Description
For sale is a genuine and scientifically significant Polymorphites quadratus fossil ammonite, collected from the Lower Pliensbachian stage of the Early Jurassic, found in the Osnabrück region of Germany. This locality is part of the classic fossil-rich strata of the North German Jurassic Basin.
Polymorphites quadratus belongs to the family Eoderoceratidae and is characterised by its involute coiling, strong ribbing, and a shell with a somewhat squared whorl section—hence the name quadratus. Its ribs often bifurcate and extend across the flanks, giving it a bold, sculpted appearance. This morphological distinctiveness makes it valuable both for collectors and biostratigraphic study.
- Species: Polymorphites quadratus
- Order: Ammonitida
- Superfamily: Eoderoceratoidea
- Family: Eoderoceratidae
- Geological Stage: Lower Pliensbachian, Early Jurassic
- Location: Osnabrück, Germany
- Depositional Environment: Shallow marine shelf, within the epicontinental Jurassic sea
- Biozone: Ibex to Davoei zones (associated with genus Polymorphites)
This ammonite is approximately 190 million years old, and fossils from this zone represent a post-extinction radiation of cephalopods following the end-Triassic event. The preservation quality of this specimen highlights the excellent fossilisation conditions of Osnabrück’s Lower Jurassic beds.
This is a carefully chosen fossil, and the photo shows the exact item you will receive.
- Scale cube = 1cm. Please refer to the photo for full sizing.
All our fossils are 100% genuine specimens and come with a Certificate of Authenticity, ensuring their scientific and collector value.
What You Will Receive:
- 1 x authentic Polymorphites quadratus ammonite fossil (pictured specimen)
- Certificate of Authenticity
- Professional packaging for safe delivery
Why Buy From Us?
- Responsibly sourced, professionally prepared fossils
- Guaranteed authenticity and documentation
- Trusted by private collectors, educators, and researchers
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