Rare 5″ Fossil Ammonite Prososphinctes mazurianus | Jurassic Upper Callovian Hauberg Germany | Genuine + COA

Description

This listing is for a rare and finely preserved 5-inch fossil ammonite, Prososphinctes mazurianus, from the Upper Callovian Stage of the Jurassic Period, discovered in Hauberg, Germany. The photo shows the exact specimen for sale. Each square scale cube equals 1cm — please refer to the image for full sizing.

This specimen has been carefully selected for its scientific and aesthetic quality, making it ideal for collectors, educational displays, or palaeontological reference.

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

 

Geological & Scientific Details:

• Fossil Type: Ammonite (complete or near-complete shell)
• Species: Prososphinctes mazurianus
• Order: Ammonitida
• Superfamily: Perisphinctoidea
• Family: Perisphinctidae
• Geological Stage: Upper Callovian (approx. 164.7 – 161.2 million years ago)
• Biozone: Likely associated with the Macrocephalites or Peltoceras zones based on stratigraphic range
• Period: Jurassic
• Locality: Hauberg, Germany
• Depositional Environment: Shallow epicontinental marine setting, typically fine-grained calcareous mudstones or marls common in the European Jurassic basins

 

Morphology & Notable Features:

• Strongly ribbed, evolute shell with exposed inner whorls
• Ribs are simple or bifurcating, crossing the flanks and continuing over a rounded venter
• Shell has a discoidal shape, typical of the Perisphinctidae family
• Whorl expansion rate and suture lines (if visible) help confirm species identification
• Well-preserved detail highlights the striking ornamentation of this ammonite

 

Scientific Importance: Prososphinctes mazurianus is a key representative of Late Callovian ammonite faunas in central Europe and serves as a biostratigraphic marker in correlating marine sequences. It belongs to the Perisphinctidae, a group known for high diversity and wide geographic distribution during the Middle to Late Jurassic.

Formally described in historical German monographs, this species contributes to ongoing research in Jurassic paleobiogeography and ammonite evolution.

 

Ideal For:

• Collectors of rare and display-worthy Jurassic ammonites
• Educational or museum collections
• Scientific reference material for Callovian stratigraphy

 

You Will Receive:

• The exact Prososphinctes mazurianus fossil shown in the photos
• Certificate of Authenticity
• Secure and protective packaging

 

Please don’t hesitate to contact us with any questions or requests for further fossil details. We’re always happy to help with expert knowledge and support.