Rare 7″ Fossil Ammonite Haugia phillipsi Split Nodule | Jurassic Toarcian North Yorkshire UK | Genuine + COA

Description

This listing features a rare, beautifully preserved 7-inch fossil ammonite, Haugia phillipsi, presented as a split nodule from the Middle Toarcian Stage of the Early Jurassic, collected from North Yorkshire, United Kingdom. The specimen exhibits exceptional detail, preserved in a finely split nodule typical of the Whitby area. The photograph shows the actual specimen you will receive. Each square or cube in the scale photo represents 1cm — please refer to the images for full sizing.

This ammonite is a prized addition for collectors, educators, and fossil enthusiasts seeking rare and stratigraphically significant material.

All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity.

Geological & Scientific Information:

• Fossil Type: Ammonite (split nodule)
• Species: Haugia phillipsi
• Order: Ammonitida
• Superfamily: Hildoceratoidea
• Family: Hildoceratidae
• Geological Stage: Middle Toarcian (approx. 181 – 178 million years ago)
• Biozone: Bifrons Zone, associated with richly fossiliferous marine deposits of the Whitby Mudstone Formation
• Formation: Whitby Mudstone Formation
• Period: Jurassic
• Locality: North Yorkshire, England, UK
• Depositional Environment: Offshore marine basin with low oxygen conditions; fine-grained mudstone allowed for exquisite fossil preservation in concretions

Morphology & Notable Features:

• Strongly ribbed, evolute shell with wide whorls and bold ornamentation
• Ribs are dense, rounded, and may bifurcate mid-flank, with some extending across the venter
• Shell morphology includes a broad umbilicus and deep whorl overlap
• Specimen is preserved in a split nodule, a common feature of Toarcian ammonites from the Yorkshire coast — revealing both halves with mirror-like fidelity
• Displays excellent suture detail and symmetry, ideal for display or study

Scientific Significance:

Haugia phillipsi is a key ammonite species for correlating Middle Toarcian marine strata in Northern Europe, particularly within the Bifrons Zone, a critical biozone for Jurassic palaeontology. The genus Haugia was named in honour of French palaeontologist Gustave Haug and includes species known for their stratigraphic utility and aesthetic preservation.

This species is also commonly associated with other ammonites such as Dactylioceras, but is far rarer and more sought-after due to its larger size and complex ribbing pattern. Specimens like this help inform regional biostratigraphy and evolutionary studies of the Hildoceratidae.

Ideal For:

• Serious ammonite and fossil collectors
• Educational institutions and palaeontology students
• Natural history museum collections
• Gifts for geology lovers or heritage display

What You Will Receive:

• The exact split-nodule specimen of Haugia phillipsi as shown in the listing images
• Certificate of Authenticity
• Professionally packaged for safe and secure delivery

Please feel free to message us with any questions or if you’d like help expanding your fossil collection. We’re always happy to assist.