Rare 5.5″ Fossil Ammonite Haugia variabilis, Jurassic, Middle Toarcian, Ilminster UK, Genuine with COA

Description

Presenting a rare and striking 5.5-inch Fossil Ammonite of Haugia variabilis from the Middle Toarcian Stage of the Jurassic Period, discovered in the renowned fossil-rich region of Ilminster, Somerset, United Kingdom. This exceptional specimen comes from beds that have produced some of the finest Lower Jurassic ammonites in Britain.

The photographs show the exact specimen you will receive, showcasing its natural beauty and preservation quality.

Scale Rule Squares / Cube = 1cm — full sizing available in the image.

Key Geological and Scientific Information:

• Species: Haugia variabilis
• Fossil Type: Ammonite (extinct marine cephalopod)
• Geological Period: Jurassic
• Geological Stage: Middle Toarcian (~181 million years ago)
• Location: Ilminster, Somerset, UK
• Formation: Beacon Limestone Formation or equivalent Toarcian strata
• Order: Ammonitida
• Superfamily: Hildoceratoidea
• Family: Hildoceratidae
• Described By: (Sowerby, 1815)

Morphology Features:

Haugia variabilis is known for its elegantly ribbed, compressed shell with moderately involute coiling. The ribs typically bifurcate along the flanks and are slightly sinuous, crossing the venter with subtle curvature. The species is named “variabilis” due to the natural variation in rib strength and density. This example shows well-defined features across the shell with excellent preservation.

Biozone and Stratigraphy:

This ammonite is associated with the Bifrons Zone, more specifically within the Variabilis Subzone of the Middle Toarcian. This makes it an important fossil in biostratigraphic correlation across European Jurassic sequences.

Depositional Environment:

The fossil was deposited in an offshore marine environment, part of a calm, low-energy shelf sea during the Jurassic transgression. The fine-grained sediments of Ilminster helped preserve ammonites in remarkable detail, contributing to its fame among palaeontologists.

Scientific & Collectible Importance:

Haugia variabilis is valued both as a biostratigraphic index fossil and as a collector’s piece due to its aesthetic shell form and geological significance. This specimen is particularly notable due to its large size (5.5 inches) and clear morphological detail.

Authenticity Guarantee:

All of our fossils are 100% genuine specimens, professionally sourced and handled with the highest care. A Certificate of Authenticity is included with every purchase for your records and peace of mind.

This Haugia variabilis fossil ammonite offers an ideal combination of scientific significance, aesthetic beauty, and historical intrigue — a perfect addition to any fossil collection or Jurassic display.