Rare Hildoceras bifrons Ammonite Fossil, Toarcian Stage Jurassic, Authentic Kettering UK Collectors Specimen with COA

Description

Authentic Jurassic Ammonite Fossil

This listing presents a genuine Hildoceras bifrons Ammonite Fossil from the Toarcian Stage of the Early Jurassic period, discovered in Kettering, Northamptonshire, United Kingdom. Ammonites are extinct marine cephalopods within the subclass Ammonoidea, closely related to modern squid and cuttlefish. Their chambered, coiled shells are among the most recognisable fossils, sought after both for their natural beauty and their scientific value. This specimen has been carefully chosen and photographed to display the exact ammonite you will receive, with a 1 cm scale cube provided for accurate size reference.

Geological Context – Toarcian, Jurassic

The Toarcian Stage, dating to approximately 182–174 million years ago, represents a dynamic interval of the Early Jurassic. It is most notably associated with the Early Toarcian Oceanic Anoxic Event, a major environmental shift that reshaped global marine ecosystems. During this time, much of what is now Northamptonshire was submerged beneath shallow seas, rich in marine life. The fine-grained sediments deposited in these environments preserved ammonites and other invertebrates in remarkable detail.

The Toarcian ammonite record from Britain is among the most important in Europe, providing crucial data for paleontology and stratigraphy. Ammonites such as Hildoceras bifrons are used as index fossils, helping geologists define precise biozones within the Jurassic sequence.

Species Profile – Hildoceras bifrons

The ammonite Hildoceras bifrons is one of the most iconic and widely recognised species of the Toarcian Stage. It belongs to the family Hildoceratidae, within the superfamily Hildoceratoidea, order Ammonitida. This family is known for strongly ribbed, compressed shells with distinctive planispiral coiling.

Key features of Hildoceras bifrons include:

• A compressed, planispiral shell with moderately involute coiling.
• Strong, bifurcating ribs that typically split into two as they cross the flanks, giving the species its name “bifrons.”
• A sharp keel running along the venter, characteristic of the genus.
• Visible suture lines representing the intricate internal structure of the ammonite shell.

These distinctive features make Hildoceras bifrons an easily recognisable ammonite and an important reference fossil in Jurassic biostratigraphy.

Paleoenvironment and Scientific Importance

During the Toarcian, ammonites such as Hildoceras bifrons thrived as nektonic predators, swimming actively in the warm seas that covered much of Europe. They fed on small marine organisms and were themselves a vital part of the Jurassic marine food chain. Upon death, their shells sank to the seabed, where they were quickly buried by sediment, allowing their preservation for nearly 180 million years.

Hildoceras bifrons is especially significant in paleontology due to its restricted stratigraphic distribution. Its presence defines specific ammonite biozones within the Toarcian, allowing geologists to correlate strata across wide regions with precision. Collectors value this species for its distinctive ribbing, keel, and historical importance.

100% Genuine with Certificate of Authenticity

All of our fossils are guaranteed 100% genuine specimens and are supplied with a Certificate of Authenticity. This ammonite is not a reproduction or cast but an authentic relic of the Jurassic seas of Kettering, preserved in stone for millions of years.

A Collector’s and Display Fossil

This Hildoceras bifrons ammonite fossil from Kettering, United Kingdom is an exceptional specimen for fossil enthusiasts, students of geology, and serious collectors. Its combination of aesthetic appeal, geological importance, and scientific relevance ensures it will be a valuable addition to any collection or display.

Scale Rule Squares / Cube = 1 cm. Please see listing photos for the full sizing of this actual specimen.