Rare Haugia variabilis Fossil Ammonite Jurassic Toarcian Caen France Authentic Specimen With COA

Description

Overview & Authenticity

Offered here is a rare and genuine fossil ammonite, Haugia variabilis, a classic and highly collectible species from the Middle Toarcian Stage of the Jurassic Period, discovered in the renowned fossil localities around Caen, Normandy, France. This specimen is a carefully selected example, photographed individually so the fossil shown is the exact piece you will receive. It is supplied with a Certificate of Authenticity, providing a lifetime guarantee that the fossil is a genuine natural specimen

Full sizing details are provided in the photographs to ensure complete transparency for collectors.

Geological Age & Stratigraphy

This ammonite dates to the Middle Toarcian (~182–178 million years ago), a subdivision of the Early Jurassic, a time when warm, shallow epicontinental seas covered much of what is now western Europe. The Toarcian is particularly significant in geological history due to widespread marine anoxic events, which led to exceptional fossil preservation and a rich diversity of ammonites.

The Caen region is internationally recognised for its Toarcian marine sediments, primarily composed of calcareous marls and limestones, deposited in a relatively low-energy offshore environment. These conditions allowed ammonites to fossilise with fine morphological detail preserved.

Fossil Type & Taxonomy

• Fossil Type: Ammonite (extinct marine cephalopod)
• Genus & Species: Haugia variabilis
• Family: Hildoceratidae
• Superfamily: Hildoceratoidea
• Order: Ammonitida

Ammonites are extinct relatives of modern squid and octopus, possessing a coiled, chambered shell used for buoyancy control. Their rapid evolution and wide geographic distribution make them vital index fossils for Jurassic stratigraphy.

Morphological Features & Notable Traits

Haugia variabilis is admired for its evolute coiling, moderately compressed whorl section, and strong ribbing that often bifurcates across the flanks, giving the shell a dynamic, textured appearance. The ribs typically curve gently forward, reflecting hydrodynamic adaptation for efficient movement through the water column. Sutures are complex and finely incised, characteristic of advanced Jurassic ammonites.

The species name variabilis reflects the natural variability in rib strength and spacing observed across specimens, making each fossil visually unique.

Depositional Environment & Palaeoecology

During the Middle Toarcian, the Caen area lay beneath a warm, shallow marine sea populated by ammonites, belemnites, marine reptiles, and diverse invertebrates. Haugia species were nektonic predators, actively swimming and feeding on smaller marine organisms. Their widespread distribution and abundance make them key indicators of Toarcian marine ecosystems.

Collectability & Display

French Toarcian ammonites are highly sought after due to their scientific importance, aesthetic appeal, and classic locality status. This specimen is ideal for serious collectors, educational displays, museums, or as a standout feature in a private fossil collection. Its provenance, rarity, and clear identification significantly enhance its long-term collectability.

Guarantee & Presentation

• Genuine fossil specimen
• Individually photographed item
• Includes Certificate of Authenticity with lifetime guarantee
• Carefully selected for quality and preservation

This Haugia variabilis ammonite represents a tangible piece of Jurassic marine history, preserved for nearly 180 million years and now available as a remarkable and authentic collectible.