Rare Notorynchus primigenius Shark Tooth Fossil Pliocene Netherlands Oosterhout Formation Genuine Specimen Mill North Brabant

Description

Rare Notorynchus primigenius Shark Tooth Fossil from the Netherlands

This exceptional Notorynchus primigenius shark tooth fossil originates from the Oosterhout Formation, Pliocene deposits at Mill in North Brabant, Netherlands. Fossils from this formation represent marine ecosystems that existed millions of years ago when much of the region was covered by shallow coastal seas connected to the ancient North Sea Basin.

This specimen represents a fossil tooth from the extinct sevengill shark Notorynchus primigenius, an ancient relative of the modern broadnose sevengill shark. The tooth displays the distinctive multi-cusped morphology characteristic of this lineage and has been preserved through natural fossilisation over millions of years.

The photograph shows the exact specimen you will receive, making this a carefully selected fossil suitable for collectors of shark fossils, palaeontological displays, or educational collections.

Full sizing can be seen in the accompanying photographs.

The fossil includes a Certificate of Authenticity lifetime guarantee card, confirming that the specimen is a genuine natural fossil.

The Ancient Sevengill Shark Notorynchus primigenius

Notorynchus primigenius is an extinct member of the Hexanchidae family, a group of primitive sharks known as cow sharks or sevengill sharks. These sharks are considered among the most ancient lineages of modern sharks and retain several primitive anatomical characteristics.

Scientific classification includes:

• Order: Hexanchiformes
• Family: Hexanchidae
• Genus: Notorynchus
• Species: Notorynchus primigenius

This fossil species represents an ancestral form related to the modern Notorynchus cepedianus, which still inhabits temperate and coastal waters today. Members of this family are easily recognised by their unusual seven gill slits, compared with the five gill slits found in most modern sharks.

The fossil species Notorynchus primigenius was first formally described by the Swiss naturalist Louis Agassiz, one of the most influential early palaeontologists who pioneered the scientific study of fossil fishes during the 19th century.

Distinctive Tooth Morphology

The teeth of Notorynchus primigenius have a very distinctive shape that reflects the shark’s feeding strategy.

Key features of these teeth include:

• Asymmetrical crown shape
• Prominent main cusp
• Several smaller accessory cusplets along the cutting edge
• Smooth enamel surface
• Broad root structure designed for secure jaw attachment

Unlike the triangular slicing teeth of many predatory sharks, these teeth are adapted for gripping and tearing prey. Sevengill sharks are opportunistic predators known to feed on fish, rays, smaller sharks, and marine mammals.

The variation in tooth shape between the upper and lower jaws is an example of heterodont dentition, a common adaptation in many shark species.

Because sharks constantly replace their teeth throughout their lives, fossil teeth such as this are among the most commonly preserved remains of ancient sharks.

Geological Formation and Age

This fossil was discovered in the Oosterhout Formation, an important marine geological unit found in the southern Netherlands.

Geological details include:

• Formation: Oosterhout Formation
• Epoch: Pliocene
• Age: Approximately 5.3 to 2.6 million years old
• Locality: Mill, North Brabant, Netherlands

During the Pliocene Epoch, the region that is now the Netherlands formed part of a shallow marine environment connected to the North Sea Basin. Warm coastal waters supported a diverse marine fauna including sharks, rays, marine mammals, fish, and numerous invertebrates.

Sediments deposited in these marine environments preserved a wide variety of fossils that today provide valuable information about the ecosystems of the late Neogene period.

Fossilisation and Preservation

Shark teeth fossilise exceptionally well due to their dense enamel composition. During the shark’s lifetime, teeth were regularly shed and replaced, allowing many teeth to accumulate on the seafloor.

After being buried in marine sediments, the teeth underwent mineralisation that preserved their structure for millions of years.

Typical fossil preservation characteristics include:

• Mineralised enamel surfaces
• Well-defined cusps and cutting edges
• Strong fossil root structures
• Natural colour variations depending on sediment chemistry

These natural fossilisation processes create durable specimens that preserve the original tooth structure in remarkable detail.

A Rare Fossil from the Pliocene North Sea Basin

Shark fossils from the Oosterhout Formation are highly sought after by collectors due to the rich fossil assemblages discovered within these sediments. The region has produced numerous species of prehistoric sharks that once inhabited the ancient seas of northwestern Europe.

Specimens of Notorynchus primigenius are particularly interesting because they represent an evolutionary link within a shark lineage that still survives today.

Whether displayed in a fossil collection, used for geological study, or appreciated as a remarkable piece of prehistoric marine history, this rare Pliocene sevengill shark tooth fossil represents an authentic relic from ancient oceans.

The fossil shown in the photographs is the exact specimen you will receive.

All fossils sold are 100% genuine natural specimens and include a Certificate of Authenticity lifetime guarantee card.