic card
• The exact fossil shown in the photographs is the specimen you will receive
This genuine Loligosepia bucklandi fossil from Lyme Regis represents an excellent addition to any Jurassic fossil collection, cephalopod display, or natural history cabinet, preserving an important early example of cuttlefish evolution from the ancient seas of the Early Jurassic.
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