Aegasteroceras saggitarium Ammonite Fossil | Lower Jurassic, Frodingham Ironstone | Conesby Quarry, Scunthorpe | Alice Purnell Collection

Description

Fossil Type & Species:

This listing features a genuine ammonite fossil of Aegasteroceras saggitarium, a beautifully preserved cephalopod from the Lower Jurassic (Lower Lias). This exceptional piece was collected from the famous Conesby Quarry near Scunthorpe, North Lincolnshire, England, and forms part of the distinguished Alice Purnell Collection, a trusted source of rare and scientifically important British fossils.

Geological Formation & Insight:

Aegasteroceras saggitarium belongs to a group of early ammonites known for their sharply ribbed, evolute shells and early Jurassic origin. This species is especially significant in biostratigraphy, being a reliable zonal fossil for the Denotatus Subzone of the Obtusum Zone in the Lower Lias Group.

The fossil comes from the Frodingham Ironstone Formation, a highly fossiliferous unit deposited in shallow marine conditions around 200–190 million years ago, during the Hettangian to Sinemurian stages of the Lower Jurassic. This formation is part of the broader Lias Group, which represents some of the earliest Jurassic marine environments in the UK.

Conesby Quarry, now an iconic locality, is known for producing beautifully preserved ammonites, bivalves, and other marine fossils in iron-rich sediment, often with excellent detail and natural mineralisation. Fossils from this site are prized for their scientific value and visual appeal.

Item Specifics:

• Fossil Type: Ammonite
• Species: Aegasteroceras saggitarium
• Geological Age: Lower Jurassic – Hettangian Stage (~200–196 million years ago)
• Formation: Frodingham Ironstone Formation
• Zone/Subzone: Obtusum Zone, Denotatus Subzone
• Locality: Conesby Quarry, Scunthorpe, North Lincolnshire, England
• Provenance: From the Alice Purnell Collection
• Preservation: Excellent – distinct ribbing, whorl structure, and matrix contrast
• Colour: Typically brown to grey ironstone matrix with fossilised shell
• Size: Please refer to the photo – scale cube = 1cm
• Condition: 100% natural, no restoration
• Specimen: The exact fossil pictured is the one you will receive

Authenticity Guarantee:

All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity. This ammonite is part of the esteemed Alice Purnell Collection, guaranteeing both authenticity and scientific relevance.

Shipping & Packaging:

Carefully packaged with tracking for secure delivery. A rare and scientifically valuable specimen ideal for collectors, educators, or anyone passionate about Earth’s prehistoric past.

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